Dura Ace Di2 FD-R9150Di2 2x11 front derailleur Shimano synchronized shift Maintains compact and smooth appearance Race endurance for less damage in crash Quick and smooth front shifting under high pedaling torque Attributes Chainline 43. 5mm Cable Pull Di2 FD Capacity 16T Chainstay Angle 61 66 FD Mount Type Braze on Swing Down Max Chainring 55T Primary Color Black Speed 2x11