Patent ID: 6318431
Filing Date: 2001-11-20
Classification: B60C,Y10T

Abstract:
A heavy duty radial tire comprisinga carcass including a carcass ply made of cords arranged at an inclination angle of 70 to 90 degrees with respect to the tire equator, the carcass ply comprising a main portion extending from a tread portion to a bead core in a bead portion through a sidewall portion, the main portion integrally provided with a turnup portion, the turnup portion turned up from the axially inside to the outside at said bead core and extending radially outwardly, anda bead apex disposed between the main portion and turnup portion of the carcass ply extending and tapering radially outwardly from the bead core, whereinsaid turnup portion extends radially outwards along the axially outer surface of said bead apex, and then from the radially outer end of the bead apex, it has a portion extending substantially parallel with and adjacent to the main portion of the carcass ply, andthe length L of the parallel portion is 1.0 to 8.0 times the maximum section width CW of the bead core.