Pneumatic tire

Abstract

A pneumatic tire includes an inner liner disposed on an inner side of the tire. The inner liner is composed of a polymer sheet made of an elastomer composition containing a SIBS modified copolymer obtained by modifying a styrene block portion of a styrene-isobutylene-styrene triblock copolymer with acid anhydride. In the inner liner, a ratio (Gs/Gb) between an average thickness Gb in a bead region Rb extending from a tire largest width position to a bead toe and an average thickness Gs in a buttress region Rs extending from the tire largest width position to a corresponding position Lu at a belt layer end is 0.30 to 0.75.

1 . A pneumatic tire comprising an inner liner disposed on an inner side of the tire,
 said inner liner being composed of a polymer sheet made of an elastomer composition containing a SIBS modified copolymer obtained by modifying a styrene block portion of a styrene-isobutylene-styrene triblock copolymer with acid anhydride, and   in said inner liner, a ratio (Gs/Gb) between an average thickness Gb in a bead region Rb extending from a tire largest width position to a bead toe and an average thickness Gs in a buttress region Rs extending from the tire largest width position to a corresponding position Lu at a belt layer end being 0.30 to 0.75.