| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire which can improve wet performance, on-ice performance and uneven wearing resistance without deteriorating the other performance. SOLUTION: In this pneumatic tire, a rubber layer 20 and a fiber layer 22 are alternately layered in a tire width direction, a cap part 12A of a tread 12 is constituted, between the fiber layer 22 and the rubber layer 20, a foaming rubber layer 23 for improving a separating property is arranged. By a running input, the fiber layer 22 is separated, in a surface of the tread 12, a fine groove 24 appears in large quantity. Since the fine groove 24 lays a role of drainage path discharging water in a grounded surface, wet performance, on-ice performance, etc., are improved. The fiber layer 22, can be easily separated from the rubber layer 20 by existing of the foaming rubber layer 23 and the fine groove 24 can be uniformly formed all over the tread 12. |
