SRAM RED XPLR AXS Rear Derailleur - For RED XPLR 1x, 13-Speed, 46t Max, UDH Hangerless, (Battery Not Included),Gravel throws just about everything at your bike, and the RED XPLR AXS rear derailleur will happily take it all. Bring on the sticks, stones, and airport baggage abuse because the Full Mount derailleur design fits onto frames with the hangerless interface to make for the most robust and reliable gravel drivetrain possible (Requires frame with UDH interface). No adjustment screws mean setup is simpler than ever. And a surprise stick is no match for the