Design with three longitudinal zigzag patten goves provides water drainage perfomance in wet oad and excellet steer-ability on snowice road. Design with bg patten bock outside provides enough rgidity and excellent steer-ability.

Design with multiple crossed patten inside enlarges snow hoding capabity and strength of snow column, and enhanced the grp capability.

The fine sots in the pattem reduced the hiting noise, the zigzag slots diftsed the noise frequency, making the noise even in

various frequency waves.