| abstract |
Golf ball 2 has a core 4 , a reinforcing layer 6 and a cover 8 . The core 4 is formed by a center 10 and a mid layer 12 . The center is formed by a center inner sphere 14 and a center outer layer 16 . The center inner sphere 14 and the center outer layer 16 are obtained through crosslinking of a rubber composition. Base polymer of the mid layer 12 is an ionomer resin. Base polymer of the cover 8 is a thermoplastic polyurethane elastomer. A thickness Tc of the cover 8 is equal to or less than 1.0 mm. A hardness Hc of the cover is 20 or greater and 50 or less. A ratio (D 2 /D 3 ) of an amount of compressive deformation D 2 of the core to an amount of compressive deformation D 3 of the golf ball 2 is 0.98 or greater and 1.10 or less. |