TIRE WITH REINFORCED RUBBER SIDEWALL

摘要

This invention relates to a pneumatic rubber tire having a rubber sidewa ll composition of a lug and groove configuration which is designed to be ground contacting. Such sidewall configuration is of a rubber composition comprised of a blend of natural rubber and cis 1,4-polybutadiene rubber which contains specified carbon black reinforcement and silica together with a coupling agent. The ti re tread rubber composition differs from the rubber composition of said sidewall lug and groove configuration by being exclusive of silica and coupling agent and carbon bla ck reinforcement exclusive of said specified carbon black.