Patent ID: 7758445

Claim:
A family of tubular golf club shafts having substantially the same longitudinal bending stiffness profiles and incremental differences in weights, each of said shafts comprising: a shell of composite longitudinal-fiber-and-resin material having a preselected amount of longitudinal-fiber-and-resin material that produces said substantially same longitudinal bending/stiffness profile in each shaft of the family; and a core of composite angle-fiber-and-resin material that produces torsional stiffness in said shaft and having a preselected weight of the angle-fiber-and-resin, the preselected weight of angle-fiber-and-resin material in each shaft of said family being different from the preselected weights in the other shafts of the family to establish the incremental differences in the weights of the shafts, the core of each shaft having an outside surface that is maintained substantially the same size to maintain the same size shell in each shaft, wherein said shafts are of a same predetermined length.