Patent ID: 7438104
Filing Date: 2008-10-21
Classification: B60C,D07B,Y10T

Abstract:
1. A radial tire comprising: a carcass layer formed of at least one radial carcass ply disposed between a pair of bead members; a tread disposed at a tire radial direction outer side of a crown region of the carcass layer, and forming a ground-contact portion; a belt layer formed of at least two belt plies each formed from rubber-coated metal wires, and disposed between the tread and the crown region of the carcass layer, the belt layer being structured such that, in at least one belt ply of the belt layer, at least a majority of metal wires in the ply exist as metal wire bundles in which a plurality of metal wires of circular cross-sections and substantially equal wire diameters are aligned in parallel without being twisted together, the metal wire bundles being aligned planarly and in parallel with intervals between the metal wire bundles in the width direction of the belt layer; and at least one cap layer in which organic fibers are covered with rubber and which is disposed between the tread and the belt layer; wherein at least one reinforcing layer, which is formed of rubber, is disposed between the tread and the belt layer; wherein a number of metal wires in the metal wire bundles is 3 to 9, wherein a 100% tensile stress of rubber portions of the reinforcing layer is higher than a 100% tensile stress of rubber of the tread, and wherein the belt layer is formed of two belt plies, and given that G