PNEUMATIC RADIAL TIRE

摘要

A pneumatic radial tire provided with a band layer consisting of a band ply formed by arranging one or a plurality of band cords on the inner side of a tread section and a radially outer side of a belt layer,and spirally coiling a tape−form,band−like ply buried in topping rubber.This band ply has an elongation resistance K(unit;N·pieces/cm),determined by the following expression,of 99 to 700,when a sectional area per piece of the band cord is S(unit;mm2),modulus at 2% elongation M(unit;N/mm2),and arrangement density of band cord per cm of width of a band ply D(unit;pieces/cm).K=S×M×D/100−−−(1)