| 摘要 |
PROBLEM TO BE SOLVED: To improve run flat durability.SOLUTION: A run flat tire comprises a side reinforcement rubber part 8. The side reinforcement rubber part 8 is formed of a rubber composition having a ratio (M50H/M50N) of tension stress (M50H) during 50% extension at 100°C with respect to tension stress (M50N) during 50% extension at 23°C, being equal to or more than 1.0 and equal to or less than 1.3. A ratio (t/t) of 10% vulcanization time (t) at vulcanization temperature of 160°C of a rubber composition for bead filler 6, with respect to 10% vulcanization time (t) at vulcanization temperature of 160°C of a rubber composition for covering rubber of a carcass ply 5 is, equal to or more than 0.5 and equal to or less than 1.0. |
