Combining SHIMANO's new DI2 platform and the road incarnation of Hyperglide+, the Ultegra R8150 front derailleur shifts between chainrings with the fastest, most seamless action on the market. Features: Fastest ever front shifting, 45% faster than FD-R9150. Smaller, sleeker, lighter.Frontal area reduced by 33%. Weight cut to 116 g.Top gear teeth capacity: 50-54T.
Super fast shifting
Better aerodynamics, thanks to its frontal area reduced by 33%