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, the current fastest front derailleur on the market, the new design weighs under 100 grams and provides 45% faster shifting operations in the front. The frontal surface area of the FD-R9250 has also been reduced to lower air resistance.