Outer and inner diameter of the disk have a non-round design that enables better radial expansion of the rotor under extreme heat conditions. Moreover, piercing holes are replaced by edges specifically designed to grow brake pad regeneration process. Efficient design utilizes all the brake pad surface evenly and eliminates the need for lightening holes that weaken rotors. Rotor float to expand and contract as they heat up without warping. Outer and inner diameter of the disk have a non-round design that enables better radial expansion of the rotor under extreme heat conditions. Moreover piercing holes are replaced by edges specifically designed to grow brake pad regeneration process. Provide maximum stopping power while remaining perfectly flat. Special high-carbon content heat-treated stainless steel. Optimal mechanical characteristics at high running temperatures.