Shimano Dura-Ace FD-R9250 Di2 Front Derailleur - 2x12-Speed, Braze-on, Down Swing, For 50-55t Max, Black/Silver

Despite its smaller, lighter design, the Shimano Dura-Ace FD-R9250 offers ultra-fast front shifting. Fast Di2 shifting performance Smaller, sleeker, lighter Frontal area is smaller than previous designs to reduce aerodynamic drag Top gear teeth capacity: