From ripping through singletrack to bombing our local spot in the foothills, the SRAM XX Eagle AXS Transmission Rear Derailleur is SRAM's high-end transmission derailleur for trail and enduro riding, and provides us with unmatched shifting performance. This T-Type derailleur mounts around the wheel axle, making direct contact with the cassette. This derailleur is only compatible with SRAM T-Type drivetrain s and works only with SRAM UDH derailleur hanger, which grips both sides of the frame to deliver the strongest connection we've seen.