| 摘要 |
PROBLEM TO BE SOLVED: To compatibly improve riding comfort and high-speed durability and steering stability. SOLUTION: A tread rubber 2G consists of a cap rubber layer 20 and a base rubber layer 21 which is formed with an inner base rubber portion 21A at the center side of a tread and an outer base rubber portion 21B at the outside thereof in the axial direction of a tire. The rubber hardness HC of the cap rubber layer 20 is 60-80 deg., the rubber hardness HB1 of the inner base rubber portion 21A is 50-65 deg., and the rubber hardness HB2 of the outer base rubber portion 21B is 75-95 deg., where the rubber hardness is HB1<HC<HB2. |
