Wide link design Dyna-Sys 10-speed Deore MTB front derailleur Top swing design Wide pivot link design for greater torsional rigidity improves shifting response & 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 Dyna-Sys 10-speed MTB drivetrain compatibility Reinforced steel chain guide offers high strength & rigidity forimproved shifting response For triple 40-42 tooth chainring For 66-69 degree chainstay angle