Campagnolo Veloce 10s Rear DerailleurZero compromise. The Veloce rear derailleur raises the bar on 10 speed drivetrains, taking them to even higher levels of performance. The design of the parallelogram and oversized outer plate, already used for the 11 speed drivetrain, is "enveloping" and makes shifting incredibly fast, precise, and silent. Features & Benefits ULTRA SHIFT ALUMINUM LOWER AND UPPER BODY Lower weight friction reduction longer component life. ALUMINUM PARALLELOGRAM WITH