SHIMANO Ultegra FD-R8150 Di2 Braze-On Front Derailleur 2x12-Speed Down Swing Electronic
The Shimano Ultegra Di2 FD-R8150 Front Derailleur provides quicker shifting than ever before; changing gears 45% faster than the previous Di2 generation.
Fastest ever front shifting, 45% faster than FD-R9150 Smaller, sleeker, lighter Frontal area reduced by 33% Top gear teeth capacity: 50-54T