Enkei RPF1Following the high performance trend every year, tires and wheels are getting larger year after year. In order to reduce weight under a vehicle's suspension, it is important to reduce the wheel weight. The M. A. T process improves the mechanical property of the rim section by shaving the rim's thickness and therefore reducing wheel weight by 10% to 15% therefore reducing the overall vehicle weight by 20 lbs. Please select size when ordering.