WINTER TIRE TREAD

A tread for a tire includes a center rib formed by two circumferential main grooves extending along a tire circumferential direction in a center of a tread width direction. Each circumferential main groove being the same axial distance from a tire equatorial plane of the tread. The center rib has a plurality of first main inclined grooves and a plurality of second main inclined grooves. The first and second main inclined grooves are inclined oppositely with respect to the tire circumferential direction such that the first and second main inclined grooves become distanced from the tire equatorial plane from trailing edges in a tire rotational direction toward leading edges. One zigzag shaped central groove is disposed on one side of the tire equatorial plane and the other zigzag shaped central groove is disposed on an opposite side of the tire equatorial plane.