Heavy duty radial tire with specified arrangement of chafer and carcass turnup

摘要

A heavy duty radial tire comprises a carcass ply being turned up around bead cores form the axially inside to outside of the tire, a bead apex disposed between the carcass main portion and each turnup portion, the turnup portion extending radially outwardly beyond the radially outer end of the bead apex so that the turnup portion has a parallel part which is placed adjacent to and substantially in parallel with the main portion, and a chafer disposed in each bead portion and extending radially outwardly beyond the radially outer end of the bead apex along the axially outside of the turnup portion.