| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire capable of enhancing durability of a block provided on a tread surface. SOLUTION: In the pneumatic tire, a plurality of blocks 7 are provided on a tread part. At least one block 7 includes a step surface 9; a wall surface 10 at a former landing side extending in an inner side in a tire radial direction from a ground-contact end edge 9a at the former landing side in its rotation direction; and a wall surface 11 at a later landing side extending to the inner side in a tire radial direction form a ground-contact end edge 9b at the later landing side in the rotation direction of the step surface 9. The respective wall surfaces 10, 11 comprise base parts 10a, 11a at the step surface 9 side; and recessed arch-like curved parts 10b, 11b continued to an inner end in a tire radial direction of the base part and having a center at the outside of the tire. An inclination angleθ1 of the base part 10a at the former landing side relative to a tire normal N is smaller than an inclination angleθ2 of the base part 11a at the later landing side relative to the tire normal N and radius of curvature R1 of the curved part 10b at the former landing side is smaller than radius of curvature R2 of the curved part 11b at the later landing side. COPYRIGHT: (C)2007,JPO&INPIT |
