| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a tire capable of achieving both reduction of rolling resistance and maintenance of wet performance and used for a heavy load vehicle. <P>SOLUTION: This pneumatic tire for a heavy load is formed by arranging circumferential main grooves 3, 4 on a tread of a tread part by interposing a tire equator E, and partitioning the tread of the tread part into a center region Z1 and both side regions Z2, Z3. The tire is structured such that, in the center region Z1, a circumferential thin groove 6 being at least one circumferential thin groove 6 extending along the tire circumferential direction, and having an opening of the circumferential thin groove 6 closed at tire grounding is arranged, and two or more center rib-like land parts 8, 9 are partitioned and formed; shoulder circumferential grooves 11, 12 extending along the tire circumferential direction are arranged on the outer sides in the tire width direction of the circumferential main grooves 3, 4; and when it is assumed that the groove width of each of the circumferential main grooves 3, 4, that of each of the shoulder circumferential grooves 11, 12, and that of the circumferential thin groove 6 are W1, W2 and W3, respectively, the relationship of W1>W2>W3 is satisfied. <P>COPYRIGHT: (C)2013,JPO&INPIT |
