Thanks to the new design of the parallelogram the rear derailleur is now lighter and more rigid for the most effective and fastest shiftingthe design is derived directly from the 11x components with the oversized outer plate to provide greater rigidity to the entire systemthe surface treatment protects it from corrosion and ensures that the veloce rear derailleur maintains its performance over timetechnical specificationsupper to lower pulley axle 55mm 75mm medium cagealuminium bodiesro