Ultegra FD-R8150 Di2 Front DerailleurNew and improvedShimano's all-new Ultegra 12-speed drivetrain takes Di2 up a notch. The Ultegra R8150 Di2 front derailleur has been refined in every aspect, delivering a terrific front derailleur that can hang with the best. It features an all new sleeker, smaller, and lighter design that results in a complete derailleur weighing it at 116g and the frontal area being reduced by 33%. Shifting performance has seen a substantial jump with the R8150 shifting a full 45% faster than the previous generation Dura-Ace. Throw in Hyperglide+ for a smooth and seamless shifting experience and you've got a top notch front derailleur. FeaturesNew design is sleeker, smaller, and lighterImproved shifting performance and out performing the previous Dura-Ace generationHyperglide+ keeps shifting smooth and seamlessMount style: braze-onTop gear teeth: 50-54tDrivetrain speed: 12Weight: 116g | Shimano|Ultegra FD-R8150 Di2 Front Derailleur 2X12 50-54T MAX