| 摘要 |
<p>PROBLEM TO BE SOLVED: To minimize the physical disorder in swinging of different clubs, and regularly provide a maximum flying distance and stable directivity by providing plural kinds of golf club groups having the same head speed and constituting a series relation the same club counts of which have the same toe down quantity ratio. SOLUTION: This golf club series consists of three wood golf clubs 11 of different kinds with the same head speed and the same club count #1(X), #1(Y), #1(Z). Namely, this series consists of three wood golf clubs differed in kind such as a loft angle, a center-of-gravity height, a center-of-gravity depth, a lie angle, a face angle, a head volume, a total weight or the like, but the respective toe down quantity ratios are set to substantially equal to each other. An identification mark P corresponding to the toe down quantity corresponding to the head speed is displayed on a part of the shaft 12 of this golf club to display the unified head speed and toe down quantity of the wood golf club set.</p> |
