TREAD PATTERN OF TIRE FOR SNOW REMOVING CAR

摘要

PURPOSE:To enhance the performance on snow of a bias tire made of nylon cords by forming rectangular blocks in three types as main and aux. grooves at a specific angle kept to the center line in the circumferential direction of tire in such a way that the ridges of blocks do not constitute an identical line. CONSTITUTION:Tread pattern is formed by a main groove 1 as lug groove at an angle approx. 45 deg. to the center line and aux. grooves 2 at an angle approx. 45 deg. to the same, where the main groove 1 shall be arranged from the side edge to near the center line and the aux. grooves 2 converge with the main groove 1. These three kinds of rectangular blocks 3a-3c formed thereby are provided with a siping 4 in the longitudinal direction with a length corresponding to 50- 80% of the block length. Here the ridges 5 of blocks 3a-3c shall not constitute an identical line. Thereby the edge dispersion and snow removing effects as well as easy-to-move characteristic of each block can be enhanced, to provide a good performance of driving on the snow.