Patent ID: 8602908

Claim:
A golf club shaft formed by curing a wound prepreg, the golf club shaft comprising: a main body layer having a full length layer provided over a full length of the shaft, wherein when a layer positioned on the outermost side in the full length layer is defined as a full length outermost layer, the full length outermost layer has an exposure layer exposed to an outer surface of the shaft; and a tip reinforcing layer provided on an outermost layer, wherein a prepreg for the tip reinforcing layer has a portion having a larger circumferential direction width toward a tip side and the prepreg for the tip reinforcing layer has a thickness Pt of 0.06 mm or greater and 0.12 mm or less and an edge of the tip reinforcing layer extends spirally, wherein the golf club shaft is subjected to surface polishing so that a height h 1 of a level difference formed by the edge of the tip reinforcing layer satisfies the following item (a): (a) when the height h 1 at a position placed apart from a tip by 60 mm is defined as h 11 ; the height h 1 at a position placed apart from the tip by 120 mm is defined as h 12 ; the height h 1 at a position placed apart from the tip by 180 mm is defined as h 13 ; the height h 1 at a position placed apart from the tip by 240 mm is defined as h 14 ; and the height h 1 at a position placed apart from the tip by 300 mm is defined as h 15 , an average value Ha of the heights h 11 to h 15 at the five positions is equal to or less than 0.03 mm, and wherein, when a thickness of said exposure layer on the shaft before the surface polishing is defined as Qt 1 (mm) and an average thickness of the exposure layer after the surface polishing is defined as Qt 2 (mm), a ratio (Qt 2 /Qt 1 ) is equal to or greater than 0.6.