Campagnolo Super Record X WRL Rear Derailleur – 1×13 Speed. High-end wireless rear derailleur from Campagnolo’s Super Record X WRL groupset. Designed for 1×13-speed drivetrains, this derailleur features an integrated clutch for improved chain stability and precise shifting in demanding off-road conditions. Wireless electronic shifting (WRL). Integrated clutch for chain retention. Super Record X performance level. Note: Battery is not included. Trusted by thousands of riders worldwide.