| 摘要 |
A pneumatic tire in which a reinforcing layer and a tread are disposed at an outer circumference of a crown portion of a carcass which extends over a pair of bead cores and is formed in a troidal shape, wherein: rubber layers having different wear resistances are adjacent to each other in a cross section of at least a ground portion of the tread, which cross section is orthogonal to a radial direction of the tire, and two or more rubber layers of the rubber layers are superposed on one other per 10 mm length along the cross section. When the surface of the tread wears due to the running of a vehicle, the rubber layer having low wear resistance wears more than the rubber layer having high wear resistance. Accordingly, a plurality of narrow grooves are formed on the surface of the tread. Due to the grooves formed in this way, wet resistance and ice gripping ability improve. <IMAGE> |
