Braking’s original outer profile design – floating and constructed of only the highest quality stainless steel, capable of expanding and contracting under hot temperatures, without warping, 320mm outer diameter – perfect for off-road to supermoto conversion; must use 320mm Caliper Bracket, Alloy center for less weight, helps get the bike in and out of turning angles quicker, Provide much stronger braking power, but with improved feeling – leading to increased overall performance and handling of the bike, A great combination of improved performance and appeal