Patent ID: 7040367

Claim:
A run-flat tire, comprising: (a) an outer tire, (b) an inner support ring, disposed interiorly of the carcass and having a surface facing the interior surface of the tire, and (c) a lubricant disposed between the facing surface and the interior of the tire, the lubricant comprising: (1) a carrier fluid selected from the group consisting of water-soluble fluid, a water-miscible fluid and mixtures thereof; (2) a thickener; (3) a surfactant, and wherein the lubricant has an initial viscosity above 100,000 centipoises at 25° C. and from 1 to 20 RPM as measured with a Brookfield viscometer, the lubricant undergoing temporary shear thinning and returning to substantially its starting viscosity after contact between an inner surface of an outer tire and a support ring of the run-flat tire.