| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire capable of enhancing heat-generating durability and wear resistance while enhancing the run-flat travel in a flat condition. SOLUTION: The pneumatic tire has a side wall reinforcing layer 11 for reinforcing a side wall part, and a tread outer contour comprises a first arc 13A which is an arc located on a tread center part C on a tire equator line CL and a second arc 13B which is adjacent to an outer side in the tread width direction of the first arc 13A and located on a tread shoulder part S. The second arc 13B is located on the outer side in the tire radial direction from a first virtual line (L1) which is an extending line of the first arc 13A from an intersection (P1) of the first arc 13A with the second arc 13B, and the first radius of curvature (R1) as the radius of curvature of the first arc 13A when the internal pressure is not filled yet is smaller than the second radius of curvature (R2) as the radius of curvature of the second arc 13B when the internal pressure is not filled yet. COPYRIGHT: (C)2009,JPO&INPIT
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