| 摘要 |
PROBLEM TO BE SOLVED: To suppress tumbling of a tire at cornering with a medium/low speed without impairing the straight line stability, maneuvering stability and the rigid feeling of tire, by specifying the rubber thickness distribution of the tire outer part. SOLUTION: A radial tire of a motorcycle is structured so that; the height of the tread end is 0.4-0.6 times as large as the height of the tire section, the height of the bead apex is 0.2-0.8 times as large as the height of the tread end, the height of the ply wind-up is 0.5-1.0 times as large as the height of the tread end, the rubber thickness TF between the carcass and the tire outer surface at the point one third higher than the region Y from the bead core 5 to the tread end P1 ranges from 1.6 to 5.9% of the nominal section width W of the tire, the rubber thickness TE at the point P3 two thirds higher ranges from 1.6 to 5.9% of the section width W, and the rubber thickness TD at the tread end ranges from 4.1 to 10.0% of the section width W, and further the ratio of rubber thickness TD/TE ranges from 1.8 to 2.1 while TD/TF ranges also from 1.8 to 2.1.
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