Milwaukee Twins Steel Disc Brake Rotor For Harley Designed for Harley motorcycles, the Milwaukee Twins Steel Disc Brake Rotor offers an advanced vented stainless steel construction to enhance heat dissipation. It features a 420 steel plate induction hardened surface for unmatched wear resistance and precision ground for accurate, smooth performance, ensuring reliability and efficiency in braking. Formerly offered under the J&P Cycles brand. Features: Vented stainless steel finish Surface induction hardened with a 420 steel plate for superior wear Precision ground for trueness Replaces OEM 44136-84A