TYRE COMPRISING CARCASS REINFORCING CORDS OF LOW PERMEABILITY, AND VARIABLE THICKNESSES OF RUBBER COMPOUND

摘要

Radial tyre consisting of at least one layer (2) of metal reinforcing elements (11), said tyre comprising a crown reinforcement (5) and a tread (6) which is connected to two beads (3) by two sidewalls. The metal reinforcing elements are non-wrapped cords which on what is referred to as the permeability test return a flowrate < 20 cm3/min, and the thickness of rubber compound between the interior surface (10) of the cavity (8) of the tyre and the closest point (17) of a metal reinforcing element to said interior surface is < 3.8 mm and the ratio between said thickness measured at the circumferential mid plane and said thickness in another region of the tyre is > 1.05.