| 摘要 |
Radial tires are constructed of single or multi-reinforcing plies whose cords are arranged at 70-90≦̸against the equatorial plane of the tire. Carcass plies (2), whose left and right sides are inserted in bead wires, and their crown portions are reinforced by belt plies (4) In at least one of the rubber portions of the under-tread layers (5) and carcass ply layer (2), the tangential loss is 0.2 or less, and the modulus of storage elasticity is 120 Kg/Cm2 or more.
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