| 摘要 |
PROBLEM TO BE SOLVED: To provide a run-flat tire ensuring ride comfort while improving steering stability during run-flat traveling of a vehicle. SOLUTION: The run-flat tire 1 includes a reinforcing rubber layer 40 which is formed from a tread section 34 to a sidewall section 38, and is of crescent-shaped cross section along a tread width direction TW and a tire radial direction TD. The reinforcing rubber layer 40 includes a high-elasticity reinforcing layer 44 disposed outside in the tire radial direction; and a low-elasticity reinforcing layer 42 having a lower elastic modulus than the high-elasticity reinforcing layer 44. Using as reference a length W1 from a tire equator line CL to an end portion of a tread section 34 along the tread width direction TW, and assuming a virtual line L1 which passes through a position corresponding to a length of 1.2 times the length from the tire equator line CL to the end portion of the tread section 34, and is vertical to a carcass 12, the high-elasticity reinforcing layer 44 is formed over the entire region extended from an end portion 50 of the reinforcing rubber layer 40 located inside in the tread width direction to the virtual line L1. COPYRIGHT: (C)2011,JPO&INPIT |
