Xt m8020 double front gear e type side swing front pull 11 speed lightweight front e type mount dyna sys11 11 speed double mtb derailleur for smooth gear changes designed specifically with modern trail bikes in mind shimano xt side swing technology front derailleurs increases tyre clearance by 15mm while new cable routing resulting in the lightest shifting action yet side pull cable routing reinforced light weight chain guide adds rigidity and improved response wider pivot link increases tor