| 摘要 |
PROBLEM TO BE SOLVED: To provide a tire for a motor cycle for making both compatible in straight-advance stability and a transition characteristic in turning time.SOLUTION: A tread part 2 comprises a center area Cr and a pair of shoulder areas Sh on both sides of the center area Cr. An outer surface contour line of the center area Cr is a circular arc shape of projecting to the outside in the tire radial direction in a first radius of curvature R1, and an outer surface contour line of the respective shoulder areas Sh is a circular arc shape of projecting to the outside in the tire radial direction in a second radius of curvature R2 smaller than the first radius of curvature R1. The tread part 2 is provided with a center main groove 9 having a plurality of zigzag apexes 10 in the center area Cr and continuously extending in a zigzag shape in the tire circumferential direction, a plurality of shoulder peripheral grooves 13 extending to the shoulder areas Sh from the respective zigzag apexes 10 and a shoulder sub-groove 16 extending by straddling over the center area Cr and the shoulder areas Sh between the shoulder peripheral grooves 13 adjacent in the tire circumferential direction.SELECTED DRAWING: Figure 2 |
