Excellent traction even on changing terrain conditions for maximum speed. Different knob stiffness provides outstanding adaptability of tread to terrain surface for the best steering response. Sharp-edged knobs provide strong traction. Wide-spaced knobs provide full traction on loose surface over a hard base. Knob layout optimized to increase the number of knobs on contact area and quantity of working edges for maximum grip and traction. Different central knobs help giving the maximum traction and braking on medium to hard terrain.