For selection process, two piece are normally distance taylormade r9 supertri driver for the high handicapped golfers. Three piece would have a added control with a bit more spin on the green. However as engineers get better, this information is no longer that accurate but can only be used as a guide for r9 supertri driver comparisons.
Compression ratings taylormade r9 supertri ratings are mostly in the low compression ratings. Compression ratings range from 0 the softest to 200 the highest. A low compression means less velocity and less driver spin on initial impact off the tee and vice versa. A higher velocity on general means more distance and on some occasions, harder feel.