摘要 |
PROBLEM TO BE SOLVED: To provide a golf ball 2 having excellent flying performance and controllability on middle iron shots.SOLUTION: A golf ball 2 includes a spherical core 4 and a cover 6 covering the core 4. The cover 6 includes an inner cover 8 and an outer cover 10 positioned outside the inner cover 8. When distances (%) from a central point to nine points and JIS-C hardness at the nine points which are obtained by dividing a region from the central point to a surface of the core 4 at intervals of 12.5% of a radius of the core 4 are plotted in a graph, the Rof a linear approximation curve obtained by a least-square method is 0.95 or larger. The hardness of an innermost layer of the cover 6 is higher than the surface hardness of the core 4. Preferably, the core is obtained by being crosslinked with a rubber composition. The rubber composition includes (d) an acid and/or a salt. |