| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire capable of showing superior lopsided wear resistance on all lands formed on the tire. SOLUTION: A center rib 20, a center rib 22 and a shoulder rib 24 formed on a tread surface are formed along outer contours L1, L2 of radii R1, R2 around the inside of a tire. A level difference between the outer contour L1 and the tread face of the shoulder rib 24 is gradually decreased toward the ends of the tire in its cross direction. If a heavy load is operated on a pneumatic tire 10, the lopsided wear of the center rib 20 and the center rib 22 is restricted by the level difference between the shoulder rib 24 and the center rib 22 and, if a light load is operated thereon, the lopsided wear is restricted because the gradual decrease of the level difference toward the ends of the tire in its cross direction. |
