Shimano Ultegra FD-R8050 Di2 11-Speed Front DerailleurShimano Ultegra FD R8050 Di2 11 Speed Front Derailleur. Ultegra FD R8050 Front DerailleurSystem communication with rear derailleur combined with programmed chainguide control means minimal chance of chain drop Quick and smooth front shifting under high pedaling torque TECH SPECS Double or Triple Double Drivetrain Speeds 11 Derailleur Capacity 16 Front Derailleur Clamp Braze on Front Derailleur Cable Pull Electronic Front Der Shifter Compatibility