| 摘要 |
PURPOSE:To reduce tire noise such as pattern noise by specifying an angle to a parallel line segment to the tire equator, a position relation at the tire circumference, and a groove depth for each lateral groove in each line of blocks on the center side and outer side of a tire. CONSTITUTION:For a tire 10, lines of blocks 24, 26 comprising a plurality of blocks separated by circumferential grooves 14, 16, 18 and lateral grooves 20, 22 are disposed in a tread part 12. In this case, an angle alpha of the letaral groove 20 separating the blocks in the block line 24 on the tire center side to a parallel line segment to the tire equator is set to be smaller than a similar angle betathe lateral groove 22 at the block line 26 on the tire outer side to the above. The lateral grooves 20, 22 are deflected mutually along the tire circumference. The groove depth of the lateral grooves 20, 22 at a tire center side part is formed to be smaller than the groove depth at a tire outer side part. |
