Campagnolo Chorus 11 Rear Dérailleur: The fulcrum of the 11 speed system - an absolute innovation 11 speed parallelogram geometry operates with absolute precision Silver anodized forged aluminum upper body with oversize carbon fiber composite parallelogram link, which confers 150% great torsional rigidity Light alloy outer and inner cages with specially lightened anti-vibration pulleys for maximum smoothness Short cage (55mm pulley-pulley axle dimensions)
