Golf club steel shaft

Abstract

A golf club steel shaft in which, when a distance from a front end of the shaft to a center of gravity point of the shaft is L G and when a full length of the shaft is L S , a center-of-gravity rate Y (%) obtained as L G /L S satisfies 51.0≦Y≦60.0, a shaft weight X (g) satisfies 80≦X≦140, and a full length of the shaft L S (inch) satisfies 30≦L S ≦42.

What is claimed is: 
     
         1 . A golf club steel shaft in which, when a distance from a front end of the shaft to a center of gravity point of the shaft is L G  and when a full length of the shaft is L S , a center-of-gravity rate Y (%) obtained as L G /L S  satisfies 51.0≦Y≦60.0, a shaft weight X (g) satisfies 80≦X≦140, and a full length of the shaft L S  (inch) satisfies 30≦L S ≦42. 
     
     
         2 . The golf club steel shaft according to  claim 1 , wherein a thickness of a portion up to 150 mm from a butt end toward a front end side of the shaft is not smaller than 0.30 mm but not larger than 0.40 mm. 
     
     
         3 . The golf club steel shaft according to  claim 1 , wherein an outer diameter of a portion up to 150 mm from a butt end toward a front end side of the shaft is not smaller than 14.5 mm but not larger than 15.3 mm. 
     
     
         4 . The golf club steel shaft according to  claim 2 , wherein an outer diameter of a portion up to 150 mm from a butt end toward a front end side of the shaft is not smaller than 14.5 mm but not larger than 15.3 mm. 
     
     
         5 . The golf club steel shaft according to  claim 1 , wherein the number of steps included in a portion up to 400 mm from a butt end toward a front end side of the shaft is not less than 5 but not more than 8. 
     
     
         6 . The golf club steel shaft according to  claim 2 , wherein the number of steps included in a portion up to 400 mm from a butt end toward a front end side of the shaft is not less than 5 but not more than 8. 
     
     
         7 . The golf club steel shaft according to  claim 3 , wherein the number of steps included in a portion up to 400 mm from a butt end toward a front end side of the shaft is not less than 5 but not more than 8. 
     
     
         8 . The golf club steel shaft according to  claim 4 , wherein the number of steps included in a portion up to 400 mm from a butt end toward a front end side of the shaft is not less than 5 but not more than 8.