| abstract |
The inner layer of the core has a diameter of 15-25 mm, a weight of 2-14 grams, a specific gravity of 1.2-4, and a hardness of 55-80 JIS C. The outer layer has a specific gravity lower than that of the inner layer by 0.1-3.0. The cover has a radial thickness of 1.5-2.5 mm. A three-piece solid golf ball comprising a two-piece solid core consisting of inner and outer layers and a cover enclosing the core is improved in durability and flying performance through a proper choice of physical parameters of the core inner and outer layers and the cover. |