Shimano Dura-Ace FD-9070 is a Dura-Ace Di2 electronic front derailleur for 11-speed road bikes with a double chainring setup. It uses a braze-on mount and is intended for Shimano Dura-Ace Di2 2×11 drivetrains, making it a fit for riders who want electronic front shifting on a traditional road frame with a braze-on tab. The derailleur is designed around 50-55T large chainrings and has a 16T total capacity, so it suits standard road doubles rather than compact or triple setups. Published specs list the weight at about 114 g, which keeps it competitive for an electronic road front derailleur while still providing automatic trim and clean shift behavior when correctly set up.