| 摘要 |
The present invention relates to an air pressure tire and has purposes for providing a cooling effect according to tire heating, for improving a drainage performance, and for enabling a driver to effectively grasping the abrasion state of a tread-surface rubber layer touched with the initial ground. According to the present invention, the air pressure tire includes a performance degradation display unit connected to the floor surface of a groove and the side wall of the block and in which a plurality of blocks are formed. The blocks are divided by the groove on the surface of the tread. Slopes are formed in a front side and a rear side of the performance degradation unit. The slopes includes a first slope located in a driving direction and a second slope connected to the first slope. The inner angle of the first slope is smaller than the inner angle of the second slope. |
