Lightweight front conventional swing high clamp band mount Dyna-Sys11 11-speed double MTB derailleur for smooth gear changesDual Pull design for use with top or bottom cable routingReinforced 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-Sys11 11-speed design - for use with Dyna-Sys11 11-speed MTB drivetrainsDeveloped specifically for double chainsets and frames with band on frame designComes with high band clamp and necessary shims for all band dimensionsSpecifically developed for 68 and 73 mm bottom bracket shells with a 48.8 mm chain line66-69 degree chainstay to seat tube angle range34-38 tooth outer ring compatible