Sram: The XX Eagle Transmission 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. The new transmission derailleurs feature the same intuitive pairing and set-up procedure as our Eagle AXS derailleurs. 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. Additionally, the XX Eagle Transmission derailleur features an overload clutch, accommodates common maintenance and features that real world riders really appreciate. This is unrivaled shifting performance, unprecedented strength. The XX Eagle Transmission derailleur delivers.FEATURESHangerless Interface, Full Mount attachment method. More strength, reliability and unrivaled performance.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. SPECIFICATIONSSpeed (RD): 12sCable pull ratio: n/aCage (RD): n/aMax tooth: 52Color (RD): SilverPulley bearings material: n/aCage material (RD): Aluminum