High speed radial tyre.

摘要

A high speed radial tyre comprises a carcass (7) of carcass cords at an inclination of 70 to 90 degrees to the equator of the tyre and a belt layer (10) characterised in that the thickness ratio (Gc-Gs)/Gc, that is, the ratio of the difference between the crown tread thickness Gc, which is the thickness of the tread at the equator of the tyre, and the shoulder tread thickness Gs, which is the thickness of the tread of the ground contact surface at the outer edge in the direction of the tyre axis, at a position where the ground contact surface in direction of the tyre axis is of the widest width, when mounted on a regular rim, inflated with a specified internal pressure and loaded to its specified load, to the crown tread thickness Gc is greater than 0 and not more than 0.8. This is applicable in particular to aircraft tyres having a breaker reinforcement comprising cords inclined at 0 to 20 degrees and to high speed car tyres having breaker cords at 20 to 40 degrees.