evo.com | SRAM Rear Derailleurs > The new SRAM GX Eagle AXS Transmission 12-Speed Rear Derailleur is the creme de la creme of components, a derailleur that refuses to settle for second place. With a design that prioritizes durability, upgradability, and tool-free convenience, it's the real-world rider's ultimate companion. This derailleur not only shifts gears seamlessly but also outperforms the competition with its innovative new Hangerless Interface and Full Mount attachment, proving that when it comes to performance, it's the star. Compatible with AXS Controller Inboard shift. Outboard shift. Dropper. Yes, use one of the touchpoints to control your Reverb AXS seatpost. Using both SRAM and RockShox AXS controllers opens a world of new possibilities. Hangerless Interface / Full Mount Attachment Method More strength, reliability and unrivaled performance. AXS Wireless electronic eTap shift logic for intuitive shifting, easy personalization, and reliability. X-SYNC(TM) SRAM X-SYNC(TM) 1X chain rings provide the highest level of performance and durability. The SRAM X-SYNC(TM) tall square teeth edges engage the chain earlier than traditional triangle shaped teeth. The sharp and narrow tooth profile, as well as rounded chamfer edges, help manage a deflected chain. To provide the best possible performance in muddy conditions, the X-SYNC(TM) chain rings have been designed with mud-clearing recesses for the inner chain links and rollers. Engineered in Germany, X-SYNC(TM) rings are an integral part of the SRAM 1X(TM) drivetrain. Uses Existing SRAM Batteries Sold Separately | SRAM GX Eagle AXS Transmission 12-Speed Rear Derailleur 2023 in Black