The reinforced shoulder blocks and the dimples in the tread work together to slow down the tread wear rate of the tire. They prevent irregular wear by evenly distributing the force of acceleration, cornering and braking across the tread area. The dimples also help relieve heat buildup on the tire, making sure that the tire wear is even. These two factors working together extend the tread life, since the tire wears evenly, it can be used for a longer period of time.