| 摘要 |
PROBLEM TO BE SOLVED: To suppress lowering of various performance changing caused by running without deteriorating a riding sensation. SOLUTION: This radial tire is formed that a carcass extending in a toroidal state between a pair of bead parts forms a skeleton and the crown part of the carcass is reinforced by at least two layers of belts. A hybrid cord formed that at least one organic fiber cord 1 and one metallic strand 3 are twisted together is used as a carcass ply cord. Twisting of the organic fiber cord 1 and the metallic strand 3 satisfies a relation represented by a formula of 18>=y>=5.6x, wherein x indicates a length (a pitch: mm/time) per one full twist of an original yarn 2, y indicates a length (a pitch: mm/time) per one full twist of the metallic strand 3. |
