Features of the Shimano Dura-Ace FD-R9100 Front Derailleur Lighter and intuitive shifting operation Natural front shift lever stroke More ergnomical power curve New link (Toggle) construction Precise and easy front derailleur set up More cable routing options Integrated cable tension adjustment New link (Toggle) construction for no need of TL-FD90 and turning converter assembling Adjustable cable tension on the front derailleur