| 摘要 |
PROBLEM TO BE SOLVED: To provide a light-weight golf shaft with excellent strength.SOLUTION: A shaft 6 has a plurality of full length layers s2, s3, and s6-s9. The full length layers have full length bias layers s2 and s3, and full length straight layers s6, s8, and s9. When a layer in which a matrix resin includes a novolac type epoxy resin is defined as a novolac-containing layer, the full length straight layers s6, s8, s9 located outside the full length bias layers s2 and s3 include the novolac-containing layer. In the novolac-containing layer, a content Rn of the novolac type epoxy resin is 3 mass% or larger and 19 mass% or less. If the average specific gravity of the novolac-containing layers constituting the full length straight layers is defined as S1, and the average specific gravity of the full length bias layers and the layer on the inner side of the full length bias layers is defined as S2, the specific gravity S1 is larger than the specific gravity S2. |
