The 10speed Miragetm rear derailleur has a composite body and a cage dimensioned for the narrower chain, the geometries are the same as those of the highrange rear derailleurs and the overall quality gives users years of satisfaction when training and racing. Cage Length ShortMedium Drivetrain Spacing Campagnolo 10 Intended Use Road ShifterRear Derailleur Campagnolo Largest Cog 2629 teeth Chain Wrap Capacity 2730 teeth Derailleur Action TopNormal Traditi