| 摘要 |
PROBLEM TO BE SOLVED: To improve electrical resistance reduction performance while improving rolling resistance and high-speed durability.SOLUTION: Rim cushion rubber 53 is arranged at a point which contacts with a rim R of a bead part 5. The rim cushion rubber 53 is constituted of inside-rim cushion rubber 53A disposed inside in a tire radial direction and outside-rim cushion rubber 53B disposed outside in the tire radial direction which are different in rubber compositions, the inside-rim cushion rubber 53A is composed of rubber which is lower in electrical resistance and hither in rubber hardness than the outside-rim cushion rubber 53B, and the outside-rim cushion rubber 53B is composed of rubber which is lower in heat generation than the inside-rim cushion rubber 53A.SELECTED DRAWING: Figure 3 |
