Enhance the shifting performance of your Shimano groupset with an Ultegra Di2 front derailleur. Without a cable to stretch, like a mechanical front derailleur, this Ultegra Di2 front derailleur will offer a clean, precise shift every time. Similarly, this front derailleur promises a smooth, millimetre-accuracy action throughout wet and cold conditions too. Being compatible with the Shimano Synchronized Shift technology, this Ultegra Di2 derailleur can be programmed to perfectly suit your riding style and maintain the best gear ratios for your riding terrain. Importantly, it's also compatible with a range of chainring sizes, from 53-tooth for your time trial bike to 46-tooth for cyclocross. Ultegra Di2 R8050 front derailleur Braze-on fit Smooth, reliable action Synchro-shift compatible 43.5mm chain line 11-speed compatible Compatible with 46-tooth to 53-tooth chainrings 132-grams