Shimano Ultegra FD-R8150 Di2 Front Derailleur
Features of the Shimano Ultegra FD-R8150 Di2 Front Derailleur 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 Chain stay Angle 61 - 66 Chain Line 44.5 mm Front Speeds 2 Rear Speeds 12