| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic radial tire capable of securing designated residual cornering force while lightening its weight. SOLUTION: In-plane bending rigidity of a tread part 16 is obtained by an inclined belt layer 20A formed by arranging a steel cord inclining and extending relative to the equatorial plane of this tire, and it can endure lateral force applied when cornering. Circumferential rigidity of the tread part 16 is obtained by a circumferential belt layer 20B formed by arranging an organic fiber cord practically in parallel with the equatorial plane of the tire, the inner pressure is held, and high durability at a high speed is obtained. The cross section shapes of a circumferential main groove 24 provided on the tread part 16 on the right hand side and left hand side sandwiching the equatorial plane of the tire are made different from each other, and rigidity of the tread part 16 on the right side of the equatorial plane of the tire is made different from that on the left side, and thereby, residual cornering force can be produced in the pneumatic radial tire 10. |
