Arrow spine refers to the stiffness of an arrow. The spine rating of an arrow is based on the amount of deflection it exhibits when a specific amount of weight is applied to its center. The right spine is essential for a well-tuned setup because it affects how an arrow flexes and recovers as it leaves the bow.
 

We offer shafts in 600, 500, 400, 340, 300, 250 spines in a maximum length of 32 inches and 200 spine in a maximum length of 34 inches. Use the following chart for selecting the arrow spine.​​

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Steps to Determine Your Spine

1 - Determine the advertised speed of your bow (IBO or ATA speed) (proceed to the corresponding chart)

2 - Determine the peak poundage of your bow 

3 - Determine the length of the arrow you need **

4 - Determine the total weight in the front of the arrow *

5 - Find your appropriate spine selection!​

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* Charts are set up for an arrow with a 100-grain point and a standard 10-grain insert (total 110 grains up front, +/- 5 grains). 

For every additional 25 grains go down 1 column (add 5 pounds). For every 25 grains less go up 1 column (subtract 5 pounds).

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** Arrow length is measured from one end of the carbon to the other.​

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