![]() ![]() While determining a dynamic spine, several factors such as peak bow weight, point weight, point combination, bowstring material, strands, vanes, etc. For example, in the case of a static spine, an arrow of spine rating 300 bends 0.3 inches when some weight is applied to it.Ī dynamic spine defines the way how an arrow responds through the stored energy in the bow after shooting. The spine rating of an arrow is defined by the total number of inches it deflects multiplied by 1000 due to the weight. In this case, the arrow needs to be 29 inches long and has to be adjusted by two different ends making a distance of around 28 inches. In a detailed way, it is a way how an arrow responds when a weight of 1.94 pounds is suspended from its center. One of them is a Static Spine, and the next one is a Dynamic Spine.Ī static spine is the spine measurement which is measured in a static state of the arrow. There are two different types of arrow spine available out there. If you own an arrow with 300 spine rating and your friend owns one with 500, then your arrow would be more rigid than your friend’s. ![]() The making of a stiffer arrow is all due to its lower spine rating. While a model of arrow can be available in a single version, you would still be able to find out the same arrow with different spine ratings. Arrow spine is the measurement of stiffness of an arrow. ![]()
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