Introducing the X0 AXS Derailleur from SRAM. Bringing you tried and tested competition winning performance. In a ground breaking move SRAM have engineered the derailleur to mount around the wheel axle, therefore contacting the cassette directly in a first of its kind hanger-less interface. Hanger-less Interface, Full Mount attachment method. Competition proven strength and reliabilityInstall and pair via the reliable and familiar standard AXS set-up and pairing procedurePremium precision made to last. Overload Clutch. Replaceable B-Knuckle cover and outer linkWith its hanger-less interface and full mount attachment this creates a much stronger connection to the bike, as it grips both sides of the frame. These new derailleurs still feature the straightforward intuitive pairing and set-up as SRAM s previous AXS derailleurs. Its also incredibly robust and features an overload clutch to boost its resilience and a tucked-in profile that boasts several protection covers for key areas that can be replaced if necessary. It can even be upgraded to the XX skid plate. This is a true premium derailleur that s built to last. Specification:Speed (RD): 12sMax tooth: 52Colour (RD): BlackPulley bearings material : n/aCage material (RD): AluminiumWeight Based On: Engineering Estimate including BatteryWeight (g): 466Battery Not Included