| 摘要 |
[Problem] To provide a golf ball exhibiting high carry performance, excellent approach performance, and an excellent stroke sensation. [Solution] A golf ball is provided with a spherical core, an intermediate layer, an inner-layer cover, and an outer-layer cover. The hardness (Hm) of the intermediate layer is greater than the hardness (Hinc) of the inner-layer cover. The hardness (Hinc) of the inner-layer cover is greater than the hardness (Houc) of the outer-layer cover. The difference (Hm-Houc) between the hardness of the intermediate layer and the hardness of the outer-layer cover is greater than 25. The volume (Vm) of the intermediate layer is greater than the volume (Vinc) of the inner-layer cover. The volume (Vinc) of the inner-layer cover is greater than the volume (Vouc) of the outer-layer cover. The ratio [(Vm+Vinc+Vouc)/V] of the sum (Vm+Vinc+Vouc) of the volumes of the intermediate layer, the inner-layer cover, and the outer-layer cover, to the volume (V) of the entire golf ball is less than 0.30. The ratio (Vm/Vouc) of the volume of the intermediate layer to the volume of the outer-layer cover is greater than 1.50. The product (Vm∙Hm) of the volume and hardness of the intermediate layer, and the product (Vouc∙Houc) of the volume and hardness of the outer-layer cover satisfy the relationship [(Vm∙Hm)/(Vouc∙Houc)] > 3.0. |
