the feature of the mixed tread tyre is that it has the advantages of directional pattern, good tyre passing and good wear resistance of the tyre without tread pattern. In the middle of the tread, there are narrow grooves with different directions or longitudinal distributions, while the shoulders of both sides are distributed with wider grooves. this kind of tyre has good adhesion and is suitable for automobiles running on hard foundation, muddy road, macadam road and soil road