| abstract |
The rubber composition for a run flat tire according to the present invention comprises a rubber component and a low molecular weight conjugated diene-based polymer having a weight average molecular weight of 10,000 to 40,000 in terms of polystyrene of 1 to 10 parts by mass with respect to 100 parts by mass of the rubber component. And a vulcanization accelerator, and the ratio of the content of the vulcanization accelerator to the content of the low molecular weight conjugated diene polymer (vulcanization accelerator / low molecular weight conjugated diene polymer) is 1 ~ 3.5, so that a run-flat tire with improved run-flat durability without impairing ride comfort can be obtained. The run flat tire includes a sidewall portion having a side reinforcing rubber layer using a rubber composition for a run flat tire, a tread, a carcass, a bead core, and a bead filler. |