| 摘要 |
PROBLEM TO BE SOLVED: To improve an anti-eccentric wear performance without dropping a snow-ice road performance. SOLUTION: In the right-angled section to a lateral groove 3 of this tyre, a lateral groove wall surface 9A of one side of a periphery direction is composed of a first upward slant surface S1U extending from a block surface upto the first point h1X of a depth h1 while slanting by an angleα1 and a first downward slant surface S1D extending from this first point h1 to a groove bottom and slanted by an angleα2 smaller than the angleα1 and the other lateral groove wall surface 9B of the periphery direction is composed of a second upward slant surface S2U extending from the block surface up to the second point h2X of a depth h2 different from the depth h1 while slanting by an angleβ1 and a second downward slant surface S2D extending from this second point h2X to the groove bottom and slanted by an angleβ2 smaller than the angleβ1. In one section A of a tyre axis direction of the lateral groove 3, the depth h1 of the first point h1X is made bigger than the depth h2 of the second point h2X and in the other section B, the depth h2 of the second h2X is made bigger than the depth h1 of the first point h1X. |
