Dura-Ace R9250 Di2 Front DerailleurOur 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. Despite its smaller, lighter design, the Shimano Dura Ace FD R9250 offers ultra fast front shifting. Fast Di2 shifting performance Smaller, sleeker, lighter Frontal area is smaller than previous