Lightweight front top swing Dyna-Sys 10-speed triple MTB derailleur for smooth gear changesDual Pull design for use with top or bottom cable routingE-type mounting system allows for perfect set up every timeReinforced light weight chain guide adds rigidity and improved responseWider pivot link increases torsional rigidityEasy access angled adjustment screws and clamp boltAngled inner chain guide tail for increased tyre clearanceDyna-Sys 10-speed design -for use with Dyna-Sys 10-speed MTB drivetrainsSpecifically developed for 68 and 73 mm bottom bracket shells with a 50 mm chain line66-69 degree chainstay to seat tube angle range40-42 tooth outer ring compatible