| 摘要 |
PURPOSE:To suppress the progress of edge abrasion by setting each width of three layers forming a belt and the width of a hollow part formed in one layer in specified mutual relationship, respectively, and forming a narrow channel extending in the tire circumferential direction within a specified range of a tread part. CONSTITUTION:A belt 2 of a tire applied to vehicles such as electric cars is formed of three belt layers 4-6 consisting of codes directed to the direction crossing to the tire equator face X-X. In this case, the most inner layer 6 among these belt layers is formed in a hollow structure. The width W1 of the intermediate layer 5 is set larger than the layers 4, 6 and also to 80-110% of the width of a thread part 3. Each width W2 of the most inner layer 6 and the most outer layer 4 is set to 80-90% of the width W1 of the intermediate layer 5. The hollow width W3 of the most inner layer 6 is set to 15-50% of the width W1 of the intermediate layer 5. On the tread part 3, a narrow channel 10 extending straight in the tire circumferential direction is formed in a position within 15mm from the side edge of the most outer layer 4 toward the direction of the tire width. |
