Favero power meter

Favero power meter DEFAULT

Last year, we reviewed the Favero Assioma Duo and hailed it as the best dual-sided power meter for most cyclists. There was only one reason we said not to buy them, is if you were one of the many riders using Shimano SPD-SL pedals. At the time, these excellent power meter pedals were only Look Keo compatible. The release of the Favero Assioma Duo Shi pedals brings Shimano SPD-SL compatibility too, but it’s not without its issues.

  • BYO Shimano pedal bodies—the package only includes the power spindles.
  • Dual-sided power meter pedals, with claimed 1% accuracy.
  • Rechargeable batteries, with claimed 50 hours of ride time.
  • Bluetooth and ANT+ protocols.

Assioma DUO-Shi


  • Incredibly easy to use and switch from bike to bike once set up
  • Duel-sided reading, excellent accuracy, Bluetooth and ANT+ compatible
  • Rechargeable batteries with 50 hours of ride time
  • BYO - Shimano pedals
  • Adds 26mm to your pedal stance (Q-factor)

As you might have guessed, the Shi in the name of these new Assioma power meters indicates their compatibility with Shimano’s SPD-SL pedal system. They join the existing Look Keo compatible Assioma pedals in the Favero range. Both systems share the same technology and all the same features; including auto-calibration, claimed 1% accuracy, and ANT+ and Bluetooth connectivity.

Trevor Raab

The most glaring distinction between the two models is that while the original Assioma Duo were actual whole pedals, the new Duo are only the power-based spindles, which you install yourself into Shimano pedals. Keep in mind that these spindles are only compatible with R8000 (Ultegra), R7000 (105), R6800 (previous generation Ultegra), R550, and R540 road pedal models. If you’re currently riding Dura-Ace pedals, which use a different axle design, you’ll need to factor in the cost of a compatible pedal body as well.

Trevor Raab

Chances are if you are interested in the Duo Shis, you already own a set of compatible Shimano pedals. But, not every rider is going to be interested in disassembling their existing pedals and installing new axles. While it is not an overly complicated procedure, it involved enough time that there should be a larger price difference between the Assioma Duo—which sell for $676 as complete pedals—and the Duo Shi, which are only $88 cheaper. The only other Shimano compatible pedal-based power meter—the Garmin Rally RS200 pedals—sell for $1,100. This alone makes the Duo Shis seem downright affordable, even factoring in taking them to a shop for installation.

Since riders are using their existing Shimano pedal bodies, stack height remains unchanged. However, the Assioma Shi spindles do change the Q-factor (the stance width of the pedals) by quite a substantial 13mm over a stock Shimano pedal. This highly personal element of bike fit can play an important role in things like knee alignment and muscle activation.

Trevor Raab

Trevor Raab

Most Shimano road cranks have a Q-factor around 146 mm, that grows another 18mm for something like a gravel race bike, while modern mountain bikes are around 24mm wider (although this number keeps growing as mountain bike tires keep growing wider). While in theory, a widening Q-factor could lead to a drop in performance, the reality is that many riders routinely ride a variety of bikes with a variety of Q-factors, with few ill effects. However, for some riders, adding 26mm to your pedal stance (compared to a standard set of Shimano pedals) will absolutely be a deal-breaker.

Ride Impressions

Once you have the spindles installed into pedal bodies, installing the Duo Shis on a bike is as easy as installing any other set of pedals. Getting the pedals paired with a head unit was hassle-free but, before you can get any data from them you have to activate your pedals using the Assioma App. Once transmitting, I’ve found the Assioma Duo to track in line with other power meters I have used. The data was consistent through many rides, and I didn’t experience any annoying dropouts or erroneous spikes in power when hitting a bump.

Trevor Raab

You can perform a zero-reset procedure from your head unit, or the Assioma app. In theory, this shouldn’t be something you need to do regularly as the pedals automatically compensate for temperature changes to give accurate readings even if the temperature swings drastically. In simple terms, the Duo Shis were very much a set it and forget it power meter. The only time a bit of extra attention was required was during travel. The pedals are activated by motion, so a cross-country drive or flight could deplete the battery. However, there is a “Travel Mode” function in the app. This function deactivates the pedals and requires that you connect the pedals to the charger to wake them back up.

Trevor Raab

There are some long-term bearing durability concerns with the Assioma Duo, mainly because the Shimano cup-and-cone bearing system is a benchmark for reliability and durability. To fit its power meter axle into the Shimano pedal body, Favero was forced to move away from this design, in exchange for a sealed cartridge bearing (on the outer end of the axle) and a nylon bushing (on the inner side). It’s hard to say if this will be a genuine issue of concern, or if I’m ringing the “replacing good bearings with a nylon bushing is bad” alarm bell too soon. In the short-to-medium term, Favero backs up these pedals with a two-year warranty.

Until now, the only SPD-SL compatible power meter pedal on the market has been the Garmin Rally pedal. So, it’s exciting to have Favero bring some competition to this space. Favero has proven to be a trustworthy name in the power meter segment. The Assioma Duo Shi pedals continue that reputation with one obvious trade-off: Q-factor This is a highly personal element of bike fit, but if the wider stance works for you, then you will probably be very happy with the Assioma Duo Shi.

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Sours: https://www.bicycling.com/bikes-gear/a37201566/tested-favero-assioma-duo-shimano-power-meter-pedals/

Favero Assioma Duo power meter pedals review

The Favero Assioma Duo power meter pedals have been out for a few years now and although Favero isn’t a huge name in cycling, like Shimano or SRAM, it has earned an excellent reputation in a short amount of time.

The pedals themselves weigh 305g for the pair. That’s a little heavier than a standard Shimano 105 SPD-SL pedal (which doesn’t include a power meter), but it’s less than the Garmin Vector 3 or PowerTap P1 power meter pedals, which come in at 320g and 442g, respectively.

The power meter internals are all housed in the pods on the pedal spindle. This does mean the aesthetics of the pedals aren’t as clean as the Garmin Vector 3 power meter pedals, where the internals are housed inside the pedal body, but it actually has some useful upsides (I’ll come to these later).

Unlike the Garmin Vector and the PowerTap power meter pedals, the Assioma’s also have internal rechargeable batteries.

The pedals cost £639 / €695 / $815. That’s very competitive for a true dual-sided power meter.

They also promise +/- 1 per cent power accuracy, and 50 hours of use from an internal, rechargeable battery.

Power to the pedal

While the majority of cycling power meters measure force at the cranks, a pedal-based power meter arguably has a number of advantages over crank-based ones.

Since you actually apply power to the pedals and not the cranks, for example, a pedal-based system should theoretically be able to give you a more accurate measurement of your power output because it’s being measured as close to the source as possible.

They also don’t tie you to a set crank length, like a Stages or Shimano power meter does. If, for example, you want to use different sized cranks on your road bike and your time trial bike (shorter cranks have been gaining popularity in time trial and triathlon in recent years), a pedal-based system allows you to do so easily.

Finally, pedal-based power meters can also be simple to swap between bikes (ideally as simple as swapping any other pedal), and won’t require you to change a bottom bracket like you may need to with crank or spider-based power meters.

As a previously devout Shimano SPD-SL pedal system user though, the thought of changing pedal systems admittedly filled me with a little dread.

I can happily report that while the Assioma pedal body and Look-style cleats don’t quite live up to the lofty standards of SPD-SL, the switch has been worth it.

Favero Assioma Duo – What I like

To start with, installation is incredibly easy. You just need an 8mm Allen key, and they screw on like any other pedals (meaning the left pedal is reverse threaded). The manual indicates you should tighten them to a torque of around 35 to 40Nm.

Simon Bromley / Immediate Media

Favero also has a dedicated app for the Assioma Duo, available on iOS and Android, which is used to activate the two-year warranty, update firmware, check battery levels and access product support. It’s very easy to use – all power meters should have support apps like this.

As noted, the actual electronics are located in the pods on the end of the pedal spindle. These are a little unsightly, but they don’t have any negative effects while in use and, because no electronics are housed in the pedal bodies themselves, the important parts are protected from damage in the event of a crash.

Also, should you damage a pedal body, you can swap it out for a new one (they cost about £50 / €60) without any specialist tools.

Simon Bromley / Immediate Media

Theoretically, the pods could interfere with the soles of some cycling shoes that are very wide at the front. In that case, you might need to widen your stance width slightly or use a shim to increase your shoe’s stack height from the pedal.

Using my size EU45 Bont Zero+ cycling shoes (Bonts are generally wider at the front than most cycling shoes), with the cleats positioned to narrow my stance width as much as possible, I didn’t experience any interference, so I don’t believe this will be a concern for many.

The pedals charge via magnetic connecters, and Favero handily includes two, two-metre long USB leads and a dual plug, so you can charge both pedals simultaneously.

Battery life is also good. Favero quotes 50 hours per full charge, which seems about right from my testing.

Though that might not sound like much compared to power meters that use replaceable batteries (which usually eke out around 200 or so hours per battery), unless you’re a professional cyclist doing 30 hours a week on the bike, you likely won’t have to charge the Assiomas more than once a month.

And if you are someone who does ride a lot, you actually stand to save a fair bit of money by not having to keep shelling out for pricey replacement batteries.

Internal, rechargeable batteries also eliminate a potential weak point for moisture ingress, which can be a real killer for power meters and other electronics.

Simon Bromley / Immediate Media

On that topic, the Assioma Duos have an IP67 waterproof rating and I experienced no issues with using them in the rain or aggressively washing them with a bucket and sponge.

The downside is that the batteries are not replaceable, and (like any rechargeable battery) ultimately have a finite life – when the batteries go, the power meter is kaput.

That sounds bad, but Favero says the batteries are likely to only lose around 20 per cent of their original capacity after 500 charge/discharge cycles.

To put that into context, that’s 25,000 hours of use, or over 13 years of training five hours a day, every single day. And even then, they’d still have a battery life of around 40 hours.

If you’re really concerned about long-term lifespan, some of these effects can be mitigated (to a certain extent) by following best practices for battery health. Things such as avoiding extreme temperature, not letting the batteries completely go flat, not leaving them to charge overnight, keeping the firmware update, etc. The kind of things you might do with a smartphone.

Favero Assioma Duo – What I liked less

It’s marginal, but the standard pedal body and cleats aren’t as good as Shimano’s SPD-SL system.

It’s a small difference, but the Look-style cleats don’t quite have the same adjustability range as Shimano SPD-SL cleats. This won’t be a problem for anyone who already uses Look-style cleats, or for the vast majority of people whose cleat position simply falls within the available adjustment range (some cycling shoes even have adjustable bolt holes that would likely mitigate this issue entirely).

But, for those who run particularly extreme cleat positions, this could cause issues. With SPD-SL cleats, for example, I used to run them as rearwards as possible, but Look-style cleats simply won’t go as far back.

Furthermore, if you can’t replicate your current cleat position, this is likely to have minor knock-on effects for your saddle height and saddle-to -bar drop too, which you may also need to consider.

Simon Bromley / Immediate Media

For those who aren’t fussy about positional setup, or fall within the available adjustment range, this won’t be an issue at all, though. The small changes were also something I was able to quickly adjust to.

However, for those who are particular about their position or have injuries that could be aggravated by adjustments like this, I’d recommend checking your position with a professional bike fitter after swapping to these pedals, or at least allowing for a period of adaptation before you take on any heavy training loads.

The included red cleats (which have six degrees of float – black cleats with 0 degrees of float are available separately) are also very slippery to walk on, particularly around the toe end. Genuine Look Keo Grip cleats are a little pricier, but are much better in this regard.

Simon Bromley / Immediate Media

It’s worth noting there is now a Shimano SPD-SL compatible version of the Assioma Duo, called the Assioma Duo-Shi.

This ships as a set of power meter pedal spindles only, and you have to supply your own SPD-SL compatible pedal bodies.

Due to the spindle pods and the wider pedal body Shimano SPD-SL cleats require, however, the Q-factor on the Assioma Duo-Shi has been increased to 65mm. That’s 11mm wider than the Look Keo-compatible Assioma Duo, and 10mm wider than on the SPD-SL compatible Garmin Rally RS200 power meter pedal.

Simon Bromley / Immediate Media

Lastly, the pedal bodies spin very freely on the spindle. This is good in one sense because it should mean low frictional losses, but it also means that when pushing off in a low gear, the pedal to which you’re not clipped into has a tendency to spin wildly for a couple of seconds before settling.

You can try to catch it with your foot, but it’s pot luck as to whether you catch it the right way up (like most other road specific pedals, these don’t offer dual-sided entry). This means it takes just a second or so longer to clip-in than with Shimano SPD-SL pedals I’ve used.

No big deal for most people, but if you race criteriums (or time trials and hill climbs in times of social distancing, when you won’t have a starter to hold you up on the line) then being able to clip-in quickly is absolutely vital because there’s always a fight for position in the opening laps.

As the pedal body can be disassembled for servicing, it may be possible to add a little grease to the bearings and slow them down, but I’ve not resorted to trying that yet.

Are the Favero Assioma Duos accurate?

Over the course of my testing I compared the pedals simultaneously against other benchmark power meters, including my SRM Dura-Ace 7800, a Verve Infocrank and the new Wahoo Kickr smart trainer, both outside in the real world and indoors on Zwift.

Favero claims the Assioma Duos are accurate to +/- 1 per cent, and while I’m not in a position to verify that claim, I nevertheless found them to be both accurate and reliable over the course of months of testing and numerous rides.

What impressed me most was their ability to stay accurate and consistent even when regularly swapping them between bikes without using a torque wrench.

As Favero recommends, I made sure to zero offset (calibrate) the Assioma Duos after swapping them onto a different bike, but I never had any concerns about the data or any signal drops.

I’ve selected a small sample of rides to evidence my experience, but I could have chosen any rides I’ve done over the past few months because I can’t remember any instances where they’ve reported anything weird or unusual.

Sours: https://www.bikeradar.com/reviews/training/power-meters/favero-assioma-duo-power-meter-pedals-review/
  1. Dark waters synopsis
  2. 2016 slingshot value
  3. Cafe astrology daily
  4. Precious moments coloring


Favero Electronics

Power your Training with Assioma

Power Meter Pedals

Breakthrough technology applied to training with power.
Do not limit your cycling potential: choose Assioma.

Ready to go For anyone, anywhere

  • Install it in seconds
  • Easily transferable between bikes
  • Bluetooth and ANT+ connectivity
  • Auto-calibration system

It couldn’t be easier.

Shimano® Compatibility

Do you ride Shimano®?

Assioma is for you too!

Take full advantage of your current Shimano® pedal bodies* with your brand-new Assioma DUO-Shi. Start training with unmatched power accuracy and consistency.

Extreme Accuracy The only one with IAV Power

Many power meters calculate power using the estimated average angular velocity per rotation instead of the real Instantaneous Angular Velocity value: this may introduce an additional error of up to 4.5% compared to declared accuracy.

Assioma, instead, thanks to its exclusive IAV Power system and an on-board gyroscope guarantees the same ±1% accuracy with any pedaling style: even with oval chainrings.

A Superior Experience Much more than power and cadence

Become a better cyclist

Using its gyroscope, Assioma provides advanced metrics to deeply analyze your pedaling.

On top of that, consistent and accurate data will lead you through the most rewarding cycling experience.

Long-term Reliability

    & LIGHT

Is your power meter really waterproof?

Ours is. The electronic parts are safely housed inside a bi-component resin block, resulting in an electronic-less pedal body.

Waterproofness and resistance are guaranteed whatever the conditions with the lightest power meter pedal around.
  1. LIGHT 151.5gLIGHT 151.5g

The added Value of our rechargeable battery


A special watertight resin and no battery compartments to open avoid any risk of water, mud or dust ingress and oxidation problems.


At least 50 hrs with a single charge. The rechargeable battery has been designed to provide long performance over time.

Magnetic connectors

Recharge your pedals simultaneously with a double micro-USB cable with magnetic connectors. This system avoids damages caused by accidental yanks and permits recharge even with a simple power bank!

The human factor built into every Assioma

The human factor built into every Assioma

You can count on a highly-specialized after-sales support provided by our experts.

In a few words: a team determined to never let you down!
Strong of more than 30 years of experience we design and manufacture every Assioma in our facility in Italy. Just a step away from the Dolomiti reliable power meter pedals become true.


Assioma DUO

Assioma DUO

Sensors on both pedals


Assioma UNO

Assioma UNO

Sensor on left pedal


Assioma DUO-shi

Assioma DUO-shi

Sensors for Shimano®


Total weight per pedal: 151.5g

Q-factor: +54 mm
Stack height: 10.5 mm

Sensor's weight: 99.0 g per side

Total weight: 157.0 g* per side
Q-factor: +64/+65 mm*
Stack height: Shimano® standard

Wide compatibility No limits to your passion

Devices and apps

You can pair Assioma via BLE or ANT+. This makes it compatible with the majority of bike computers, smart watches, smartphones and even popular cycling apps.

No matter your bike set-up

Assioma is compatible with any bike set-up you choose.

Look Kéo Cleats® and Shimano®

Choose the Assioma version that fits your preference better.
Wide compatibility No limits to your passion - Favero Electronics

Assioma App

  • Activate Assioma.*
  • Update the firmware.
  • Calibrate the sensors.
  • Set the crank-arm length.
  • Check the battery charge level.
  • Set the “Travel mode".
  • Extend the compatibility with other apps.
  1. apple
  2. google

* Assioma needs to be activated only once in its first use. Activation can be done only via the Assioma App on a smartphone connected to the internet and paired to the cycling power meters via Bluetooth. More information on the manual.

Sours: https://cycling.favero.com/

Favero Assioma DUO-Shi Power Meter In-Depth Review (Shimano SPD-SL variant)

Favero has launched their newest Assioma variant today, the DUO-Shi, which simply takes the existing Favero Assioma pedals, but now with Shimano SPD-SL compatibility. Sorta.

See, while that’s the end-point, the DUO-Shi product is actually just the pedal spindles (for $589USD or ~589EUR including VAT (VAT inclusive pricing varies based on exact EU country). You’ll need to go out and buy the Shimano SPD-SL compatibility pedals of your own choosing. The good news there is that makes this product roughly $500-$600 cheaper than Garmin’s Rally SPD-SL variant. The bad news is you’ve got an arts and crafts project, plus some other technical things to consider. Don’t worry, we’ll talk about that in a second.

In any case, I’ve actually been quietly testing them for more than a *year*. Yes, an actual year. On and off (literally and figuratively), compared to a wide range of power meters, bikes, and smart trainers. Quietly removing them before photoshoots, but otherwise using them just like any other Favero Assioma pedal (because, they are exactly the same).

More recently I got the final production version in, which…are exactly the same internally as well. But with that comes final packaging and all the final goodness you’d expect. So that’s what I’m focusing on in this review. Oh, speaking of which, these are media loaner units, and both sets will go back to Favero afterwards. I’ve already got a few other Favero Assioma sets I’ve bought over the years that I use around the DCR Cave.

If you found this post useful, consider becoming a DCR Supporter which makes the site ad-free, while also getting access to a mostly weekly video series behind the scenes of the DCR Cave. And of course, it makes you awesome.

What’s New & Unique:


In short, nothing is new. This is the exact same Favero Assioma spindle as the previous edition, except it’s got a small oil retainer glued on. Instead, that tiny cap enables it to be inserted properly into a Shimano pedal, which in turn will measure your power exactly like the previous Favero Assioma. Favero says though that the gluing of that small retainer on the pedal spindle requires them to have a factory calibration procedure, which is why they can’t just offer a simple $20 conversion kit.

Otherwise, Favero states it’s exactly the same spindle as before. So this means that the pod remains as before.

Now – what’s important to know here is that this isn’t a completed product you can take home and install immediately on your bike. Instead, you will ALSO need to buy compatible Shimano pedal bodies (or perhaps you already have them), and then insert the Favero spindle into the Shimano pedals. This requires two wrenches that you probably have at home, and about 3-5 minutes of work.

The Assioma Duo-SHI are compatible with the following Shimano SPD-SL (road) type pedals (and thus SPD-SL cleats):

Shimano PD-R8000
Shimano PD-R7000
Shimano PD-6800
Shimano PD-R550
Shimano PD-R540

Note that Shimano’s DuraAce pedals use a different internal spindle, and thus are not compatible.

When all that is said and done, you’ll have a Shimano Favero Assioma power meter system, though with a slightly expanded Q-Factor, from 54mm to 65mm. The q-factor is the measurement of the distance between the pedal bodies (specifically the point the pedal is inserted into the crank arm). However, in this case, that would incorrectly not account for the pedal platforms being further out, thus, in reality, a better comparative measurement here is to the center of the pedal platform.

Q-Factor is confusingly stated as a measurement of one of two things:

1) The distance between the crank arms on both sides of the bike
2) The distance between the crank arm and the center of the pedal platform.

Much will be made about the increased q-factor by Favero. For some people, it’s everything and a deal-breaker. For the other 98% of us…shrug. The reason? Almost every bike type has a different q-factor. For fun, here’s my collection of bikes:

My road bike (Canyon Ultimate CF SL): 140mm
My triathlon bike (Cervelo P3C): ~150mm
My mountain bike (Canyon Exceed CF SL 5.0): 170mm
My cargo bike (Urban Arrow): 170mm

And then here’s a pile of popular indoor bikes, and their q-factors, for reference:

Stages Bike SB20: 157mm
Peloton Bike/Bike+: 170mm
Tacx NEO Smart Bike: 147mm
True Kinetix TrueBike: 155mm
Wattbike Pro: 173mm
Wattbike ATOM: 160mm
Wahoo KICKR Bike: 150mm

And remember, your pedal q-factor is technically atop these measurements. So, when it comes to pedal measurement, we’re talking this bit here, shown on an older Favero Assioma (standard) image:


Variations in pedals, as measured from the edge of the crankset arm to the center of the pedal:

Garmin Vector 3/Rally Series: 53mm (55mm with their stock spacer)
PowerTap P1/P2: 54mm
Favero Assioma: 54mm (55mm with their stock spacer)
Favero Assioma Shimano: 65mm
Shimano Ultegra (non-power): 53mm
SRM X Power: 54mm

So yes, this pedal q-factor is different than others – but so are all your other bikes. So if you’re switching between bikes, you’ll likely never notice. It was a non-event for me. I’ve been riding the Favero Assioma DUO-Shi on and off for a year, alternating days on other road pedals and bikes without ever noticing.

But again – if you’re purely a roadie, then maybe you’ll notice – and of course, if you switch between a mountain bike and road bike frequently, then those are literally a wash. Of course, to each their own. You do you, I just keep pedaling.


To begin, and also to reiterate again – when you buy the DUO-Shi, you DO NOT GET PEDALS. You get spindles, for which you need to buy pedals and put them together. Whereas when you buy regular Favero Assioma pedals, you get the whole thing pre-built (but for LOOK KEO pedals). With that note, here’s the box:


Crack that box open and you’ve got the two spindles poking out. Or rather, the pods poking out.


Here’s a closer look at them:


And, if you play peek-a-boo, you’ll find the spindle below the box top:


Here’s the weight of that:


Now, inside the box you’ll find yourself a pedal wrench, charger block, charger cable, different power adapters, the two spindles, and some washers.

Meanwhile, you’ll need to go out and buy compatible Shimano pedals. If you stick all this stuff in one pile, you can see which parts you need to buy, and which parts they provide. Also, as you’ll soon discover, you’ll also need another two wrenches to actually put the spindles together.


And here you can see essentially how the two spindles align up to replace the two spindles that already exist in the Shimano SPD-SL pedals you’ll buy:


You can also see more clearly how when inserted in, the Favero spindles increase the Q-Factor because of the fact that they’re longer, to accommodate the pod.

With that, let’s put humpty dumpty together.



The manual is relatively straightforward, though the first time you’ll do it it’ll feel like the arts & crafts project it is. But remember, you’re saving $400-$500, so…that’s a lot of ice cream.


You’ll notice above, it asks for both a 17mm wrench and a 19mm wrench. Most people have these. Now, if you’re like me you’ll probably spend half a day looking for them because they’re not organized. I easily found a 17mm wrench, but couldn’t find my 19mm wrench. So, I grabbed a well-aged/ignored adjustable wrench to fill in the gap.


You’ll begin by removing the existing spindle from the Shimano pedal. You’ll use the 17mm wrench for that. It really only takes like 20 seconds.


Then, you’ll grab the (hopefully) correct spindle to insert into the correct pedal. As in, right with right, left with left.


Then you’ll take that 19mm wrench with the Favero spindle and get things all happy and snug with the pedal. Again, takes about 20 seconds:




Well, actually, you’ll now repeat that for the other side, then donezo, for realz this time:


The entire thing at this point will weigh about 157g (per pedal) using the Shimano Ultegra PD-R800 pedals.

Bike Installation:

With everything assembled, we’ll need to get it affixed to our bike. This assumes you’ve removed your existing pedals using either a hex wrench (pictured below, included with the Favero Assioma pedals), or a standard pedal wrench. For the installation however, it requires the below hex wrench (included), as there’s no place to grip a pedal wrench onto due to the pods.


For installation, you can choose to use either of the two spacers (per side). The general gist of this is that you don’t want the pods to touch your crank arm when screwed in. Else that can cause damage to the pods, and inaccurate readings. In most cases, a single spacer will work perfectly, and is what I use.

Then, simply hand/finger spin the pedals onto the crank arm:


Once that’s snug, then go ahead and use the included hex wrench to make it nice and tight. Officially there’s a torque spec there, but since they didn’t include a torque wrench, and since I’ve been around this block long enough to know it won’t matter – you’re basically going to go with “nice and firm tight”, but not “gorilla tight”. Meaning, don’t try and break it. Just give it a mediocre arm-wrestling effort, and you’re fine. Note below how you can still see a tiny gap between the pod and the crank arm – that’s GOOD! If you can’t see any gap, add a spacer.


Now repeat for the other side:


Now, you’ll need to do four things:

A) Wake up the pedals using the power cord
B) Activate the pedals using the app
C) Do a couple of short 5-10 second sprints (indoors or outside, doesn’t matter) to bed them in
D) Do a zero offset

To wake up the pedals for first use, simply attach the power cord pods to them, which pulls them out of the deep-sleep state. Normally just rotating them will wake them up, but for first use, they require attaching the power cable for a second.

Next, grab the Favero Assioma app off the app store, and go through the activation process. It only takes a second, but without it your pedals won’t transmit any data. Again – no activation = no data.


Now, with that set, you can do a zero offset now if you’d like. And that’s fine. We’re gonna do it again in a few minutes. So instead, go and do some hard sprints. Ideally 3-4 of them, and ideally 5-10 seconds long. Also, ideally, as ‘sharp’ as you can. Lazy sprints aren’t good here. You’re essentially trying to tighten up the pedals to the crank arm, which in turn increases accuracy. If you don’t do this, it’ll basically take about a normal ride to complete and you’ll notice slightly inaccurate data during this ride. Again, doing this on a trainer is perfectly fine.


Finally, do one last zero offset (also called a ‘manual calibration’ in the app), on the app or your bike computer. And, if you haven’t already done so, validate your crank length specified in the app matches that of your crank arm (e.g. 172.5mm, 175mm, 170mm – those are the most common three).  It’s printed on the inside of your crank arm, usually near the very end. You can see mine showing 175mm:


Ok, now, let’s talk day-to-day stuffs.

Basic Riding Details:


We’ll first start with the app, and quickly run through some of the options there. The Favero Assioma smartphone app is how you’ll initially activate the pedals, as well as update firmware and configure any settings. For most folks, you’ll probably only touch this app once or twice a year (when Favero releases new firmware). Everything else, including recording your rides, you’ll do on your normal bike computer. This is no recording functionality here.

When you crack open the app you’ll see the option to search for pedals by tapping the magnifying glass. After that, you should see your pedals pop up, showing the ANT+ ID (even though it’s searching via Bluetooth Smart). The ANT+ ID (6624 in my case) is what you’ll see displayed on virtually every bike computer and cycling app. Go ahead and tap connect to connect to your Assioma pedals.


Once connected you’ll first see the screen at the left (below), showing the serial number, ANT+ ID of the set (if in a pair), and the battery level of each pedal. Tap on the settings option at the bottom and you can access all of the settings.


To iterate through some of these settings, the first one is manual calibration, or what’s technically known as a ‘Zero offset’. It recommends doing this with the crank arms vertically oriented, and like all power meters, you want to be clipped out of your pedals (and ideally off your bike). It doesn’t give you any specific value, just a success or fail message.


If you were to head back to the main page, you’ve got the previously mentioned option to set the crank length. This is important. If your crank length is set incorrectly, your wattage will be inaccurate. Not massively so, but slightly off. And since the point of buying an accurate power meter is to have accurate numbers, you’ll want to take the 5 seconds to set this correctly.

Below that is the ‘power scale factor’, which can be used for a wide assortment of non-normal situations. This can include having different crank lengths, or having a known inaccurate pedal (validated via static weight test). I’d argue if you have that scenario, you should contact support and fix it. But hey, you do you.

After that are two different app compatibility settings:

A) Double the power: This is useful for poorly programmed apps and watches (mostly) that still, half a decade later, haven’t figured out how to handle multi-channel power meters.

B) Compatibility with other apps: This is basically a variant of the first double-power category for apps that also can’t figure this out. A good example here being Zwift.


Below all that you’ve got the ability to convert a Favero Assioma Duo into an Uno, as well as make an Uno a Duo. Then you’ve got three more options most folks won’t use:

A) Static weight test: This is if you have a calibrated weight, to validate the calibration of the power meter.

B) Travel mode: This will put it into a mode that shuts down the pedals entirely, but requires you connect a charger to wake it back up. I’d generally *strongly* recommend against this. The reason is that there’s an approximately 110% chance you’ll put your pedals into this mode thinking you’re clever while packing your bike bag for a race. However, later that evening you’ll forget to grab your charger. You’ll thus arrive at your race unable to wake up your pedals, making yourself screwed. I mean, that’s just me. Maybe you’re smarter or somehow more organized (in which case you’ll forget your charger at the race hotel, screwing yourself for when you get home a few days later). Don’t get me wrong, I do appreciate Favero adding this feature. But like a McDonald’s gift card, it’s only a recipe for trouble.

C) Automatic Standby: This is below the travel mode, and allows you to change the automatic standby feature. By default it’ll go to sleep after 5 mins, and then wake-up again immediately upon pedaling. This saves batteries for café stops and such. However, if you’ve got a really finicky bike computer that doesn’t properly re-connect to sensors after a café stop, then perhaps you’d increase this timeout (at the expense of battery life).

And finally, to update firmware, you’d tap on the firmware tab, which, does exactly what you’d expect. It takes a couple of minutes, and updates the firmware via Bluetooth Smart. Favero has released numerous firmware updates over the years for their existing Assioma pedals, though that pace has slowed as the product has reached market feature maturity.


Ok, so with all those things covered, we can get it paired up to our bike computer. Pretty much any brand will work with the Favero Assioma pedals. I’ve used them successfully and without issue with almost every bike computer out there, though the features will vary based on the bike computer. For example, at the ‘low end’ of Favero features you’ve got the Suunto 9 Peak I was using last night. That covers the basics of power, but not things like left/right balance.

Then, you’ve got the Wahoo BOLT V2, also used last night. That does show left/right balance, but doesn’t record attributes like Cycling Dynamics, which Favero transmits. Finally, you’ve got the Garmin series of devices, like the Edge 1030 Plus I further also used last night, which records all the other stuff, plus Favero’s variant of Cycling Dynamics.

For fun, we’ll pair it up to a Wahoo BOLT V2. To do so, go into the sensors menu and search for sensors. It’ll come back and find a power sensor (or, many in my case). You can see the POWER 6624 listed, which is the ANT+ ID of the Favero pedals, so I’ll tap Save.


Once I’ve got that done, you’ll see the details of the power meter, including connection type (ANT+), the ID (6624), and the crank length properly enumerated. As a general rule of thumb for power meters, you should always pair via ANT+ over Bluetooth Smart, if able. The power meter spec is far more mature on ANT+ than Bluetooth Smart for data field types, where most advanced pedaling data metrics for most power meters simply don’t exist over Bluetooth Smart (regardless of which bike computer you use).


On any bike computer you’ll be able to calibrate it, and you can see here when I do that I get back a success response of ‘0’ and that it’s complete.


Since we’re on the BOLT, here’s what the power looks like while pedaling along. In this case I’ve configured some 30-second data fields, as well as left/right balance.

Meanwhile, if we switch over to the Garmin Edge 1030 Plus, and set it for the Cycling Dynamics data page, you can see some of the Cycling Dynamics data, specifically the ‘Power Phase’ data, shown at the top and bottom of the page, as well as the left/right breakouts. All of this is recorded to the data files.


By default, Favero transmits this first set of ‘normal data’ to basically every bike computer/app out there:

Power (Total): Your total power being transmitted – e.g. 227w (via ANT+ & Bluetooth Smart)
Power (Balance, left/right): Your power balance between left and right side – e.g. 46%/54% (via ANT+ & Bluetooth Smart)
Cadence: Your pedaling revolutions per minute – e.g. 94rpm (via ANT+ & Bluetooth Smart)
– Torque Effectiveness: How much of the pedal stroke is actually contributing to going forward (versus lifting up on the pedal) – i.e. 74% (via ANT+)
– Pedal Smoothness: How smooth your pedal stroke is all the way around – i.e. 82% (via ANT+)

However, in addition, almost two years ago to the day, they added ANT+ Cycling Dynamics to their Favero Assioma pedals too. At present, only Garmin supports it (though other ANT+ manufacture members can certainly add it).

The ANT+ Cycling Dynamics spec allows for three additional pieces of data, for which Favero has implemented two of them:

Platform Center Offset (PCO): Not implemented on Favero Assioma
Power Phase: Yes, implemented on Assioma
Rider Position: Yes, implemented on Assioma

And again, to see any of this, you’ll basically need to be on a Garmin device. While Wahoo has implemented advanced pedaling metrics for Pioneer power meters, they don’t save the data, nor is that ANT+ Cycling Dynamics. Maybe now that Pioneer is dead, they’ll switch over. Or, maybe not, since they’ve got their own pedals coming out.

Now, after a ride you’ll be able to see this additional Cycling Dynamics data on Garmin Connect (or the mobile app), it won’t show up on sites like Strava. You can look at my ride from last night as an example.

At the top section of the graphs you’ve got cadence, then the seated/standing position (the neon green bits are me standing, blue is seated). Followed by wattage and left/right balance.


Then below that, you’ve got the platform center offset. Except Favero doesn’t transmit this, so these will be ‘0’ across the board.

After that, there’s power phase, which can show both the start/end as well as peak power by selecting the drop-down.


All of this data you can dig in more deeply if you want from a charting standpoint by expanding it and zooming/etc…

Down below further is a pile of summary data:


And then you can also tap on the ‘Cycling Dynamics’ tab to view summary info there too, with pretty graphics. Except PCO won’t show up, because PCO isn’t on Favero Assioma pedals.


I won’t re-hash how (or how not) to use Cycling Dynamics data on Favero Assioma’s, as I already wrote a long post on that here you can reference.

When it comes to charging, the Favero Assioma pedals use rechargeable batteries that are built into the pods themselves.  You’ll see the small contact points on the outer edge of the pod:

The USB-based charging connector then magnetically snaps onto these. It fits quite nicely, and illuminates once charging. Favero advertises 50 hours of battery life per charge. That seems plausible to me. I honestly don’t track my total battery hours on bikes that closely, especially since I’m often moving them around for photos/videos/etc… In general my gut check here says ‘sure, sounds fine’ (along with my gut chuck on using Favero Assioma pedals for four years otherwise).

In any event, the two charging cords connect to the dual-USB port power outlet. The cables are nice and long, so it’s easy to charge them while still on the bike.

Also – I’ve seen some concern about what happens when the batteries ‘die’, apparently in reference to how you might swap them out.  Some of this is due to misunderstandings about how rechargeable batteries die.  First off is that batteries are generally rated to a certain number of recharge cycles, in the case of the Assioma battery, that’s estimated to be about 500 cycles (per an e-mail from Assioma).  Once it reaches that number, they don’t stop working.  Instead they might slowly degrade, perhaps to 80% of battery capacity.  With an example battery life of 50 hours, and the 500 recharge cycles, that puts you at 25,000 hours of battery life before it starts to degrade.  That’s 24 years of riding 20 hours per week.  Or almost 50 years if you rode 10 hours per week.  Seriously, you’ll have long moved onto something else by then.  Battery cycle time is not your concern here.

Finally, a brief note about the pod durability.  The pods are internally sealed with a resin, which protects everything inside of them.  In my Favero BePro review nearly 6 years ago I noted that in the couple months I used my set then, that the outer shell got damaged and I was concerned about long-life durability.  Thankfully, that turned out not to be an issue, and I don’t believe I’ve received a single complaint about that being an issue for the BePro units.  And with Assioma, breaking of the pod is virtually unheard of.


The main issue at this point, in 2021 – is that there’s a pod at all. Obviously, four years ago we had this discussion when the Assioma came out, given that neither PowerTap or Garmin had pods then. Fast forward a few years and SRM doesn’t have pods either. I think it’s a valid criticism that in four years since Assioma’s have come out, the spindle is identical to back then and the pod is still there. While Favero has come out with various firmware updates (like the Cycling Dynamics), I think a lot of people were sorta hoping to see that pod design go away, given the advances in technology.

Nonetheless, there’s something to be said for reliability and a known quantity – for which the Shimano variant of Assioma delivers upon.

Power Meter Accuracy:


I’ve long said that if your power meter isn’t accurate, then there’s no point in spending money on one.  Strava can give you estimated power that’s ‘close enough’ for free, so if you’re gonna spend money on something, it shouldn’t be a random number generator.  Yet there are certain scenarios/products where a power meter may be less accurate than others, or perhaps it’s got known edge cases that don’t work. Neither product type is bad – but you just need to know what those use/edge cases are and whether it fits your budget or requirements.

As always, I set out to find that out.  In power meters today, one of the biggest challenges is outdoor conditions.  Generally speaking, indoor conditions are pretty easy to handle, but I still start there nonetheless.  It allows me to dig into areas like low and high cadence, as well as just how clean numbers are at steady-state power outputs.  Whereas outdoors allows me to look into water ingest concerns, temperature and humidity variations, and the all-important road surface aspects (e.g. vibrations).  For reference, the Favero Assioma DUO-Shi has a claimed accuracy rate of +/- 1.0%.

In my testing, I generally use between 2-3 other power meters on the bike at once.  I find this is the best way to validate power meters in real-world conditions.  For the final set of production pedals, I was using these other power meters or trainers concurrently in two main configurations:

Outdoor Testing Config (Canyon Ultimate CF SL)

– Favero Assioma DUO-Shi
– Quarq DZero power meter
– PowerTap G3 hub power meter (when outdoors)

Indoor Testing Config (Canyon Ultimate CF SL)

– Favero Assioma DUO-Shi
– Quarq DZero power meter
– JetBlack VOLT Smart Trainer

But the reality is I’ve literally got data sets over the last year comparing against:

– TrueKinetix TrueBike (April-May 2020)
– Tacx Flux 2.1 (July 2020)
– Wahoo KICKR V5/2020 Trainer (August 2020)
– And many more outside sets (July 2020 – June 2021)

First off, indoors. Starting off with something relatively straightforward, an ERG workout with various intervals at three main intensities, including 30-second sprints. In this workout I’m looking for stability of the power, as well as lack of drift. A workout like this makes it easy to spot drift (such as temp drift), since you’d see things start to differentiate from start to finish. In any case, here’s the data set:


As you can pretty easily see, that looks super crispy good. The data sets are very closely aligned between the units (Quarq DZero crankset and the JetBlack VOLT). One might argue the JetBlack should be a hair bit lower, but in the context of the Favero Assioma that’s not really the focus.

If we look at the intervals where the trainer jumps up quickly, the Favero reacts instantly, and also correctly shows when I wasn’t paying attention at the start of an interval – as you see a bit of an oscillation there. That’s real. And, interestingly, also shows where the JetBlack applies a touch bit of ‘ERG Smoothing’ to make it look like those don’t exist. But in this case, the Quarq & Favero power meters accurately show the truth (my inattention, causing the little blip, since my legs weren’t ready for it).


Here’s another example a few interval chunks later, again, every unit is very close here, with the slight timing differences between sets mostly owed to the nuances of multiple devices and recording rates. Note however on the middle interval below, I was really focused on it, and there isn’t any sort of blip/wobble in my power. This obviously has absolutely nothing to do with accuracy, except to show how sensitive power meters can be.


In terms of cadence, I haven’t seen any variations at all here with the DUO-Shi units. These mirror the Quarq, and even the JetBlack mirrors it. In fact, across both sets I’ve had for the past year, cadence has been absolutely spot-on.


Next, we’ll dive over into simulation mode for a ride on Zwift. In this case, I’m starting off the first 30-35 minutes in a large group at a relatively consistent wattage, but with any sort of group ride, you get constant micro-fluctuations in wattage, making it fun to see how the different units respond. In particular, some power meters and training can do funky things with that much movement, in terms of how they handle soft-pedaling. Here’s that data set:


As you can see, it’s incredibly similar. Let’s zoom in though on a few random chunks. The first thing I’ll note is that we generally see ‘proper’ ordering, with the VOLT as the lowest power source (since drivetrain losses occur the further away from the foot we get), and the Favero/Quarq the highest. So that’s good.

I notice that the Favero/Quarq units spike together correctly on the sprints, with the VOLT undershooting slightly. That’s somewhat common in many trainers, especially as they try and play ‘catch-up’ on quick surges. But it’s good that I don’t see any delay on the DUO-Shi or Quarq units.


Here you can see just how close all the units are, with only the slight differences from the trainer when I surge, depending on how quickly it is that I surge (some surges the trainer is fine, others it’s a bit latent).


If we look at this 800w sprint (keeping in mind this multi-second average graph is smoothed, so the actual value is higher), you can see it’s actually rather close to the Quarq. Whereas the Favero overshoots a bit higher. In any sort of sprint effort, it’s often rather difficult to know exactly which one is actually correct.


Meanwhile, cadence is virtually identical across the board again on this, save the handful of times for the trainer with estimated cadence and it briefly recovering on a sprint (or rather, the afterglow of the sprint). But again, zero issues from the Assioma here.


Ok, let’s head outside. Frankly, these sets are going to be boring. Here, let me do this backwards and instead just show you the mean-max graph for this ride from a few weeks ago (against a Quarq DZero & PowerTap G3):


It’s incredibly close between them, and the data point shown/highlighted there is the 30-second one, but as you can see, the three plots are very close (though, perhaps too close in one way, more in a second). Here’s the actual ride data:


Again, excruciatingly close here. The only nitpicking I’d have at this stage is that the PowerTap G3 is probably a smidge high, and the Favero a touch low. But this was after swapping bikes, so things might not have been fully settled yet (and in fact, the trainer rides later firm up nicely).

If we zoom in on a few different moments, you can see the slight variations between multiple bike computers/power meters in terms of recording/transmission rates, but these are super close for what is a multi-surge effort here:


Really nothing super exciting or problematic here:


Cadence is clean too. You’ll see the dips in the green graph of the PowerTap G3, as that’s an estimated cadence, and isn’t particularly great at surges for cadence estimation.


But again, things look very close here.

So, let’s switch to one last set from last night, this was a nice warm sunset ride, where the temperature slowly cooled down – great for catching any drift issues. Also, for fun, I recorded the Assioma across three different devices too (Wahoo BOLT V2, Garmin Edge 1030 Plus, Suunto 9 Peak), to catch any recording quirks there. Here’s that data set:


Note that you’ll see slightly different numbers at the bottom, due to the slightly different recording/transmission timings of each unit. But, the Mean-Max graph shows a much better picture of things – which is to say, it looks nearly identical.


If we take a look at a few spots, here’s a sprint, smoothed at 5-seconds. You can see all the units travel together fairly well, though oddly we see the data from the Suunto 9 Peak a bit more quirky. That’s because the Suunto 9 Peak (like all Suunto units), only pairs to a single side of this duo, and thus we’ll see variations based on left/right balance, unless I specifically toggle the single-channel option (which, I did not).


Still, these are very tight graphs across the board here. Again, if I were to nitpick anywhere, it’s that the G3 should be a tiny bit lower (a couple of watts, given drivetrain losses), but I think I just need to get this G3 hub in for its usual maintenance.


And cadence looks good here too.


There’s little reason to keep on showing more and more data sets. The data is spot-on for me, and replicates what I and many others have seen on the Favero Assioma units over the years. Given this is the same spindle (meaning, it’s the same thing), I figured it’d act the same. But as usual, I validate and verify it’s actually the same. Thus far, things look solid. And by ‘thus far’, I mean over a year’s worth of riding.

(Note: All of the charts in these accuracy sections were created using the DCR Analyzer tool.  It allows you to compare power meters/trainers, heart rate, cadence, speed/pace, GPS tracks and plenty more. You can use it as well for your own gadget comparisons, more details here.)



In a lot of ways the Favero Assioma DUO-Shi pedals remind me a bit of what Watteam did a few years back: Offer a cheaper product in exchange for you being the assembly factory. In other words, if you look at Garmin’s SPD-SL based product, Rally, they charge a premium for a completely assembled/supported product (among other reasons it’s premium priced, like also swapping to SPD MTB and LOOK KEO, etc..). Whereas Favero charges some $400-$500 less, but you need to source the extra parts/tools/time to complete before installation. For some folks, that’s a no-brainer trade-off. Whereas for others, the catches are less appealing.

Of course, the key difference to my Watteam harkenings is that Favero’s product isn’t fiddly and dependent on your ability to fill up water bags, and more importantly, Favero has a strong history of accuracy in their units. All three iterations of Favero pedals I’ve tested over the years (BePro, then Assioma, and now Assioma DUO-Shi) have been accurate. And not just me, but a lot of people too. I routinely use them as power meter reference devices. They’re just as accurate as the Garmin Rally pedals (really, it’s a wash in my brain).

Point being that if the assembly and q-factor limitations aren’t an issue for you, then the Favero Assioma DUO-Shi pedals are a solid option to consider when looking at power meters. Which yes, reminds me again I need to do anther power meter round-up, now that we’ve finally got some new power meters this year. Though ironically, almost everything new released this year is merely a rebrand of existing products with the same spindles. So…same same, but different. 🙂

With that – thanks for reading!

Found This Post Useful? Support The Site!

Hopefully you found this review useful. At the end of the day, I’m an athlete just like you looking for the most detail possible on a new purchase – so my review is written from the standpoint of how I used the device. The reviews generally take a lot of hours to put together, so it’s a fair bit of work (and labor of love). As you probably noticed by looking below, I also take time to answer all the questions posted in the comments – and there’s quite a bit of detail in there as well.

If you're shopping for the Favero Assioma DUO-Shi (Shimano) Pedals or any other accessory items, please consider using the affiliate links below! As an Amazon Associate I earn from qualifying purchases. It doesn’t cost you anything extra, but your purchases help support this website a lot. Even more, if you use Backcountry.com or Competitive Cyclist with coupon code DCRAINMAKER, first time users save 15% on applicable products!

And of course – you can always sign-up to be a DCR Supporter! That gets you an ad-free DCR, access to the DCR Quarantine Corner video series packed with behind the scenes tidbits...and it also makes you awesome. And being awesome is what it’s all about!

Thanks for reading! And as always, feel free to post comments or questions in the comments section below, I’ll be happy to try and answer them as quickly as possible. And lastly, if you felt this review was useful – I always appreciate feedback in the comments below. Thanks!

Found This Post Useful? Support The Site!

Hopefully you found this review useful. At the end of the day, I’m an athlete just like you looking for the most detail possible on a new purchase – so my review is written from the standpoint of how I used the device. The reviews generally take a lot of hours to put together, so it’s a fair bit of work (and labor of love). As you probably noticed by looking below, I also take time to answer all the questions posted in the comments – and there’s quite a bit of detail in there as well.

If you're shopping for the Favero Assioma DUO-Shi (Shimano) Pedals or any other accessory items, please consider using the affiliate links below! As an Amazon Associate I earn from qualifying purchases. It doesn’t cost you anything extra, but your purchases help support this website a lot. Even more, if you use Backcountry.com or Competitive Cyclist with coupon code DCRAINMAKER, first time users save 15% on applicable products!

And of course – you can always sign-up to be a DCR Supporter! That gets you an ad-free DCR, access to the DCR Quarantine Corner video series packed with behind the scenes tidbits...and it also makes you awesome. And being awesome is what it’s all about!

Thanks for reading! And as always, feel free to post comments or questions in the comments section below, I’ll be happy to try and answer them as quickly as possible. And lastly, if you felt this review was useful – I always appreciate feedback in the comments below. Thanks!

Sours: https://www.dcrainmaker.com/2021/07/assioma-shimano-variant.html

Power meter favero

Favero Assioma DUO Power Meter Pedals

Favero IAV Power Technology

The Assioma uses Favero’s IAV (Instantaneous Angular Velocity) Power. Using special software and a built-in three-axis gyroscope, IAV takes into account the precise pedaling speed within each pedal stroke. This results in the Favero Assioma DUO having accuracy of +/- 1.0%. In addition, IAV allows you to use the Assioma pedals with oval chainrings without any impact to the accuracy of your data!


Favero IAV Cycling DynamicsFavero Assioma IAV Cycling Dynamics

Favero’s gyroscope also allows you to measure cycling dynamics data. IAV Power Phase displays the portion of your pedaling stroke in which torque is produced. In addition, your Power Phase Peak, in which maximum torque is produced, is also indicated. IAV Rider Position displays the portion of time you are in a seated vs. standing position. This allows you to analyze how a specific position can influence your performance. This data works with most Garmin bike computers including the Edge 1030, 830, 820, 530 and 520 Plus.


Now with Auto-Zero!

The pedals now have auto-zero. With this feature, the power meter will perform an automatic zero-offset (calibration) every time you ride, which helps ensure the power meter stays accurate!


Updated Spring Tension

Favero changed the spring in order to have a wider release torque tension and these pedals come with the new spring. The new spring’s release torque tension has been lowered from 11Nm to 8Nm. Therefore, the pedals are now easier to clip in and out of.


Favero Assioma DUO Pedal Cleats

The Favero Assioma DUO Power Meter Pedals come supplied with red, 6-degree float cleats. You also have the option to purchase black, 0-degree (fixed) float cleats. If you have LOOK KEO cleats, they will also work with the pedals.


Tools Needed for Installation

  • All tools required for installation provided in the box


In the Box

  • Left pedal with sensor
  • Right pedal with sensor
  • 1 set of red 6-degree float cleats
  • Battery charger including plugs (EU, US, UK, AU)
  • 2 two-meter micro-USB cables with magnetic connectors
  • 1 hex key and 4 washers
  • User’s manual


Favero Assioma DUO Power Meter Specs

Sours: https://powermetercity.com/product/assioma-duo-power-meter-pedals/
Favero Assioma DUO-Shi Power Meter: Shimano SPD-SL Road Pedal Compatible

Favero Assioma Duo power meter pedal review: simply great

Power meter pedals have been around a fair while, but only in recent years have they got to a point where I’d want them on my own bike. Gone are the separate external pods which make installation tricky, or the bulky pedal bodies ready to scrape the tarmac – now there are a handful of truly classy and reliable options.

One such example is Italian company Favero and its Assioma pedals. I’ve played with these unassuming pedals off and on over the years (they were first released in 2017), but I had never previously spent a huge amount of time on them. And while the accuracy has already been proven by others, I just wanted to know how they functioned as actual, well, pedals.

TL;DR? These things are impressively good.

A quick primer

Story Highlights

  • What: Single- or double-sided power meter pedals that use the Look Keo cleat system.
  • Weight: 304 g (Duo, pedals only)
  • Price: US$664 / AU$1,100 (Duo version, as tested)
  • Highs: Simple to install and set up, reliable, easy to service, low weight, well priced, weather sealed.
  • Lows: Power pod around spindle looks clunky; they need to be registered before they’ll work; locked into a cleat system; proprietary charging plug.

Much like Garmin Vector 3 or SRM EXAKT power pedals, Favero offers its Assioma pedals with either one-sided or dual-sided power functionality. In either case you get a pair of pedals, but the cheaper Uno (US$425 / AU$640) simply provides measurement on the left only (and doubles the measured power), while the Duo (US664 / AU$1,100) offers a truly independent left and right power measurement. Favero does offer the option to upgrade the Uno pedals to a Duo down the track, but of course, it’s more cost-effective to do so upfront if you’re keen on dual-sided measurement.

Like other power meter pedals, the Assiomas are intended to replace your existing pedals and work with a three-bolt road shoe. The pedal body is made by pedal specialists Xpedo and uses Xpedo’s own “Thrust” cleat, closely based on the Look Keo cleat format. Look Keo cleats do work in the pedal, but provide a subtly different, looser, feel.

Unlike a number of other power meter pedals, the Assiomas fit all the electronics into a factory-fitted small pod that surrounds the external part of the spindle. This isn’t as aesthetically pleasing as fully concealed options from the likes of SRM/Look and Garmin, but it does mean the pedal body, spindle and bearings are effectively no different from a standard pedal. More on this later.

Weight-wise the Assioma Duo is 304 g for the pair; adding cleats (including hardware) brings the total system weight up to 384 g. By comparison, a pair of Keo Max Carbon pedals weigh 312 g with cleats and hardware, while a pair of Shimano Dura-Ace R9100s are 305 g – and neither of those features a dual-sided power meter. A fairer comparison is the Garmin Vector 3, but those are 322 g sans cleats (which are also a Look Keo-type).

The pedals feature both ANT+ and Bluetooth connectivity and are claimed to be within +/- 1% accuracy thanks to a series of eight strain gauges within each pedal pod. Each power meter pedal features its own rechargeable Lithium-Ion battery, which uses a proprietary method for charging. The pedals are said to be entirely waterproof.

Setup, firmware updates, and calibration are all done wirelessly through Favero’s own phone app.

What’s in the box

In both cases, the pedals come enclosed in a classy cardboard box with multiple layers to store the number of included accessories.

Taking up much of the space is the dual USB power adapter, with a handful of common international power outlet plugs provided. Even Australia is covered. The Dual USB adapter works with the provided charging cables, and in the case of my Duo pedal sample, two cables were provided.

The USB cables themselves are each a generous two meters in length so you don’t have to get too creative in how you charge these. At the end of the cable is a unique magnetic induction plug that attaches to the outside pods of the pedals. Just align it with the connection points on the pedal and you’ll feel the magnetic attraction. It’s dead simple.

Favero includes a pair of Xpedo’s Thrust 6º-float grip cleats with a standard three-bolt hole pattern. There are plenty of other cleat options available if you’d like a different float figure.

There’s a handful of steel pedal washers provided, only needed if the plastic power pod touches the crank arm (one washer per pedal will likely be needed for most). And finally, Favero even includes a lengthy 8 mm hex key for install and removal of the pedals. And yes, a paper manual is provided, too.

The easiest of installs

Ever installed a regular Shimano, Look or similar pedal? Then you already know how to install the Favero Assioma. Favero simply requires you to install the pedals with an 8 mm hex key, and they’re not overly fussy about tightening torque, either. Don’t forget the grease on the threads.

Such a simple process makes these an ideal choice for swapping between bikes. However, you’ll need to pay attention to the clearance between the power pod and your crank arm (and use pedal washers where needed; I needed one per pedal), but that’s pretty much it.

I tend to test electronic devices somewhat blind, and will see how intuitive something is before reaching for the manual. Favero did stump me here — despite the pedals connecting easily to my head unit, they wouldn’t transmit power or cadence figures. That was until I registered them through the company’s phone-based app, something the manual clearly states must be done in order for the pedals to function. I understand the data collection and warranty-based reasons for this approach, but it’s still a little silly.

The setting of crank arm length can be done through either your head unit or via Favero’s app, while the former will handle the zero-reset if you choose. Like many of the latest power meters, these pedals are factory calibrated and automatically adjust to changes in temperature.

And speaking of the app, generally, it was easy and intuitive to use, but I did have an issue with updating the pedal firmware at the start. The firmware has to be updated independently on each pedal, and I hit some snags where it would drop the connection (on an iPhone) between updating the left and right pedals. A couple of phone resets later and I eventually got there. It’s been blissful since.

Accuracy and longevity

A power meter is only worth having if it meters power accurately and consistently, and thankfully the Favero Assiomas do just that. From connectivity, to live response rate, to post-ride data, the Favero Assioma pedals gave me no concerns at all.

Whether it was a Garmin, Wahoo, Bryton or Lezyne head unit, the Favero pedals were easily discovered and stayed as such. Likewise, when I put in a strong effort, the figures on my head unit would jump quickly. The left/right balance was equally as fast, and the cadence was always spot on, too.

In addition to all the usual power and cadence metrics, the Assioma’s pedals offer pedal smoothness and torque effectiveness figures (achieved with what Favero calls instantaneous angular velocity measurement, something that also means the Assiomas can be used reliably with oval chainrings). The likes of the Garmin Vector 3 feature some even more detailed measurements, but honestly, I’m yet to meet anyone using such data with purpose.

I’ve ridden plenty of power meters over the years, some great, some problematic, but admittedly testing these things isn’t what I do day in and day out. And so as mentioned at the start of this review, I left the accuracy judgement to others. Ray of DCRainmaker tested the Favero Assioma Duo pedals and found zero issues in the accuracy and repeatability of the data. Since then, YouTube’s GPLama (Shane Miller) often uses these same pedals to benchmark others.

Of course, simply benchmarking one power meter against a handful of others doesn’t ensure absolute accuracy, but short of a lab-based bench test (which we’ve tried to pull off in the past, and continue to look into), these comparative tests are the most trustworthy information we have.

The internal batteries are not at all user-replaceable — in fact, they’re welded in place beneath a waterproof resin filler. However, I don’t believe this will ever be a factor in getting your money’s worth from the pedals. The battery is claimed to last 50 hours of riding between charges and said to retain 80% of its capacity after 500 recharges. And from what I’ve experienced I have no reason to contest these claims.

The pedals use an internal accelerometer to automatically switch themselves on and off with movement. Transporting your bike is likely to keep the little LEDs flashing, and while it’s of little concern for a drive to a nearby event, it’s worth keeping in mind for longer road trips or flights. For this (and reasons of frequency transmission), the app offers a flight mode for the pedals. (Edit: Do note that you’ll need a charging cable in order to wake the pedals up again.)

When the pedals do give you a low battery warning, you still have a generous eight hours before they’ll shut themselves off. And as touched upon, charging these pedals couldn’t be simpler with no weak pin connectors or port covers to contend with – just a simple magnetic contact charger. Worth mentioning is that Favero’s charging plug uses a Micro-USB interface, and so you can pack a far smaller cable and/or share it with other devices if you’re travelling.

How they are as pedals

Ok, so how are they as actual pedals?

It’s a critical question, and in my mind, a power meter pedal is only worth owning if the pedal itself doesn’t introduce compromises. The compromises may have been small with previous pedal-based power meters, but they were certainly present, which kept the door open for crank- and chainring-spider-based power meters to rule the roost.

Ok, so a quick bit of backstory. I used to use Look Keo pedals on my personal bikes before turning to Shimano SPD-SL. At the time, the Keo pedal bodies would suffer surface wear and lead to off-plane rocking at the cleat. And while the French company has fixed this issue with a steel surface plate, many of their pedals eventually suffer from bearing wear that’s not all that easy to solve. I’ve said it multiple times before, but it’s tough to beat Shimano’s offerings when you consider the bearing durability, reliability, ease of walking, and pedal stability.

And so when it came time to test these pedals I had my concerns. Would the power meter pod impact Q-factor? How would the clip-in action be? Would the cleats squeak? And what can be done when the bearings inevitably wear out?

Starting with the first question, the Assioma pedals are wonderfully normal in their form factor and measurements. The pedal width from spindle to centre of the pedal body is 54 mm, something that’s closely comparable to regular Look Keo Carbon and Blade pedals which sit at 53 mm. Shimano R9100 and R8000 pedals are 52mm wide (Shimano also offer models with a 56mm figure).

The stack is a little trickier and each brand has a different method for measuring theirs. Favero measures it as 10.5 mm from the centre of spindle to where the cleat touches the pedal body. By comparison, Shimano’s lowest stack road pedal (R9100) is 8.8 mm when measured the same way. Now obviously we’re talking about a millimetre here and there, and while that may be a deal-breaker for some, others would never know even if you put a ruler in their hand. The change didn’t bother me.

The cleat-pedal interface is secure and I didn’t miss my Shimanos while spinning circles with the Favero pedals. The Assiomas measure just 4 mm narrower across the pedal body/cleat interface. Likewise, the pedal holds with comforting security, and there’s a good adjustment range to the release tension. And better yet, those Xpedo cleats showed no creaking or squeaking issues on the pedal body surface.

Clipping in is much the same as Look Keo pedals but is a little trickier than what Shimano manages with a larger, deeper hook on the front of the cleat. The free-spinning bearings ensure the pedals hang with the front clip facing up, so it’s at least easy to locate the correct pedal side.

I certainly missed my Shimano cleats once off the bike — whether they’re made by Xpedo, Exustar or Look, the Keo-compatible grip cleats are never as nice to walk in. It’s a complaint that applies to almost all power meter pedals currently on the market.

No different to the Xpedo NXS pedal, the Assiomas spin on three sealed cartridge bearings which can be replaced if wear occurs. I stripped my pedals down using 6 and 8 mm hex keys, a thin 9 mm socket, and a seal pick. And even that last tool could be subbed for a small flat blade screwdriver. And while they surely won’t last as long, these bearings allow the pedals to spin with even less resistance than well-greased Shimano Dura-Ace pedals.

Most importantly, that servicing can be done cheaply (a kit is US$39) and without any impact to the enclosed power units. This is a key point of difference to some other power meter pedals on the market which either have more detailed service kits and/or need to be returned for such upkeep.

Even better, Favero sells replacement pedal bodies (US$58) if you were to wear out or damage one. And given what that pedal body is, there have been a number of successful reports of people installing SPD-compatible versions of Xpedo’s MTB pedals straight onto Favero’s power-enabled spindles.

What else to consider

I went into this test knowing the Favero Assioma had a proven reputation, but I still had questions of my own. Half a year later I’m impressed that such a technical product can be so simple and reliable to use. So am I buying these to replace my beloved Shimano SPD-SLs? Well, no. I have a few too many pairs of Shimano pedals and a few too many bikes on the go to make a switch to a different cleat platform. I’m sad to be sending these back, but at least for now, this pedal-based power meter isn’t the ideal option for me.

Convinced a pedal-based power meter is right for you? Well, of course, there are other options to consider. Garmin’s Vector 3, Look/SRM EXAKT, and Quarq Powertap P2 are all direct competitors which sell for US$1,000 / AU$1,500, US$1,700 / AU$2,195, and US$899 / AU$1,000 respectively (all dual-sided versions). And while they each have their benefits, many require more difficult servicing, have throw-away batteries to swap on occasion, or need more expensive replacement parts. And picking one of these other options over the Favero only gets more difficult when you consider the prices. As a reminder, the Assioma Duo retails for US$664 / AU$1,100.

The Favero’s external flashing UFO-like power pods may not be to everyone’s aesthetic tastes, but if that doesn’t bother you then it’s hard to do better here.


Sours: https://cyclingtips.com/2020/08/favero-assioma-duo-power-meter-pedal-review-simply-great/

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Favero Power Meters

Additional Information:


Both the Assioma DUO and UNO are a breeze to install. Simply grab an 8 mm hex wrench and screw them on – just like a normal pedal. The DUO-Shi takes a bit more work as you need to first install the spindles into your Shimano pedal bodies, but it is a very simple process. These power meters can also be moved between bikes quickly and easily.

Before the first ride, Favero power meters do have some one-time set-up steps such as registering them with the app taking a quick ride to set the installation angles. Its easy stuff and is outlined in the manual so be sure to give it a quick read.


Favero power meters are the lightest power meter pedals available. The DUO and the UNO weigh in at 149.5 grams per pedal. The DUO-Shi weighs 157 grams in a Shimano PD-R8000 pedal body. This is only slightly heavier than a standard road pedal.

Power Measurement

The Assioma DUO and DUO-Shi measure both legs and also measure left/right leg power. This means it can tell you how much power each leg is generating individually. The Assioma UNO measures left leg power and like all left-side power meters, doubles the left leg value to give you total power.

Special Features

The Favero power meters are the only ones with IAV (Instantaneous Angular Velocity) Power. This special software and integrated three-axis gyroscope results in accuracy of +/- 1.0%. In addition, IAV allows you to use the pedals with oval chainrings without any impact to the accuracy of your data.


Favero power meters use rechargeable lithium-ion batteries. Battery life is around the 50-hour mark, which is good for a rechargeable battery.

Communication Protocol

Favero power meters transmit data via both the ANT+ and Bluetooth SMART wireless protocols. Therefore, they are compatible with just about any bicycle computer. You can also use a smart phone or tablet as your head unit.


Featuring IAV Power Technology, Favero power meters are accurate to within +/- 1.0%. This is on par (to slightly better) than the majority of other power meters on the market.

Cadence Detection

Like most power meters, the Assioma DUO, DUO-Shi and UNO use an accelerometer to measure cadence. This means you don’t have to worry about attaching a magnet to your frame.


Favero power meters come with a two-year manufacturer’s warranty.

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Sours: https://powermetercity.com/product-brand/assioma/

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