| 摘要 |
PROBLEM TO BE SOLVED: To improve uneven wear resistance and noise performance without deteriorating drainability.SOLUTION: An inside block row is formed by arranging inside blocks in the circumferential direction with an inside lateral groove which is inclined at an angle α of 10 to 40°, between an outer circumferential main groove which is located closest to a tread grounded end and an inner circumferential main groove which is located inside thereof. The inside lateral groove includes: a first inside lateral groove including a wide section continuous to the outer circumferential main groove and a narrow section continuous to the inner circumferential main groove; an outer widened section whose width gradually increases from a neck section with the minimum groove width to the outer circumferential main groove; and an inner widened section whose width gradually increases from the neck section to the inner circumferential main groove. The second inside lateral groove has a substantially constant depth. The first inside lateral groove has the groove depth in the narrow section which is smaller than the groove depth in the wide section. |
