Shimano Dura-Ace Di2 FD-R9250 12 Speed Front Derailleur WORKSHOP Simply put

Simply put

A long press of the single button will turn the light on and off

Bottom Bracket/Frame Interface: BB30

Concave platform for better grip

Campagnolo

Shimano Dura-Ace Di2 FD-R9250 12 Speed Front Derailleur WORKSHOP Simply putDespite its smaller, lighter design, the DURA ACE FD R9250 brings our fastest front shifting. Our fastest just got faster thanks to the DURA ACE FD R9250. Tipping the scales under 100 grams, the new design shifts 45% quicker than Shimano's FD R9150, already our fastest. The frontal area of the FD R9250 is also reduced decreasing aerodynamic drag. Specifications Our fastest ever front shifting, 45% faster than FD R9150 Smaller, sleeker, lighter Frontal