Patent ID: 6135183
Filing Date: 2000-10-24
Classification: B60C,Y10T

Abstract:
A tire having a tread, a belt structure and a carcass radially inward of the tread and the belt structure, the carcass comprising:a pair of inextensible bead cores;at least one first ply radially inward of the belt structure and extending from bead core to bead core, the at least one first ply being reinforced by cords having a modulus E;a pair of sidewall structures, each extending radially inwardly from the tread, each sidewall structure having at least one first runflat insert radially inward of the at least one first ply, a second runflat insert, and a second ply being spaced from the at least one first ply by the second runflat insert, the second ply being reinforced by cords, the cords having a modulus E different from the cords of the at least one first ply; and wherein the cords of the at least one first ply are substantially inextensible being made of aramid or metal and have a modulus greater than X while the cords of the second ply have a modulus X.