Shimano 105 FD-R7150 Di2 Front Derailleur - 2x For 2x12-Speed Braze-On Down-Swing BLKShimano 105 FD R7150 Di2 Front Derailleur 2x For 2x12 Speed Braze On Down Swing Black. The Shimano 105 FD R7150 Di2 front derailleur provides precise coordinated front shifting. Features full and semi synchronized shifting functions that can be selected using the E TUBE app. Digitally accurate electronic shifts and coordinated communication between shifter and derailleur Shift from the big to small chainrings or vice versa whenever you like while