How to pick the right aluminum arrow without charts!
Here's the deal: There are only nine arrow spines you need to start off with bows from about 18# to about 100#. (Note that this is an approximation and you’ll see why in a second).
IN GENERAL for 28" ARROWS +/- 1" (27 - 29") and 100 - 125gr heads:
18# - 23# 1516
24# - 27# 1616
28# - 33# 1716
34# - 42# 1816
43# - 52# 1916
53# - 60# 2016
61# - 70# 2117
71# - 80# 2216
81# - 100# 2219+ (Might want to play with 23xx, 24xx and larger shafts as it can get a little dicey at those weights, since bow efficiency starts diminishing after a certain weight.)
If you go to a 30" arrow, jump to the next stiffer spine number, if you go to a 32" arrow, then jump up two spines stiffer. Ditto for going shorter, 26" one spine number weaker, 24" two spine numbers weaker.
For example: If you have a 35# bow and use a 28" 1816, but would prefer a 30" arrow, choose a 1916; likewise going to a 26" arrow would require a 1716.
Head weight will also affect spine, however, it will require 45-50 grains to jump one spine number. For example, if you're shooting a 40# bow and using a 29" 1816 with a 100 gr head, going to a 150 grain head may require you to jump to a 1916.
This WILL NOT give you the perfect aluminum arrow for a given bow. It will give you a tunable arrow, and that's all you need for starters. Once the arrow is tuned, you'll know if you're compensating for a stiff or soft arrow by the tuning requirements. Then you can fine tune arrow choices by juggling wall thicknesses and diameters.
For example, if you have a #41 @ 28" bow and are using a 29" arrow, you'd pick an 1816, right? And that would work. If you find that you have to move the rest/strike plate out a little more than you’d like, then your NEXT set of arrows might be 1914s. They are the same weight as the 1816s, but a little stiffer.
Regarding Fastflight Fight (low mass/low stretch) strings. The difference between Dacron and FF is on the order of 5#, in a worst case scenario, so if the right arrow was chosen in the first place, it should still be within tunable parameters.
In addition, if I know a particular bow, I might suggest an arrow that's not one of the primary spine numbers. A certain #57 bow might work very well with a 2114, for example.
*Aluminum arrow nomenclature: the first two numbers denotes the shaft diameter in 1/64" and the second two are the wall thickness in 1/1000". For example, a 2016 has a 20/64" (or 5/16") diameter and a wall thickness of 16/1000".
For those of you who would like more detailed information, below is a table complied from Easton's aluminum arrow charts, showing the name, spine, weight and grains per inch for each arrow size.
To convert the spine (deflection in inches) to approximate draw weight, divide 28 by the deflection.
For example, an 1816 has a deflection of 0.756",
therefore: 28/0.756 = ~37#, the midpoint of an 1816's acceptable weight range.
Note that Easton does change their offerings from time to time, and therefore some entries may no longer be available and some new additions may not be listed.
|Shaft||Spine Size (inches)||Weight (grains)||Weight (gr/in)|
|1214||2.501||142 - 24"||5.92|
|1413||2.036||153 - 26"||5.88|
|1416||1.684||194 - 27"||7.19|
|1512||1.554||157 - 27"||5.81|
|1514||1.370||184 - 27"||6.81|
|1516||1.403||197 - 27"||7.30|
|1612||1.298||170 - 27"||6.30|
|1614||1.153||208 - 27"||7.70|
|1616||1.079||227 - 27"||8.41|
|1712||1.099||181 - 27"||6.70|
|1713||1.044||200 - 27"||7.41|
|1714||0.963||219 - 27"||8.11|
|1716||0.880||261 - 29"||9.00|
The 2007 Easton catalog introduced a new version of their Gamegetter XX75 shafts. Now sporting a black anodized finish, the shafts are available in four sizes, based on their carbon arrow nomenclature. In 2009, the XX78 Superslam (digital) shafts were given a shaft diameter nomenclature as well.
Essentially, a 500 series shaft is identical to a 2016, 400 = 2117, 340 = 2315, and 300 = 2317.
Easton Spine Chart Stiff ??
Hmm, makes a guy wonder.
Almost sounds like an intentional error, in order to sell more arrows.
If you find the arrows you just bought are too stiff for your setup what can you do, besides buy new arrows ?...
-Increase draw weight? (but many shooters used their max draw weight to select the arrows in the first place, and would end up over-bowed and sacrifice form and/or a smooth draw.)
-Move rest, or adjust rest tension? (even if there is enough adjustment in your rest to establish decent groups, you'll be way off-center and will still be relying heavily on your fletching to correct the error. A bare shaft will still plane to the left, and so will one with wet feathers.)
-Increase point weight? (but a lot of newer shooters don't want to do ANYTHING that will decrease speed, even if it means poor arrow flight.)
If you don't want to, or can't, do any of the above to fix the problem, you are stuck with buying new arrows since you can't lengthen the shafts to make them act weaker. Their length could only be changed by shortening them which would only make the problem worse.
If Easton would have made the error in the other direction, causing you to select arrows that were a bit too weak in spine, you would be more likely to be able to adjust for it. Funny how the error is the one that makes us buy more arrows.
Aren't these folks at Easton supposed to be the arrow experts?
It seems they are very smart indeed. More than they counted on archers knowing.
Don't get caught. Buy' em on the weak side.
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Arrow Selection Guide
How to Select Arrows
Once you select your own Bow you will need Arrows to suit it and you.
See this Video of an Arrow Leaving a Bow to see why you need to get the arrow stiffness right.
First find out your draw length: This depends on your arm length and also on where you pullback to and anchor with you drawing hand.
See alsoEaston Arrow Selection Guide
Second work out the pulling weight of the bow at you draw length. The draw weight of the bow will be marked on the bow. Usually on the bottom limb and for a given draw length.
Example: Recurve Bow is marked 30lbs @ 28 " on the bottom limb. Your arrow length when at full draw is 29" . Then you will be pulling more than 30lbs when you pull the bow beyond 28". Usually you can add 2lbs per inch of draw, so for 29" draw that would be 32lbs. If you draw 27"then you will be pulling less at about 28lbs. You can of course use a set of scales to actually measure the draw weight . We have the means to do this inour Pro Shops.
With these two measures Weight of Pull and Length of Arrow, it is time to look at the Arrow Types and Arrow Charts to see which size and typeof shaft will fit you best.
There are arrows made of Fibreglass, Carbonfibre, Aluminium, Wood, and Aluminium/CarbonComposite.
Which one to choose? Here is a brief guide to what most people use and why.
Fibreglass: Robust but heavy: Will take a lot of knocks. Usually used at the Leisure end of archery.
Aluminium: Made from light weight tubing: These make a very good reliable and relatively easy to use arrow for shooting at the short and middle distances outdoors. Also these are used by most people for indoor shooting as they are strong, accurate and reasonably priced. There is a wide range of sizes available to suit almost all sizes of archer and strengths of bow. There are also different models at increasing price. You pay more for increasing hardness of the alloy and better straightness tolerances which in turn provides more accuracy. Aluminium arrows are the most popular place to start with your first bow and when you are shooting the shorter and medium distances.
Choices of Arrows in Aluminium:
Easton Neos : excellent entry level arrow: one diameter of shaft for all different lengths,
Easton Jazz and Tribute Models 75 Alloy: Better arrow : greater shaft hardness and selection of diameters for different lengths and stiffness.
Easton XX75 Platinum Model75 Alloy: Better again: A favourite of many archers good hardness but still able to take some knocks without being too brittle.
Easton X7 Eclipse: Best Hardness and Straightness: The top aluminium arrow.
Easton X23 & RX7 : Big diameter arrows for getting higher scores for indoor competition
Once you are shooting 70m, 90mor 100 yards or more then you should probably think about Carbon Arrows .
Carbon Arrows and Carbon/Aluminium Composite: Light and Stiff with smaller diameter than just Aluminium, this means they go further plus have less side wind drift and the arrows are faster with less rise and fall on the way to the target. Carbon arrows can be a little less forgiving of archer errors and need tuning to the bow well to get good clearance. Used by most competitive archers shooting the outdoor distances . Carbon arrows start at the Entry Level and progress tobetter quality models right through the range to the top level models in Aluminium/Carbon Composites as are widely used in the World Championships and Olympic Games.
Choices of Arrows in Carbon and Carbon /Aluminium:
Easton Inspire 750: Leisure and Entry Level one diameter, one stiffness, Carbon Arrow.
Easton Apollo: Next Step Carbon Arrows in Several Diameters and Stiffness grades( called spine), good for target and field archery. Need to select size from chart .
Easton Carbon One : All Carbon Construction, Step up from the Apollo, in a selection of diameters and sizes with sophisticated components for fine tuning and customising to your needs. Excellent for target and field shooting. Need to select size from chart.
Easton ACC Aluminium/ Carbon Arrows: The Aluminium/Carbon Composite Arrows are the top end range by Easton the worlds top arrow maker. ACC are parallel carbon shafts on a fine Aluminium core and excellent for all distances. Choice of Stiffness and diameter. Need to select size from chart. These are a very popular high end arrow and perform very well.
Easton ACG Aluminium/ Carbon Arrows: Similar to the ACC, parallel arrow shaft using one core tube size, different thicknesses of carbon to provide different stiffness sizes.
Easton ACE Aluminium/ Carbon Arrows: In particular the Recurve Target Archers favourite top of the range arrows. Used for long distance and all outdoor shooting. The Shafts are tapered to the ends and come in a selection of sizes. See Charts. Big range of components.
Easton X10 & x10 Pro Tour Aluminium/ Carbon Arrows: Top of the range arrows; Designed for the optimum result at 70 meters and for Recurve and Compound Shooting.
- Easton Triumph All Carbon Arrows; Big Diameter Arrow for indoor shooting. Limited range of sizes and stiffness only , to suit indoor shooting.
- Easton FMJ Carbon/ Aluminium Arrows; Limited range for Heavy Draw Bows and Compounds, Carbon on the inside.
- Easton Axis Carbon Shafts Traditional Wood look finish 5mm Shafts. For the traditional Bow Shooter
Wooden Arrows: Traditional for Longbow and for Traditional Archers Generally. Starts at the entry level wood arrows and then there is a selection of wood shafts matched to bow weight and arrow length which are available as for Aluminium and Carbon arrows. Widely used by Field Archers ,Longbow Archers, and Traditionalists.
Choices of Arrows with WoodenShafts:
Longshot Economy Wooden Arrows: Two sizes, Small Diameter 5/16 " for lighter weight pull bows ,and Larger diameter 11/32" for heavier weight pull bows. Good for Longbow, Field , Roving..... and as ammunition !
Longshot Wooden Field Arrows: Choice of Two Diameters and a range of Stiffness .
POC Premium Wooden Fletched Arrows: Nicely prepared and selected shafts for matched sets of wood arrows.
POC Elite Wooden Fletched Arrows: Top of the Range Selected Shafts for good arrow match made in sets of 6 or 12.
Longshot Flu Flu Wooden Arrows: Made to set off fast and slow down rapidly. Not usually used in competition shooting but rather for have a go situations, or to stop the arrow travelling any distance.
Comment : You should to make up some of your own wooden arrows to understand about arrows.
The satisfaction of making your own arrows as well as the lesson from making them is worth the effort
The Easton Arrow Chart. Easton are the world leaders in competition arrow making. Eastons Chart covers all the Carbon , Aluminium, and Carbon/Aluminium Composite Arrows that Easton produce. It also is a guide to the stiffness needed to get your arrows to fly from your bow even for non Easton Arrows. This can be done by looking at the range of 'Spine' number for the arrow most likely to suit your bow and arrow length. Spine is a numerical stiffness measure which is applicable to all arrows.
For Wooden Arrows there is a different chart on the pages for the Wooden Arrows but the principle is the same.
Using the Easton Arrow Chart
It is not as complicated as it first appears.
Example: You have a recurve bow with a weight of pull of 32 lbs at your arrow length of 26".
-Go to the Easton Chart where it is headed YOUR ARROW LENGTH FOR TARTGET.FIELD.3D
-Go along the top row to 26" and select that column
-Go down the right hand side to 32 lbs, to select that line
-See where Column and Line intersect at a box. In this case Box T2
-Now go to the Box T2 below where there are the Arrow Types ,
The T2 Box lists all the arrow types for you to choose from. If for example you want a good aluminium arrow like Platinum xx75, then the 75 alloy arrow size is shown as1716 for this T2 Box. So 1716 is the arrow size you need. You can choose any of the 75 Alloy arrows and they will suit your bow weight and arrow length. You can also see the size of arrow in other arrow types. If you wanted Carbon arrows, in the same T2 Box there are the sizes for each of the carbon arrow types that will suit your needs and be the equivalent to the 1716 75 Alloy arrow.
If you want further guidance please give us a call.
Carbon Arrow Spine Charts & Deflection Data
ARROW SPINE CHARTS
SIMPLIFIED ARROW SPINE CHARTS` Some arrow manufacturers have very complex charts which take many variables into account. But other arrow manufacturers offer a more simplified chart with an arbitrary number system, like the sample chart on the right which just references draw weight and arrow length. If you go by the simple chart method, then you'll need to apply a little common sense - particularly if your bow setup isn't exactly 'average'. For example, if you shoot a typical 310 fps compound bow, with normal 100 gr tips and 75% let-off, the simplified chart works fine. If you know your bow is set for 60# and you use 29" arrows, you just follow the dots on the chart and choose the 2000 spine size. Easy! But what if you shoot a very aggressive speed-bow with a 350 fps IBO Speed? In that case, your bow will have more output than the average 60# bow. You might need to accommodate by choosing a little stiffer spine like the 3000 shaft, right? And what if you prefer a heavier 125 grain tip, what then? We appreciate the easy reference of simplified charts, but they're not always the best utility. If you would rather not use the simplified method, then we suggest you get to know the concept of actual spine deflection. And don't worry. It sounds a lot more complicated than it is.
WHAT IS ACTUAL SPINE DEFLECTION? There is a difference in an arrow's published spine size and the arrow's actual spine deflection. Published spine sizes can be anything (a number system, color codes, letters of the alphabet, etc.) but an actual arrow spine deflection is expressed as a direct technical measurement. According to the modern standards (ASTM F2031-05) an arrow's official spine deflection is measured by hanging a 1.94 lb. weight in the center of a 28" suspended section of the arrow shaft (not to be confused with the old AMO standard of 2 lb. and 26"). The actual distance the 1.94 lb. weight causes the shaft to sag down is the arrow's actual spine deflection. For example, if a 1.94 lb. weight causes the center of a 28" arrow to sag down 1/2 inch (.500"). Then the arrow's spine deflection would be .500". Stiffer arrows will, of course, sag less. More limber arrows will sag more. So the stiffer the arrow is, the LOWER its spine deflection measurement will be. The more limber an arrow is, the HIGHER its spine deflection measurement will be. Make sure you understand the relationship of spine deflection and stiffness. A lower number is stiffer. Many customers get this backwards. For example, an Easton 340 (.340" deflection) is dramatically stiffer than an Easton 500 (.500" deflection) - not the other way around.
STANDARDIZED SPINE CHARTS BASED ON DEFLECTION` We suggest it is far more reliable to reference the deflection data on standardized charts. These charts are normalized for modern compound bows with IBO speeds between 280-330 fps. For faster bows, read chart one block down and to the right. For slower bows, read chart one block up and to the left. Chart not applicable for traditional bows. Again, please note actual arrow spine deflections do not necessarily match the manufacturer's marketed spine sizes. For example, a "Carbon Express Maxima 250" has an actual spine deflection of .404", not .250" as the sizing suggests. Never assume an arrow's published spine size matches the arrow's actual deflection. Look up the real deflections and base your choice on that.
BASED ON THE GOLD STANDARD
WHY HAVE SO MANY SPINE SIZE SYSTEMS? The next section is technically exhaustive, but worth the read. Once you know about spine deflection measurements, picking arrow shafts will be easy from now on. To understand the issue of arrow spine deflections and why they aren't just standardized, like tire sizes or plumbing fixtures, you must understand something about the history of the arrow industry. The gold standard for rating arrow spine has always been Easton's fitment charts. Before carbon arrows hit their stride in the 1990's, practically every archer in the world had at one time studied the little blocks on the Easton chart, trying to decide if the 2219's, 2413's, or 2315's would be better (remember?). The basic rating system wasn't really hard to understand. The first two numbers were the arrow's diameter (in x/64th's of an inch) and the second two numbers were the shaft's wall thickness (in x/1,000th's of an inch). So a 2315 was an arrow shaft with a 23/64" diameter and a wall thickness of .015". Easy enough. But what did that really mean? The rating system had nothing to do with arrow spine, directly anyway, and the numbering system wasn't necessarily sequential. A 2315 arrow was actually heavier and stiffer than a 2413 arrow. A 2219 was surprisingly heavier than a 2512, but not as stiff. And a 2314 and a 2315 oddly weighed the same but had different deflections. Okay, it wasn't so easy. But Easton's engineers crunched all the numbers and the handy aluminum arrow charts solved all the woes with their nice little organized blocks.
CARBON ARROWS SCREWED EVERYTHING UP` Then carbon arrows came along and made things easier ... almost. Since carbon arrows had a much broader ranger of application, there was no need for 10 to 15 sizes of the same arrow. For most carbon arrows, 3 to 5 sizes covers virtually every application. So Easton simplified the sizing system by basing the sizes on actual spine deflections. Easton's familiar carbon arrow spine sizing system (500, 400, 340, 300) is basically the arrow's spine deflection x1000. So a 500 shaft is a .500" deflection. A 340 Easton shaft is a .340" deflection and so on. So forgiving the shift of the decimal, the Easton spine sizing system matches up nicely with actual spine deflections. Unfortunately, the system is somewhat counterintuitive. For Easton/Beman arrows, the lower numbered shafts are actually the stiffer heavier shafts, and the higher numbered shafts are the more limber and lighter shafts. This naturally goes against the bigger is more line of thinking. Since most people don't know how spine deflections are obtained, or why they matter, some archers will simply buy the "larger" size for heavier bows and "smaller" sizes for lighter bows. Of course, this is completely backwards. So everyone ended up back at the Easton charts studying the little blocks again. And why not? No archery pro-shop is complete without a big Easton chart on the wall. So why mess with tradition?
CARBON ARROWS TAKE COMMAND OF THE MARKET` Turns out, Easton wasn't the only player in the carbon arrow game. In fact, they were one of the last to join-in when they purchased Beman in 1995. By that time, Gold Tip already had a five year head start with their popular graphite arrows. And Gold Tip had really simplified things with an easy 3 size system, the famous 3555, 5575, and 7595. The system was intended to be self-explanatory. The 3555 roughly fit a 35-55# bow, a 5575 fit a 55-75# bow, and a 7595 fit a 75-95# bow. At least that's how most archers understood the sizing. But it didn't always work out that way. The Gold Tip arrows had spine deflections of .500" (3555), .400" (5575), and .340" (7595) respectively. So for example, a 53# bow shooting a 30" arrow actually required the 5575 spine (per the Easton gold standards anyway) instead of the 3555 that Gold Tip's sizing convention might suggest. So it wasn't long until Gold Tip published their own charts (yes, with the little blocks), based essentially on the Easton spine deflection data. To be fair, Gold Tip's system really wasn't so bad, comparatively anyway. There was worse to come.
MUDDY WATERS` Not to be outdone, Carbon Force Arrows, a division of PSE, decided to really simplify things and make their sizes completely sequential ... 100, 200, 300, and 400. So the larger the number, the heavier and stiffer the arrow. Fine! But this scrambled all of our brains even worse because their arbitrary sizes actually overlapped the actual arrow deflections. The Carbon Force 100 has a .500" spine, the 200 has a .400" spine, the 300 has a .340" spine, and the 400 has a .300" spine. Try to wrap your noodle around that! And just as our grey matter started to congeal from Carbon Force, Carbon Express reinvented their generally understandable 30/50, 45/60, 60/75 system (similar to Gold Tip's system but with the same drawbacks) to a system that's not just arbitrarily sequential (150, 250, 350), but varies from shaft to shaft. Their Maxima 250, for example, has a spine deflection of .404", but the Maxima Hunter (camo) 250 has a spine deflection of .417". Oh boy!
ALL CROSS-REFERENCING LEADS BACK TO EASTON` We're not trying to toot Easton's horn, but it boils down to this. Whether you like Easton arrows or not, Easton is the big dog in the arrow market. And Easton's competitors don't want to be seen as "copycatting" Easton by following Easton's sizing format. They want to be unique and develop their own marketing and sizing system for their products, even if it ultimately leaves us all confused. There are well over a dozen popular carbon arrow manufacturers who sell carbon arrows in the U.S., and all of them are trying to sing their own tune. Just imagine if you went to buy a new set of P225/60R17's for your SUV but the various tire brands were sized using different systems (Red60-400, 6022/175, SUV522/6017). Absurd, right? It would be a nightmare behind the counter trying to cross reference all that. But that's exactly how we do it in the archery industry. It's still the Wild West in our little niche market and everybody wants to be the new sheriff in town. For archery enthusiasts this is both good and bad. Competition and innovation will continue to keep prices low and product quality high, but we'll all have to continue to put our thinking caps on when we shop for arrows.
NO UNIVERSAL SYSTEM - GET USED TO IT` There are no universally agreed spine sizes among the various arrow manufacturers. But the system of actual spine deflection is universal, because those measurements are guided by industry standards. That's the only apples-to-apples system that applies to every brand and model of carbon arrow. As long as the various carbon arrow manufacturers provide their spine deflection data (and they test using the industry standard method), manufacturers can size and market their arrows by any system they like, and we can still reference the proper application from the gold standard Easton charts using actual spine deflections.
Carbon Arrow Selection & Research Guide | Chapter 2
Spine chart easton
Maybe it will. Yes, so much so that in the morning you can go crazy. So I seem to have gone.Arrow spine for traditional bows
Spilled water. She turned on her side and pulled her knees to her chest. Behind me water bubbled up in a refillable enema, then a smear, and a cold, hard tip entered me.
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