Despite its smaller and lighter construction, the Dura-Ace FD-R9250 offers the fastest front derailleur shifting function on the market. The fastest shifting is now even quicker with the Dura-Ace FD-R9250 derailleur. Compared to the FD-R9150, which is currently the fastest derailleur available, the new design weighs under 100 grams and enables 45% faster front shifts. The frontal surface area of the FD-R9250 has also been reduced to decrease air resistance.