| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a pneumatic tire in which a durability performance of a bead reinforcing rubber layer formed by a strip winding method can be improved.SOLUTION: In the pneumatic tire 1 provided with a toroidal carcass 6 extending from a tread portion 2 to a bead core 5 of a bead portion 4 through a side wall portion 3, a bead reinforcing rubber layer 10 arranged along a lateral surface in a tire shaft direction of the carcass 6 is provided in the bead portion 4. The bead reinforcing rubber layer 10 is formed of a band-like rubber strip 15 spirally wound around in the tire circumferential direction. In a tire meridian cross-section including a tire rotating shaft, an inner surface Si and an outer surface So in the tire shaft direction of the bead reinforcing rubber layer 10 have respectively interfaces 16 to adjacent rubber strips 15, and the number of the interfaces 16 of the inner surface S1 is smaller than the number of the interfaces 16 of the outer surface So.</p> |
