Shimano Dura-Ace FD-R9250 Di2 Front Derailleur Next-generation shifting The latest and greatest Shimano road drivetrain is here and it's fantastic. The all-new Dura-Ace R9250 front derailleur takes the already phenomenal performance of the 11-speed generation and takes it up a notch. Compared to the 11-speed generation front derailleur, the new 12-speed delivers 45% faster shifting in a significantly smaller and sleeker package for increased aero gains. It's also even lighter than the previous generation if you're looking to shave off even more grams. If you simply want the best front derailleur available for your 12-speed Di2 equipped bike then look no further. Features45% faster shifting than the 11-speed generation R9150 front derailleur Sleeker and smaller for increased aero gains Lightweight design keeps the derailleur under 100g Weight: 96g Drivetrain speed: 12Drivetrain compatibility: Shimano 12-speed Di2 road Mount: Braze-on | Shimano | Dura-Ace Fd-R9250 Di2 Front Derailleur 2X12-Speed, Braze-On, Down Swing, For 50-55T Max