| abstract |
(57) Abstract: A rubber composition for a tire sidewall of the present invention comprises a random copolymerization of ethylene, an α-olefin having 3 to 20 carbon atoms, and a specific branched chain polyene compound. The random copolymer rubber (A) comprises a polymer rubber (A), a diene rubber (B), carbon black (C) and a vulcanizing agent (D). Number 3 to 20 molar ratio with α-olefin, iodine value and intrinsic viscosity measured in 135 ° C decalin [η] Is in a certain range. [Effect] The above rubber composition can provide a tire sidewall having excellent weather resistance and dynamic fatigue resistance as well as excellent fuel economy. |