Despite its smaller, lighter design, the Dura-Ace R9250 brings Shimano's fastest front shifting. Shimano's fastest front derailleur just got faster thanks to a new sleeker design. Tipping the scales under 100 grams, the new design shifts 45% quicker than Shimano's previous Dura-Ace R9150, already there fastest. The frontal area of the FD-R9250 is also reduced decreasing aerodynamic drag.   Features Shimano's fastest ever front shifting, 45% faster than FD-R9150. Smaller, sleeker, lighter. Frontal area reduced by 33%. Weight cut to 96g. Top gear teeth capacity: 50-55T.