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.