Motorcycle tire

摘要

A motorcycle tire comprises a tread portion having a tread width between tread edges. The tread portion is provided with a crown oblique groove disposed within a center region of the tread portion is defined as having 30% of the tread width. The center region having a radius of curvature of from 0.60 to 0.75 times the tread width in a meridian section of the tire, and the center region has a land ratio in a range of from 0.75 to 0.95. The crown oblique groove extends continuously or discontinuously in the tire circumferential direction, across the tire equator a plurality of times, and the crown oblique groove is inclined at angles of not more than 20 degrees with respect to the tire circumferential direction.

主权项

1. A motorcycle tire comprising
a tread portion having a tread width as measured axially between tread edges, the tread portion provided with a crown oblique groove disposed within a center region of the tread portion which region is defined as having 30% of the tread width, in a meridian section of the tire, the center region having a radius of curvature of from 0.60 to 0.75 times the tread width, the center region having a land ratio in a range of from 0.75 to 0.95, the crown oblique groove extending continuously or discontinuously in the tire circumferential direction, across the tire equator a plurality of times, and the crown oblique groove inclined at angles of not more than 20 degrees with respect to the tire circumferential direction,wherein
the crown oblique groove is made up of oblique groove segments each extending straight across the tire equator, and the tread portion is provided on each side of the center region with shoulder grooves, the shoulder grooves are substantially straight grooves inclined towards one circumferential direction at a substantially constant angle in the range of 30 to 60 degrees with respect to the tire circumferential direction, wherein the crown oblique groove is discontinuous, and the shoulder grooves on each side of the tire equator are arranged at circumferential pitches each of which is substantially equal to one-quarter of a zigzag pitch (L3+L4+L5×2) of the crown oblique groove.