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, 320 mm outer diameter - perfect for off-road to supermoto conversion; must use 320 mm 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