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 InterfaceFull Mount attachment method creates a far stronger connection and grips both sides of the frameInstall and pair via the reliable and familiar standard AXS set-up and pairing procedureFeatures an overload clutch, tucked-in profile and Magic Wheel lower pulley that keeps spinning if an object becomes lodgedAdditional weight-saving cutouts in its carbon cage, a replaceable outer link and b-knuckle cover in a sleek black colorwayBattery not includedXXSL Eagle AXS12sp52Long1to1SIL440gUPC/EAN/GTIN: 710845892134