SHIMANO Ultegra Di2 FD-6870 Road Bike Front Derailleur Brazed-On

Updated with a lighter, slimmer design, the Shimano Ultegra Di2 FD-3870-F Front Derailleur delivers swift and smooth 11-speed shifting performance for competitive cyclists. Di2 electronic system guarantees easier, effortless, faster and more precise gear changes in demanding conditions. Programmed motion tracks the chain, eliminating chain drop when shifting inward from the big ring. Self-trimming design automatically moves the chain guide in response to the gear position of the rear derailleur, putting an end to chain rub, chain bounce and dropped shifts. Noiseless design ensures silent shifts, so you can concentrate on the road ahead. Shimano Electronic Intelligence System allows accurate and effortless shifting in challenging circumstances, plus it'll never be affected by contaminated or stretched cables, since the shifting signal is transferred electronically E-TUBE offers optimum on-the-bike flexibility: Transmits interactive signals and power supply to each part by "Plug & Play" connection No rust, no stretch, no freezing and advanced low maintenance SM-PCE1 connects between PC and components to update firmware Digital device stays the latest version by updating firmware for improved function Precision actuators move the cage swiftly and smoothly for fast, silent and accurate shifts every time Programmed automatic trimming function Support bolt creates a rigid platform for the front derailleur to move the chain to the outer chainring Maintains correct alignment, even when under high pedaling torque