Thanks to the new design of the parallelogram, the rear derailleur is now lighter and more rigid for the most effective and fastest shifting. The design is derived directly from the 11x components with the oversized outer plate to give greater rigidity to the entire system. The surface treatment protects it from corrosion and ensures that the Veloce rear derailleur maintains its performance over time.Upper to lower pulley-axle: 55 mm/ 75 mm (medium cage)Aluminium bodiesRollers on bushingsRollers in special rubberParallelogram with 11s geometry.Options: * short cage black or silver 227g * medium cage black or silver 260g