Double Di2 Derailleur - FD-R7150 DS

SHIMANO Di2 electronic shifting allows you to switch from large to small chainrings, or vice versa, when desired, minimizing the risk of chain dropping. Likewise, shifting can be done without the need to trim the front derailleur to avoid chain rub. The synchromesh and semi-synchronous shift functions can be selected via the E-TUBE app. With digitally precise electronic shifting and coordinated communication between the front and rear derailleurs, the new SHIMANO 105 derailleur offers everyone the best shifting action ever.