| 摘要 |
PROBLEM TO BE SOLVED: To compatibly achieve rough road traveling performance, and rolling resistance performance and high-speed durability performance.SOLUTION: In a pneumatic tire, tread rubber 26 extends in a buttress part 16, installed between a tread part 14 and a sidewall part 12, to form an inner rubber layer 30, sidewall rubber 28 overlaps with the outside of the inner rubber layer to form an outer rubber layer 32 serving as a surface of the buttress part, and the tread rubber 26 is made of rubber having a 300% modulus larger than that of the sidewall rubber 28. The surface of the buttress part 16 is provided with a plurality of first projecting parts 36 arranged at intervals in a tire circumferential direction C and extending in a tire meridian direction M, a plurality of recessed parts 38 each formed by recessing the surface of the buttress part 16 between the adjacent first projecting parts 36, and second projecting parts 40 each projecting in the recessed part 38 by a projection amount H2 smaller than a recess amount H4 of the recessed part.SELECTED DRAWING: Figure 2 |
