Abstract: Significant improvements in heavy and medium duty truck tire wear and endurance are a result of this drive axle tire tread design. The traction and center tread blocks are shaped to give a uni-directional sculpture where the blocks and zigzag grooves regress from the mid-circumferential plane with forward rotation of the tire. The polygonal shaped traction tread blocks have a leading face with a lead slope angle (with respect to a normal from the surface area) greater that the trail slope angle of the trailing face. The lateral groove bottom surface configuration is a circle in the plane parallel to the principal tangential stresses on the surface area of the traction tread block due to a tractive effort of driving or braking. The result is a drive axle tread design with a uniform wear pattern, improved wear rates and improved endurance from groove fatigue while maintaining high levels of snow, wet and dry traction, rolling resistance, casing endurance, and noise abatement.