| 主权项 |
1. A golf club shaft having a tip end, a central portion, and a butt end that is formed from multiple carbon fiber prepreg sheets wound to form layers each having straight or bias oriented fibers wherein,
if a distance from the tip end of the shaft to a center of gravity of the shaft is LG and if the full length of the shaft is LS, then the relationship 0.54≦LG/LS≦0.65 is satisfied, the golf club shaft has a weight that is not larger than 55 g, the golf club shaft has a torque value that is not higher than 6.5 degrees, proportions in mass of bias oriented fiber prepreg layers at a tip end portion, a central portion, and a butt end portion satisfy the relationship:
tip end portion<central portion≦butt end portion, and the prepreg layers within a range of 300 mm from the tip end comprise 15 to 25 mass % of prepreg layers that contain pitch-based fiber and 75 to 85 mass % of prepreg layers that contain PAN-based fiber. |
