Shimano Dura-Ace Di2 R9250 2×12 Spd Front Derailleur With the Dura-Ace Di2 12-speed groupset, SHIMANO is literally stepping up a gear and taking its top electronic shifting group for road bikes to the next level. The electronically controlled FD-R9250 front derailleur is optimally adapted to the new 12-speed drivetrains and the SHIMANO HG+ chain and tooth profile used for it. The Dura-Ace front derailleur receives shifting commands directly from the Di2 rear derailleur via the common cable connection to the battery. This way, it supports wireless shifting with a compatible shift lever but comes without its own receiver unit. Featherweight 96 grams are the result. On the performance side, the SHIMANO FD-R9250 front derailleur impresses with precise and smooth gear changes of the proven Di2