| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire for a motorcycle with rolling resistance more reduced than a conventional one, without deteriorating driving stability.SOLUTION: A pneumatic tire 10 for a motorcycle includes a bead part 1, a sidewall part 2, a tread part 3 and a carcass 4. When a central region in the tire width direction, sandwiching a tire equator, of the tread part 3 is set as a center part 3a and both outer sides in the tire width direction of the center part 3a is set as a shoulder part 3b, a curvature radius Rc of an outer contour of the center part 3a and a curvature radius Rs of an outer contour of the shoulder part 3b satisfy a relation represented by Rc>Rs in a state of normal internal pressure with no-load specified by JATMA. Also, the pneumatic tire includes only these belt layers: an inclined belt layer 5 consisting of one layer inclined to the circumferential direction of the tire on the outer side in the tire radius direction of the carcass 4; and a spiral belt layer 6 consisting of one layer of reinforcing cord spirally wound in the circumferential direction on the outer side in the tire radius direction of the inclined belt layer. |
