| 摘要 |
PROBLEM TO BE SOLVED: To provide a golf club shaft having a high strength even with a light-weight.SOLUTION: A shaft 6 comprises: at least two hoop layers s3 and s8; at least one bias layer; and at least one straight layer. An intervention layer other than the hoop layers exists between all opposed hoop layers. The opposed hoop layers have an average thickness t, and the total thickness of the intervention layer is designated at T. The shaft 6 satisfies the following formula (1). T/t≥1.9 - - - (1).SELECTED DRAWING: Figure 2 |
