Campagnolo's improved design for the Super Record 11 Rear Derailleur provides quicker, more precise shifting than the previous iteration. Campagnolo's redesign complements the change in cable pull ratio for the new shifters and features rectangular cross sections for an increased return load. Also, to keep the chain seated securely on the cassette for maximum power transmission, Campagnolo adjusted the parallelogram's motion as you shift across the cassette. Not only does this enhance power transmission, but it also reduces wear on your chain and cassette. Campagnolo uses carbon fiber for the parallelogram and cage, and the upper and lower bodies use a strong, lightweight monolithic technopolymer. The pulleys are made with a lightweight polymer and are designed with cut outs to save additional weight. Ceramic bearings in the bottom pulley and titanium screws also aid in keeping the Super Record 11 light. Finally, Campagnolo's Super Record Rear Derailleur is only compatible with 2015 Campagnolo Super Record, Record, and Chorus drivetrain components.