The XX Eagle T-Type AXS(TM) 12-Speed rear derailleur foundationally changes the relationship between cassette and derailleur. Engineered as integrated interdependent transmission components the T-Type derailleur mounts around the wheel axle itself contacting the cassette directly with a first-of-its-kind Hangerless Interface. Its game-changing Full Mount attachment method creates a far stronger connection and grips both sides of the frame (Requires frame with UDH interface). This XX T-Type rear derailleur features the same intuitive pairing and set-up procedure as Eagle AXS(TM) derailleurs.Tucked-in profile houses replaceable skid plates that enhances dependability in high-pressure racing environmentsTo further its performance the lower pulley called "Magic Wheel" keeps spinning if an object becomes lodgedOnly compatible with frames featuring a UDH rear derailleur type interfaceFeatures an overload clutch accommodates common maintenance and features that real world riders really appreciateExceptional shifting performance and unprecedented strengthAluminum cageBattery Not Included