Tire support ring

Abstract

The present invention relates to a run flat safety support ring intended to be mounted on a wheel rim inside a tire equipping a vehicle for supporting the tire tread in case of loss of inflation pressure, comprising a generally cylindrical crown intended to come in contact with the interior of the tire tread in the event of the loss of inflation pressure, and leaving a clearance from the tire tread interior at normal pressure, the crown comprising a self lubricating rubber composition, the self lubricating rubber composition comprising at least one rubber and from 1 to 50 phr of at least one additive selected from alcohols of formula I, esters of formula II, or amides of formula III wherein R1 and R2 are independently selected from C12-C36 alkyl, C12-C36 alkenyl, or C12-C36 alkadienyl.

Dependencies are inferred from the claim text.