Shimano Dura-Ace Di2 FD-R9250 12 Speed Front Derailleur WORKSHOP If you keep using round

If you keep using round ring then others will get quicker

Campagnolo

Raw Titanium Finish

Ergonomic top section with 3° backsweep and 10° tilt

Bottom Bracket/Frame Interface: BB30

Shimano Dura-Ace Di2 FD-R9250 12 Speed Front Derailleur WORKSHOP If you keep using roundDespite 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