Runflat tire system and support ring therefor

摘要

A runflat tire system comprises: a pneumatic tire; a wheel rim on which the pneumatic tire is mounted; and a support ring made of elastic material and disposed in a cavity surrounded by an inner surface of the rim and an inner surface of the tire mounted thereon, wherein the support ring comprises an annular body extending in a circumferential direction of the tire and provided with a plurality of hollows opening at the cavity, and at least one noise dumper made of sponge material having apparent density of 0.1 g/cm³ or less and disposed in the hollow such that the noise dumper does not protrude into the cavity from an inlet surface of the hollow.