PNEUMATIC RADIAL TIRE FOR HEAVY LOAD VEHICLES

摘要

A pneumatic radial tire for heavy load vehicles which is constructed to effectively suppress railway wear, and which has a tire tread provided with at least one circumferential groove to divide a tread in the widthwise direction and a carcass comprising at least one carcass ply of substantially radially extending rubber coated steel cords and a belt layer for reinforcing a crown portion of said carcass ply; wherein the zigzag angle of the main circumferential grooves with respect to an equatorial line of the tire increases in angle as the tread wears out.