A club length L1 of a golf club 2 is equal to or greater than 43 inches and equal to or less than 48 inches. A ratio Iss/Ix is equal to or greater than 0.070 and equal to or less than 0.100. A club inertia moment Ix about a swing axis is equal to or less than 6.90×10 3 (kg·cm 2 ). The inertia moment Ix (kg·cm 2 ) is calculated by the following formula (1). The shaft inertia moment Iss (kg·cm 2 ) is calculated by the following formula (2). Ix=Wc ×( Lc +60) 2 +Ic (1) Iss=Ws ×( Ls +60) 2 +Is (2)
1. A golf club comprising:
a head, a shaft, and a grip, wherein:
a club length is equal to or greater than 43 inches and equal to or less than 48 inches;
if a shaft inertia moment about a swing axis is defined as Iss (kg·cm 2 ) and a club inertia moment about the swing axis is defined as Ix (kg·cm 2 ), a ratio Iss/Ix is equal to or greater than 0.070 and equal to or less than 0.100, and the club inertia moment Ix is equal to or less than 6.90×10 3 (kg·cm 2 ); and
the inertia moment Ix is calculated by Equation (1), and the inertia moment Iss is calculated by Equation (2):
Ix=Wc ×( Lc+ 60) 2 +Ic (1)
Iss=Ws ×( Ls+ 60) 2 +Is (2)
if a club weight is defined as Wc (kg), an axial direction distance from a grip end to a center of gravity of a club is defined as Lc (cm), a club inertia moment about a center of gravity of the club is defined as Ic (kg·cm 2 ), a shaft weight is defined as Ws (kg), an axial direction distance from the grip end to a center of gravity of the shaft is defined as Ls (cm), and a shaft inertia moment about the center of gravity of the shaft is defined as Is (kg·cm 2 ).
2. The golf club according to claim 1 , wherein the shaft inertia moment Iss (kg·cm 2 ) is equal to or less than 700.
3. The golf club according to claim 1 , wherein:
a grip inertia moment Igs (kg·cm 2 ) about the swing axis is equal to or less than 150; and
the inertia moment Igs is calculated by Equation (3):
Igs=Wg ×( Lg+ 60) 2 +Ig (3)
if a grip weight is defined as Wg (kg), an axial direction distance from the grip end to a center of gravity of the grip is defined as Lg (cm), and a grip inertia moment about the center of gravity of the grip is defined as Ig (kg·cm 2 ).
4. The golf club according to claim 1 , wherein Lf1/Lf2 is equal to or greater than 0.55 and equal to or less than 0.67, if an axial direction distance from a shaft tip end to the center of gravity of the shaft is defined as Lf1, and a shaft length is defined as Lf2.
5. The golf club according to claim 1 , wherein Ix/Mt is equal to or greater than 410 and equal to or less than 450, if a club static moment is defined as Mt (kg·cm), and the static moment Mt is calculated by Equation (5):
Mt=Wc ×( Lc− 35.6) (5).
6. The golf club according to claim 1 , wherein a club static moment Mt is equal to or greater than 14.5 kg·cm and equal to or less than 16.5 kg·cm, if the static moment Mt is calculated by Equation (5):
Mt=Wc ×( Lc− 35.6) (5).
7. The golf club according to claim 1 , wherein Ihs/Ix is equal to or greater than 0.88 and equal to or less than 0.93, if a head inertia moment about the swing axis is defined as Ihs.
8. The golf club according to claim 1 , wherein the club inertia moment Ix is equal to or greater than 6.30×10 3 (kg·cm 2 ).