Absolute precision and reactivity are guaranteed by the new outer plate made of aluminium as per the 11s design The cage, thanks to the new geometry, is more rigid and lighter, and the silicone rollers reduce vibration and improve the silence of the drivetrain Ultra-Shift exclusive parallelogram results in maximum shifting rigidity, fast actuation, precision, and friction reduction for a smooth shift on all levels Compatible with all Campagnolo 11 speed drivetrain compenents RD18-CEB1M 11sp 32 Mid BLK 230g