| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve noise performance by suppressing degradation of steering stability. <P>SOLUTION: In this pneumatic tire, main grooves 3 continuously extending in a tire circumferential direction, and a plurality of lateral grooves 4 each extending in a direction crossing the main groove 3 are formed in a tread part 2, whereby a block row 5R where blocks 5 partitioned by the main grooves 3 and the lateral grooves 4 are arranged in the tire circumferential direction is formed. An angle α1 of the lateral groove 4 with respect to the tire circumferential direction is ≥80°. The block 5 includes axial wall surfaces 6 each facing the lateral groove 4, and circumferential wall surfaces 7 each facing the main groove 3. On the axial wall surface 6, a plurality of radial ribs 8 each extending in the groove depth direction at an angle θ1 ≤30° with respect to the normal direction of a block tread 2A are formed at intervals in the length direction of the lateral groove 4. On the circumferential wall surface 7, a plurality of circumferential ribs 9 each extending in the length direction of the main groove 3 at an angle γ1 ≤10° with respect to the block tread 2A are formed at intervals in the groove depth direction. <P>COPYRIGHT: (C)2013,JPO&INPIT |
