| 摘要 |
<p>It is an object of this invention to provide a rubber composition for a sidewall reinforcing layer of a run-flat tire having superior elastic modulus, low heat build-up property and elongation at break with a good balance and being capable of improving run-flat performance, and the run-flat tire. The present invention provides a rubber composition for a sidewall reinforcing layer of a run-flat tire containing predetermined amounts of carbon black having a iodine absorption number of 50 mg/g or less, silica having a BET specific surface area of 170 m2/g or less, phenol resin and/or modified phenol resin and methylene group-donating compound based on 100 parts by mass of diene rubber component, and the run-flat tire.</p> |
