Shimano Ultegra FD-R8150 Di2 Front Derailleur - 2x12-Speed, Braze-on, Down Swing, for 50-54t Max, Black/Silver

Combining Shimano's Di2 platform and the road incarnation of Hyperglide+, the Ultegra FD-R8150 front derailleur shifts between chainrings with the fast and seamless action. Small, sleek and lightweight front derailleur Frontal area is smaller than previous designs to reduce aerodynamic drag Top gear teeth capacity: 50-54t 61-66 degree chainstay angle Includes 1 SD300 port Double or Triple: Double Derailleur Capacity: 16 Front Der/Shifter Compatibility: Shimano Road Di2 Max Ring (teeth): 54 Front Derailleur Style: Traditional Front Derailleur Cable Pull: Electronic Front Derailleur Clamp: Braze-on Drivetrain Speeds: 12