Tyre with good steer on ice and snow - has tread with main circumferential grooves oxidised by transverse grooves so main edges of tread blocks provide zigzag effect

摘要

Tread of a tyre has three or more rows of blocks divided by circumferential and transverse-grooves, some between the circumferential grooves and some running from the outermost main circumferential grooves towards the tyre edges, in addn. each block has strips. There are at least three pointed projections on edge(s) of each block, and these projections are set at intervals round the circumference. ADVANTAGE - Tyres provide good grip in ice and snow conditions without using spikes and they maintain good steer at the same time.