Shimano Dura-Ace FD-9250 Di2 12-Speed Front Derailleur

Shimano Dura-Ace FD-9250 Di2 12-Speed Front Derailleur The Shimano Dura-Ace FD-9250 Di2 12-Speed Front Derailleur promotes an incredibly minimal silhouette and low weight; but its advanced design contributes to smoother shifting that is 45% quicker than provided by its predecessor. It’s operated by the gear levers wirelessly via hard wiring to the rear derailleur and internal battery; with this configuration guaranteeing reliability and extended use between battery charges. The integrated auto-trim feature automatically adjusts its position; depending on which sprocket the rear derailleur is operating; eliminating the chances of annoying chain rub. In addition; an optional Synchronised Shift mode can be selected that will intuitively change the front derailleur between the outer and inner chainrings; depending on the rear derailleur’s position; helping to keep chain lines as efficient as possible. This mode can be selected either via the Di2 app or via the Di2 button on the rear derailleur.