Bike type Road Part type Rear Derailleur Brand Shimano Speed 6 7 8 Groupset Dura Ace Groupset series Dura Ace 7400 Compatibility Shimano Dura Ace 7400 8 speed w/ 9 speed shifters Models Part number Front speed Rear speed Total capacity Low sprocket max Max front difference Weight Listings RD-7400 2, 3 26T 26T 13T 189g RD-7401 2, 3 26T 26T 13T 189g RD-7402 2, 3 26T 26T 14T 189g