RUBBER COMPOSITION FOR SIDEWALL

It is an object of the present invention to provide a rubber composition for sidewall having improved high-speed durability. Provided is a rubber composition for sidewall, comprising a rubber component and a thermoplastic resin, wherein the rubber component comprises a styrenebutadiene rubber and/or a butadiene rubber, wherein an amount of a cis-1,4-bond butadiene unit in a total amount of the rubber component is 80.0% by mass or less, and wherein a crack growth rate measured under a predetermined condition is at a certain level or lower.