Lightweight front top swing dyna sys 10 speed double mtb derailleur for smooth gear changesdual pull design for use with top or bottom cable routingthe regular multi fit band clamp assures easy and secure fit on any frame type with adapters to suit seat tube sizes 349 318 and 286 mmreinforced 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 tyr