| 摘要 |
PROBLEM TO BE SOLVED: To effectively suppress deflective abrasion based on early abrasion of a shoulder part 49. SOLUTION: A value W/R is set to be 0.65 or less and a curvature radius R of a center part 48 of a belt layer 29 is large. Therefore, radius difference of a tread foot surface 46 between the center part 48 and the shoulder part 49 decreases, a ground length in the shoulder part 49 approaches a ground length in the center part 48, thus cutting/sliding abrasion in the shoulder part 49 is decreased, and deflective abrasion is suppressed.
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