| 摘要 |
An angle ( THETA 1), which is formed by a tire leading edge side contour line (HL) of a ground-contact configuration and a side surface of a leading edge side of a block of a first block row (32) disposed along a tire circumferential direction, and an angle ( THETA 2), which is formed by the tire leading edge side contour line (HL) of the ground-contact configuration and a side surface of a leading edge side of a block of a second block row (36) disposed parallel to and asymmetrically to the first block row, are set to be substantially equal. In this way, levels of pitch noises of the first block row and the second block row can be made equal. By adjusting tire circumferential direction phases of blocks of the first block row (32) and the second block row (36), the pitch noises of the same level interfere with one another. A reduction in pattern noise is thereby achieved without changing a negative ratio. <IMAGE> |
