| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a tire that can improve on-ice/snow performance by making siping easily openable while securing a holding property of a spike pin, and can suppress the abrupt lowering of the on-ice/snow performance even when a tread is abraded. <P>SOLUTION: The tire has the tread having a surface layer grounding with a road face and an inner layer arranged inside the tire radial direction of the surface layer, and a plurality of grooves and a land defined by the plurality of grooves are formed at the surface layer. The siping is formed at the land and the spike pin is arranged at the land, the tread has an intermediate layer arranged between the surface layer and the inner layer, the rigidity of the rubber of the intermediate layer is lower than the rigidity of the rubber of the surface layer, and the intermediate layer is composed of foaming rubber in which an air space is formed in a member. <P>COPYRIGHT: (C)2012,JPO&INPIT |
