Those who choose the veloce rear derailleur know that they have a system capable of offering the maximum reliability and precise operationthe entirely aluminium body is robust and light the chain moves on pulleys realized with a special rubber which dampens vibration and which run on sintered pulleys and bushingsupper to lower pulley axle 55 mm aluminium bodies rollers on bushings rollers in special rubberanti vibrations rubber pulleys short or medium cage aluminium body weight 2