Patent ID: 9302545
Filing Date: 2016-04-05
CPC Classification: B60C

Claim Text:
1. A tire for a motorcycle comprising: a tread and a carcass having a radial structure, the tread including a base layer positioned on an inside in a radial direction and a cap layer positioned on an outside, the cap layer having a center region and a pair of shoulder regions positioned on an outside in an axial direction with respect to the center region, a ratio (Wc/Wt) of a width We of the center region to a width Wt of the tread being set to equal to or higher than 0.15 and being set to equal to or lower than 0.25, so that the center region comes in contact with a ground while the shoulder region does not come in contact with the ground in straight running at a constant speed, and the center region and a part of the shoulder region come in contact with the ground in the braking and accelerating operations, a loss tangent tan δc of the center region being smaller than a loss tangent tan δs of the shoulder region, a loss tangent tan δb of the base layer being smaller than the loss tangent tan δs of the shoulder region, the loss tangent tan δb of the base layer being equal to or smaller than 0.12, and the loss tangent tan δb of the base layer being equal to or smaller than the loss tangent tan δc of the center region, wherein the loss tangent tan δc of the center region is equal to or greater than 0.05 and is equal to or smaller than 0.15, and the loss tangent tan δs of the shoulder region is equal to or greater than 0.20 and is equal to or smaller than 0.35, and wherein the cap layer is laminated on an outside in the radial direction with respect to the base layer, and the base layer extends from one end of the tread to the other end of the tread.