A pneumatic rubber tire having a sidewall of a rubber composition of elastomers
comprised primarily of a combination of a brominated copolymer of isobutylene and
para-methylstyrene and high trans 1,4-polybutadiene polymer, of which a minor portion
thereof is one or more additional conjugated diene-based elastomers exclusive of
any appreciable amount of high cis 1,4-polybutadiene rubber.