Patent ID: 6491079
Filing Date: 2002-12-10
Classification: B60C,Y10T

Abstract:
A pneumatic tire comprising a carcass ply of steel cords constituted with a main body portion toroidally extending from a tread portion through a sidewall portion to a bead portion and a turnup portion wound around a bead core embedded in the bead portion, in which a wrap part wound on the bead core along its outer peripheral face is disposed in the turnup portion of the carcass ply and at least one wire chafer wound around the bead core from the main body portion of the carcass ply toward the turnup portion thereof in a widthwise direction is embedded in the bead portion, and a shortest distance of a start end of the wire chafer located at the side of the main body portion of the carcass ply as measured outward from a normal line drawn to an outer face of the bead portion at a first rim line position in the radial direction of the tire is located to be within a range of 15-25 mm and a terminal end of the wire chafer located at the side of the turnup portion of the carcass ply is arranged within a range defined between a vertical line drawn from an outermost end position of the bead core in the radial direction to the outer face of the bead portion and the above normal line.