Shimano Ultegra Double Di2 FD-R8050 Braze-On Front DerailleurThe Shimano Ultegra R8050 Di2 11x2-speed front derailleur features Synchronized Shift. This allows to simplify the control of the sprockets and chainrings, the synchronized changes allow the rider to work only with the right lever "Full Synchro Shift". Shimano Ultegra Double Di2 FD-R8050 Braze-On Front DerailleurThe Shimano Ultegra R8050 Di2 11x2-speed front derailleur features Synchronized Shift. This allows to simplify the control of the sprockets and chainrings, the synchronized changes allow the rider to work only with the right lever "Full Synchro Shift". With this technology, a simple sprocket change on the cassette automatically determines the front chainring selection, to maintain chain line and cadence. The "Semi Synchro Shift" mode is also available and with which you will control only the knob of the chainrings: the chain is automatically aligned in the best possible development on the cassette.Characteristics:- Large chuck size: 46 to 54 teeth- Chain line: 43.5 mm- Weight: 132 g- Compatible with 11x2 speed systems- Soldare fixingReference code: IFDR8050F