SRAM's new GX Eagle Transmission AXS Rear Derailleur leaves nothing to be desired, offering all the outstanding features you'd expect from an Eagle Transmission and then some. The GX Eagle Transmission derailleur has undergone impressive enhancements, including a revised battery position and a reconfigured gearbox that provides enhanced impact protection. To ensure long-lasting crisp shifting performance and a visually appealing appearance, hard-charging riders can replace the protective skid plates and two-piece outer link if necessary. This level of repairability sets a new standard for derailleur design. The GX Eagle Transmission derailleur also boasts the industry's first tool-free cage and clutch assembly, enabling effortless removal and upgradability. Its steel inner cage enhances durability, ensuring it's built to withstand the demands of real-world riders. Like all Eagle Transmission derailleurs, it features a groundbreaking Hangerless Interface, which mounts directly around the wheel axle and establishes direct contact with the cassette, eliminating the need for a hanger. The seamless integration and intuitive pairing process is easy, with or without the SRAM app. Thanks to the revolutionary Full Mount attachment method, this derailleur forms an exceptionally robust connection by gripping both sides of the frame. The GX Eagle Transmission holds its own and surpasses all expectations. It’s all in for all day. Details Speed: 12s T-Type Color: Dark Polar Cage Material: Steel Max Tooth: 52 Weight: 466g (without battery) AXS Battery and Charger are not included SRAM Eagle Transmission AXS Compatibility: The SRAM GX Eagle Transmission AXS Rear Derailleur is compatible with the following: Frameset: Any frame that fulfills the “UDH Specification” featuring a hanger-less interface can be upgraded. The SRAM UDH Bike Finder lists all UDH bikes that are compatible with Eagle Transmission. Battery: SRAM AXS Battery Bottom Bracket: SRAM DUB "Wide": BSA73 , PF89.5 , PF92 , PF30 MTB73 , BB30 MTB73 , BSA MTB68SP Chain: XX SL , XX , X0 or GX Eagle Transmission chains Chainring: XX SL , XX , X0 or GX Eagle Transmission chainring Cassette: XX SL , XX , X0 or GX Eagle Transmission cassette Controller: AXS POD Controller , AXS Pod Ultimate Controller Crankset: XX SL , XX , X0 or GX Eagle Transmission cranksets Freehub: SRAM XD compatible freehubs PowerLock: Eagle Transmission PowerLocks only Rear Derailleur: XX SL , XX , X0 or GX Eagle Transmission rear derailleur SRAM Eagle Transmission is not compatible with previous-generation Eagle components. However, Eagle Transmission T-Type chainrings are backward compatible with Eagle chains, so they can be used on the current Eagle drivetrains. Non-T-Type Eagle chainrings will not work with Eagle Transmission chains.