HEAVY-DUTY RADIAL TYRE FOR USE ON AND OFFTHE ROAD

摘要

A radial tire for heavy-duty vehicles comprises a tread having a central portion and two lateral portions. The central portion is formed with at least one circumferential rib and at least two circumferential grooves, and each lateral portion is formed with a circumferential zigzag rib and with transverse grooves and blocks. The circumferential zigzag rib defines angles that are alternately reentrant and salient, and the transverse grooves and blocks form extensions, in a direction towards the nearer edge of the tread, of the reentrant and salient angles, respectively. Successive transverse blocks alternately terminate at greater and lesser distances from the median plane of the tire, and each transverse groove has less-steeply-inclined walls than the circumferential grooves have and have at every level a greater width than the circumferential grooves have at the same level.