| 摘要 |
PURPOSE:To improve durability in a sidewall part at the time of run-flat driving by setting the total thickness of the sidewall part, inclusive of a rubber reinforced layer, down to the same in a range from a substantial rim line to an axial outermost part in a belt or a belt reinforced layer. CONSTITUTION:At the whole substantial range of a sidewall part 2, a rubber reinforced layer 8 is installed in the inner side of a tire. Total thickness (t) of this sidewall part 2 inclusive of this rubber reinforced layer 8 is set down to the same in substance in a range from a virtual rim line position to an axial outermost position in a side end edge position 1-1 of a belt reinforced layer 7b from another side edge position 10-10 of a belt 6. Accordingly, local stress concentration to the rubber reinforced layer 8 is kept back, and crack occurrence in the tire inner surface and heat deterioration in inner rubber are avoided, thus a run-flat travel distance can be lengthened. |
