Wide main trench design:4 wide longitudinal main pattern grooves,fast drainage, improve drainage efficiency,improve wetland control performance. Steel sheet interlock and disconnect design:Increase the rigidity of the pattern block,effectively improve the handling. Shoulder continuous pattern block:The connected patterns guarantee the stability of drive and steering. Knurled design of main trench bottom:Groove bottom knurled design, effectively break the cavity noise, improve comfort. Seal the transverse and longitudinal trenches:Block the longitudinal channel pump suction noise to the outside propagation Reduce noise on the outside of the car and in the ear. Shoulder groove dislocation design:The dislocation of shoulder groove produces interference effect, which is conducive to reducing noise.