COR - Coefficient of Restitution
To put it simply its the amount of energy transfer between the club and the ball. I can range from 0 (nothing transfered) to 1 (all the energy). For golf clubs, the legal limit for the COR is 0.830.
This is just good to know, because most of the drivers/ clubs have been maximised for COR and is rarely stated in the driver specs. If its above 0.830, it would be listed as non conforming.
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