The XX T-Type derailleur mounts around the wheel axle itself, contacting the cassette directly with a first-of-its-kind Hangerless Interface. The Full Mount attachment method creates a far stronger connection and grips both sides of the frame. A tucked-in profile houses replaceable skid plates that enhances dependability in high-pressure racing environments. To further its performance, the lower pulley called Magic Wheel keeps spinning if an object becomes lodged.* Hangerless Interface, Full Mount attachment method (UDH compatible frame required)* Install and pair via the reliable and familiar standard AXS set-up and pairing procedure.* Chain Management Features. Magic Wheel. Overload Clutch. Replaceable skid plates.* Battery Not Included* SRAM Model ID: RD-XX-E-B1