| 摘要 |
A tread (16) is provided with a plurality of circumferential main grooves that extend in the circumferential direction of the tire, and a first rib (34) and a second rib (38) are formed between the plurality of circumferential main grooves. The first rib (34) and the second rib (38) are respectively provided with first arc surfaces (34A-1R, 38A-1R) having arc-like forms that have the centers within the ribs. In addition, the first rib (34) and the second rib (38) are also provided with second arc surfaces (34A-2R, 38A-2R) that are respectively formed to be continued to the first arc surfaces (34A-1R, 38A-1R) and have curvature radii smaller than those of the first arc surfaces (34A-1R, 38A-1R). |
