SHIMANO FD-R770 28.6/31.8mm Dbl Frt Der For flat bar Chain Compatibility: Shim/SRAM 10Clamp: 28.6/31.8mmCrank/FD Type: Road Double,Road CompactDerailleur Capacity: 16FD/Shifter Compatibility: Shimano Flatbar Road DoubleFront Derailleur Cable Pull: BottomFront Derailleur Clamp: 28.6mm (1-1/8"),31.8mm (1-1/4")Front Derailleur Clamp: 31.8mm (1-1/4"),28.6mm (1-1/8")Front Derailleur Style: TraditionalMax Ring: 56teethSpeeds: 10spWeight: 105g