For riders looking for premium performance, Jagwire Pro Semi-Metallic pads feature a lightweight aluminum backing plate, reducing the weight by nearly 50%. The high- performance semi-metallic compound combines the low-noise and positive braking feel of a resin pad with the longevity and wet-weather performance of a metallic pad. WHEN TO USE: Perfect for road bikes, XC race, or any other bike where every gram counts.Compatibility: ShimanoXTR M9100; Dura Ace R9270, R9170; Ultegra R8170, R8070; 105 R7070; Tiagra 4770; GRX RX810, RX400; Road/CX RS805, RS505, RS405, RS305; Metrea U5000RidereverTriva, Attack-S (FM), Attack-U (FM), MCX-2 (FM), MCX-1 (FM)