| 摘要 |
PROBLEM TO BE SOLVED: To sufficiently improve both of the shoulder rigidity and the tire traversal rigidity with good balance while ensuring the gripping performance and the comfort in riding at high level. SOLUTION: The inner rubber 12 of which both inner ends 12E are cut at a position K near a height of a rim flange, is mounted between an outer rubber 11 composed of the tread rubber 2G and the side wall rubber 3G, and a carcass 6. The rubber hardness Hs1 of the outer rubber 11 is 55-75 degree, and the rubber hardness Hs2 of the inner rubber 12 is 60-80 degree, and higher than the rubber hardness Hs1. The inner rubber 12 has a basic part 13 gradually thickened from an equator C of the tire to the inner end parts 12E. |
