Super Record 13 rear derailleur, the first 2x13 speed derailleur. A completely redesigned solution aimed at achieving the highest level of performance, innovation, and style.Optimisation of the chain line to allow for immediate, smooth, and fast gear changes. Precise, silent, and immediate gear shifting, even under high power.14-tooth upper pulley with a differentiated profile: reduces friction between the chain links passing through the cage, as well as friction in the bearings.Ceramic bearings to eliminate any friction and enhance the precision of chain movement.The lower pulley, responsible for tension, has been designed to offer effective and long-lasting performance over time and distance.Attachment to the frame: via the new Campagnolo UDH direct mount hanger.Reduces volume and thus weight thanks to a 25% reduction in lateral volume.