| 摘要 |
PROBLEM TO BE SOLVED: To provide a tire achieving both reduction of rolling resistance and improvement of grip performance while suppressing occurrence of uneven wear. SOLUTION: The tire 900 has a configuration for making a curvature radius Rt2 of a second tread 942 smaller than a curvature radius Rt1 of a first tread 941. Thus, the fuel saving is achieved by increasing a ratio of a ground contact area of the first tread 941 with small rolling resistance when a relatively small camber angle (0°or its vicinity) is formed. Meanwhile, the improvement of grip performance can be achieved by increasing the ratio of the ground contact area of the second tread 942 with a high grip force when a relatively large camber angle is formed. A grounding load is restrained from unevenly acting on the second tread 942 even when the relatively large camber angle is formed, by making a curvature radius Rt2 smaller than a curvature radius Rt1, and thus, the occurrence of uneven wear is suppressed. COPYRIGHT: (C)2009,JPO&INPIT |
