Patent ID: 8746302

Claim:
A tire comprising: a pair of sidewalls in spaced apart relation and extending substantially radially from a respective inner circumferential portion to a respective outer circumferential portion; a tread extending between and connecting outer circumferential portions of the sidewalls; at least a portion of a tire cavity defined by the tread and sidewalls; a bead portions on the inner circumferential portions of each radially extending sidewall, the bead portion providing an engagement surface for engaging a wheel on which the tire is to be mounted; a noise reducing foam substantially filling the tire cavity; and a plurality of noise-reducing particles dispersed in the noise reducing foam, wherein the plurality of noise-reducing particles comprise at least one of polytetrafluoroethane and steel wire, wherein a material characteristic of the foam changes with radial distance from the inner circumferential portion of the radially extending sidewalls.