| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire capable of improving high speed durability.SOLUTION: A pneumatic tire comprises a belt layer 7 of slantingly arranging a cord to the tire circumferential direction on the outer peripheral side of a carcass layer 4 in a tread part 3 and a belt reinforcement layer 9 of arranging an organic fiber cord in the tire circumferential direction on the outer peripheral side of the belt layer, and uses the cord composed of aliphatic polyamide fiber, that is, the cord being 0.030-0.040 in the ratio (shrinkage stress (cN/dtex)/the dry thermal shrinkage ratio (%)) of shrinkage stress at 150°C to the dry thermal shrinkage ratio at 150°C, as the organic fiber cord of the belt reinforcement layer.SELECTED DRAWING: Figure 1 |
