If you're looking to upgrade your current drivetrain, you'll get the most performance out of an electronic drivetrain. The SRAM GX T-Type Eagle AXS 12-Speed Rear Derailleur features a revised battery position and a reconfigured gearbox to better protect itself from impacts. To maintain crisp shifting and striking appearance throughout its entire lifespan, aggressive riders can replace both its protective skid plates and two-piece outer link, if needed, making this the most repairable derailleur we’ve ever made. It also features the first-ever tool-free cage and clutch assembly. A steel inner cage adds even more robustness and has a first-of-its-kind Hangerless Interface, mounting around the wheel axle itself and making direct contact with the cassette with no hanger required.