Heavy duty tire

An off the road tire comprising a carcass, a tread located radially outward of the carcass, the tread having a plurality of lugs, the lugs extending radially outward from an inner tread and being located between first and second lateral tread edges, a first row of lugs extending from a first tread lateral edge axially inwards toward the centerplane, a second row of lugs extending from the opposite tread lateral edge and axially inwards toward the centerplane and wherein the lugs of the first and second rows are separated by a plurality of angled shoulder grooves, wherein an angle of each of the shoulder grooves is in the range of 40 to 50 degrees from the axial direction, wherein a third row of lugs is located between the first and second row of lugs, wherein each shoulder groove terminates in an ending positioned within a third row lug, wherein all of the lugs in each row are aligned circumferentially, wherein the lugs in the third row have a first and second opposed zigzag groove, wherein the first and second opposed zigzag grooves each have a portion extending in the circumferential direction, wherein said portions are not circumferentially aligned with respect to each other.