Heavy duty pneumatic radial tire exhibiting less railway wear

摘要

A heavy duty pneumatic radial tire exhibiting less railway wear is disclosed. This tire has a tread pattern formed in a tread divided into a plurality of circumferential ribs by at least two zigzag grooves. Each of these zigzag grooves has a width, amplitude and pitch of 4.5 to 7.5%, 0.5 to 2. 0% and 2.0 to 7.0%, respectively, based on a width of the tread.