| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire improving both of on-ice performance and dry performance. SOLUTION: The pneumatic tire includes a plurality of sipes 61, 62, 63, 64, 65, 66, 67 disposed in land parts arranged in a tread part and a plurality of hole groups 8, 81, 82, 83, 84, 85, 86. Each hole group is formed of three or more holes 8a, 8b, 8c and is formed on the surface of the tread. In each hole group, with respect to two optional holes i and j, when the radius of a circumscribing circle Ci of the hole i is ri, the radius of a circumscribing circle Cj of the hole j is rj, and the center distance of both the circumscribing circles Ci, Cj is dij in plan view, in all holes i, at least one hole j satisfying dij≤(ri+rj)×2 exists within the hole groups 8, 81, 82, 83, 84, 85 to which the hole i belongs. The area ratio of the holes on one side of the tire equator line is larger than the area ratio of the holes on the other side of the tire equator line. COPYRIGHT: (C)2012,JPO&INPIT |
