Shimano ultegra di2 r8050 11sp front derailleurredesigned to be compatible with a wider 11 speed gear range but still retaining the same slick shifting ability, the ultegra di2 r8050 is a real game changer'. '.strtoupper('s')tiff and efficient enough to change gears cleanly even when youre pedalling hard out of the saddle, its the ideal front derailleur upgrade for your shimano ultegra di2 equipped road bike.shimano synchronised shiftingutilising shimano's innovative synchronised shift, the front derailleur automatically shifts when the rear derailleur is shifted, which means that both derailleurs work together seamlessly'. '.strtoupper('c')onveniently, this shifting technology works the other way around, too so, the rear derailleur shifts automatically when the front derailleur is shifted'. '.strtoupper('t')his means you will always have optimal front rear gear positioning'. '.strtoupper('d')i2s auto trim feature automatically centres the front derailleur precisely around the chain, which avoids chain rub as you travel across your cassette'. '.strtoupper('w')elcome to the new age of performance oriented shifting.features speed 11 speed mount type braze on compatibility ultegra r8000 di2, dura ace 9100 di2 shimano 2x11 speed electronic drivetrains only chain stay angle 61 66deg top gear teeth 46t 53t total capacity 16t e tube ports 1 sd50 ports 1 updated pull arm for more direct and easy shifting improved clearanceupgraded to shift under high pedalling torque synchronised shift full and semi synchronised shifting program programmed chainguide control redesigned to fit a wider gear pitch without sacrificing shifting performance shorter rear centre length 410mm system communication with di2 rear derailleur, meaning minimal chance of chain drop weight 132gtechnologies di2 the power and precision of di2 is unmatched'. '.strtoupper('i')t enables beautifully smooth shifting both front and rear'. '.strtoupper('t')he lack of maintenance and adjustment is impressive once youve customised your di2 to shift to your preferences, it will continue to do so endlessly shimano synchronised shift with the customisation of the e tube project app, both front and rear derailleurs are automatically selected for the most optimal gear combination a 2 year warranty is offered with all shimano products from chain reaction cycles 3 years on dura ace and xtr products.buy shimano components from chain reaction cycles, the world's largest online bike store.