Shimano Deore M590 Front Mechanical works the 44-48T chainsets. 9 Speed Top Swing Dual Pull Multifit Front Derailleur. Wide link design Deore M590 MTB front derailleur. Light action top swing design. wide pivot link design for greater torsional rigidity improves shifting response and service life. Multi-fit compatibility means that this front derailleur will fit any frame type or seat tube size. Cable routing can be used with frames built for top or bottom pull derailleurs. Mega9 drivetrain compatibility. Reinforced steel chain guide offers high strength and rigidityfor improved shifting response. Maximum capacity of 22 teeth, and up to 48 tooth chainring. For 66-69 degree chainstay angle