Radialluftreifen

摘要

A pneumatic radial tire having a tread portion, a pair of axially spaced bead portions with a bead core, a pair of sidewall portions, a carcass having a carcass ply of radially arranged cords extending between the bead portions and turned up around the bead cores to form a main portion and two turned up portions, and a bead apex disposed between the main portion and each turned up portion in each bead portion and extending radially outwardly from the bead core, the carcass cords made of twisted organic fiber filaments, the twist number being more than 5 and less than 30 turn/10 cm.