| 摘要 |
PURPOSE:To suppress the pattern noise and improve the wet performance without deteriorating the steering stability which is improved by the block pattern having the less number of pitches. CONSTITUTION:As for a radial tire, a plurality of main grooves 1 and a plurality of subgrooves 2 and 3 which are inclined in the opposite directions for the tire circumferential direction, toward the shoulder regions on the left and right sides from the center region are formed on a tread surface, and a tread pattern having a shoulder block row 5L on the outside of the main groove 1 positioned on the lelt and right outermost sides in the tire width direction and having the second block row 6L on the inside is provided, and each pitch of the block row 5L and the block row 6L is set to 30-45. Accordingly, the subgroove 2 for dividing the block row 5L and the subgroove 3 for dividing the block row 6L are offset each other in the tire circumferential direction, and the subgroove 2 of the block row 5L is bent to a chevron shape at the grounded edge, and the inner end of the subgroove 2 is extended to the near center of the block width in the block of the block row 6L, and the outer end of the subgroove 3 of the block row 6L is extended to the near grounded end (e) in the block of the block row 5L. |
