RUN-FLAT PNEUMATIC RADIAL TIRE

摘要

A run-flat pneumatic radial tire having an aspect ratio of up to 50%, which includes a reinforcing liner layer mode of a rubber having a complex modulus at 20 DEG C. E*20, a ratio of a complex modulus at 100 DEG C. to the complex modulus at 20 DEG C., a 100% modulus and a loss tangent (tan delta ) at 100 DEG C. which satisfy certain specified numeric values. The liner has a crescent sectional shape and is disposed in sidewall portions of a carcass layer with its end portions overlapping the end portions of a belt layer and a bead filler having a specified hardness and height h from a wheel rim base. The carcass layer consists of an inner carcass layer turned up around the bead core from inside to outside the tire so that its end portion is positioned at a position higher than the height h of the bead filler and an outer carcass layer having an end portion disposed axially outward of the bead core.