Shimano xt m785 top swing 2x10 front mech lightweight front top swing dyna sys 10 speed double mtb derailleur for smooth gear changes features dual pull design for use with top or bottom cable routing the regular multi fit band clamp assures easy and secure fit on any frame type with adapters to suit seat tube sizes 34 9 318 and 28 6mm reinforced light weight chain guide adds rigidity and improved response wider pivot link increases torsional rigidity easy access angled adjustment screws and