The Shimano Deore FD-M4100 Front Derailleur is designed for 2x10 drivetrains. FEATURES : 34.9 clamp band with 28.6/31.8mm adapter Chainstay angle: 64-69 degrees Chainline: 48.8/51.8mm SPECS : Double or Triple: Double Derailleur Capacity: 10 Front Der/Shifter Compatibility: Shimano Mountain Max Ring (teeth): 38 Front Derailleur Style: Side Swing Front Derailleur Cable Pull: Front Pull Front Derailleur Clamp: 31.8 (1-1/4") , 28.6 (1-1/8") , 34.9 (1-3/8") Drivetrain Speeds: 10