| 摘要 |
There is provided a rubber compound for reinforcing a side portion of a tire and a run flat tire that can maintain satisfactory tensile elongation at break and also provide better run-flat performance. The rubber compound for reinforcing a side portion of a tire contains at least one of natural rubber and isoprene rubber in an amount of 20-80 parts by weight and syndiotactic crystal-containing butadiene rubber in an amount of 80-20 parts by weight to provide 100 parts by weight of a rubber compound, with silica blended therein in an amount of 5-50 parts by weight, the silica having a pH value of 7.0-12.0 in a 5% aqueous solution. |
