Full carbon frame + 7075 aluminum alloy guide wheel material. Saves 60% of the frictional resistance of the bicycle chain compared to 11T. Complete carbon fiber cage. CNC AL7075 lightweight pulley and axle. 17T Motorcycle Derailleur Rear Derailleur for Carbon Fiber Road Series
Color: SD4 Red (R8000,8050,8070,9170,9150,9100) Battery included or built-in: No Packaging Size: 18.2 x 9.2 x 3.8 cm; 100 g
