GOLF CLUB SHAFT AND GOLF CLUB
Provided are the golf club shaft and the golf club for offering excellent feel of swing motions without demanding fine setting while keeping advantages of the short-sized golf club shaft. The golf club shaft includes a shaft body which extends in a longitudinal direction, and a gravity center shifting member attached to the shaft body for shifting a shaft gravity center toward a distal-end side in the longitudinal direction. In the case where the shaft body is cut to have a shaft full length of 43 inches or shorter, and positions of a distal-end portion and a proximal-end portion in the longitudinal direction are defined by percentage as 0% and 100%, respectively, a position of the shaft gravity center is set to be in a range from 39% to 45%.
1 . A golf club shaft, comprising:
a shaft body which extends in a longitudinal direction; and
a gravity center shifting member which is attached to the shaft body for shifting a shaft gravity center toward a distal-end side in the longitudinal direction,
wherein in the case of cutting the shaft body to have a shaft full length of 43 inches or shorter, and defining positions of a distal-end portion and a proximal-end portion in the longitudinal direction by percentage as 0% and 100%, respectively, a position of the shaft gravity center is set to be in a range from 39% to 45%.
2 . The golf club shaft according to claim 1 , wherein a cut length of the shaft body at the proximal-end side in the longitudinal direction is longer than a cut length of the shaft body at the distal-end side in the longitudinal direction.
3 . The golf club shaft according to claim 1 , wherein a weight ratio of the gravity center shifting member to the shaft body is set to be in a range from 14% to 33%.
4 . The golf club shaft according to claim 1 , wherein the gravity center shifting member includes a metal cylinder buried in an inner circumferential surface of the shaft body.
5 . The golf club shaft according to claim 1 , wherein the shaft body includes a first region having a shaft outer diameter relatively gently reduced, a second region having the shaft outer diameter relatively steeply reduced, and a third region having the smallest relative change amount of the shaft outer diameter, which are sequentially arranged from the proximal-end side toward the distal-end side in the longitudinal direction.
6 . The golf club shaft according to claim 5 , wherein an occupancy percentage of the first region in the longitudinal direction is 30% or higher, an occupancy percentage of the second region in the longitudinal direction is in a range from 45% to 60%, and an occupancy percentage of the third region in the longitudinal direction is in a range from 10% to 25%.
7 . The golf club shaft according to claim 5 , wherein a grip is attached to an outer circumferential surface of the first region, and a metal cylinder as the gravity center shifting member is buried in an inner circumferential surface of the third region.
8 . A golf club configured to have a club head and a grip attached to the golf club shaft according to claim 1 .