APEX XPLR AXS 44D REAR DERAILLEURThe Apex XPLR AXS rear derailleur is compatible with a range of cassettes with extended development ranges and large 36- or 44-tooth sprockets. It features a spring-loaded clutch for perfect chain management on roads and trails. With its innovative and intuitive eTap shifting logic and AXS connectivity, Apex lets you get the most out of your outings, without any distractions.FEATURESAXS connectivity for easy configuration, management, customization and reliability1x system compatible with 10-36-tooth cassettes or XPLR 10-44 or 11-44-tooth cassettesChain management ensures reliable, quiet operation of the drivetrain