| 摘要 |
A golf ball (2) includes a spherical core (4), an inner mid layer (6), an outer mid layer (8), a reinforcing layer (10), and a cover (12). When distances (%) from a central point of the core and JIS-C hardness at nine points, obtained by dividing a region from the central point of the core (4) to a surface of the core (4) at intervals of 12.5% of a radius of the core (4), are plotted on a graph, R2 of a linear approximation curve obtained by a least-square method is equal to or greater than 0.95. Hardness Hm1 is greater than hardness Hm2. Hc is less than Hm1. T2 is equal to or greater than 0.5 mm but equal to or less than 1.6 mm. [Reference numerals] (AA) Hardness (JIS-C);(BB) Distance from a central point (%) |
