| 摘要 |
PROBLEM TO BE SOLVED: To provide a golf club head a golf club head capable of reliably preventing a backspin rate from varying in rainfall.SOLUTION: A plurality of fine grooves 4 are formed on a face surface 2. When observing a cross-sectional surface perpendicular to the face surface 2 involving a vertical line passing through the center G of gravity of the golf club head 1 with the golf club head 1 set at preset loft and lie angles, an average width of the fine grooves 4 in the cross-sectional surface is 100 mum or less and an average pitch of the fine grooves 4 in the cross-sectional surface is 100 mum or less. Hence, the discharge of water can be accelerated by a capillary phenomenon, making it possible to reliably prevent a backspin rate of a golf ball from varying in rainfall. |
