SRAM XX Eagle Transmission AXS 1x12-speed E-MTB groupset

The SRAM XX Eagle Transmission AXS groupset for an electronic 1x12-speed drivetrain on trail and enduro e-mountain bikes

This SRAM XX Eagle Transmission AXS groupset delivers the main components for an electronic, wireless 1x12-speed drivetrain on an e-mountain bike with a mount for a four-arm chainring with a 104 mm bolt circle. It includes a chainring, an electronically actuated rear derailleur with AXS controller, a cassette, and a chain, all from the XX series for all-mountain trails and enduro race tracks.

One special feature of the Eagle Transmission is that the electronically actuated rear derailleur mounts without a derailleur hanger, attaching in place of the UDH universal derailleur hanger. This groupset can therefore only be used on frames fitted with this hanger. Direct mounting results in precise, tolerance-free derailleur alignment and an unprecedented harmony between derailleur and cassette. No limit or barrel-adjuster screws are needed. The derailleur is also built to be extremely tough, easily shrugging off impacts from any direction so you can keep riding after a crash without a problem. Thanks to the so-called Magic Wheel, the lower derailleur pulley, the chain simply keeps running even if a branch or similar object gets caught in it. The accompanying AXS Pod Ultimate controller can be mounted on the left or right, as you prefer.

The XS-1297 cassette has one aluminum and eleven steel sprockets and offers a wide 10-52 tooth range, with gear steps optimized compared to earlier Eagle cassettes. The X-SYNC design delivers outstanding shifting performance, especially under full load. Thanks to so-called cassette mapping, shifts take place along dedicated shift ramps, making the process exceptionally smooth. Like the cassette sprockets and derailleur pulleys, the 34-tooth chainring is precisely matched to T-Type chains. The XX chain has a distinctive flattop design reminiscent of road chains but engineered specifically for Eagle Transmission. It is especially durable, featuring a hard-chrome finish and weight-saving hollow pins.

A battery for the rear derailleur and a charger are included. Use the complete groupset together with the AXS app to set it up, fine-tune shifting behavior, and view and adjust further settings.

Note on replacing components on e-bikes: before replacing any components on your e-bike, please refer to the guide for component replacement on CE-marked e-bikes / pedelecs with pedal assist.

Specifications: Series: XX Eagle Transmission AXS. Application: All Mountain, Enduro. Drivetrain: 12-speed (wireless). Components: Cassette: 10-52. Rear derailleur: long cage (10-52). Shifter: controller, clamp band (closed). Compatibility: Chainring mount: 104 mm bolt circle, 4-arm. Frame: UDH universal derailleur hanger mandatory. Freehub: SRAM XD. Rear spacing: 148 mm thru-axle (Boost). Features: complete mountain bike groupset for wireless shifting on e-mountain bikes with a matching chainring mount; 34-tooth e-bike chainring; rear derailleur mounts directly on the wheel axle instead of a derailleur hanger; smooth shifting under full load; cassette with 52, 44, and 38 teeth as its largest sprockets (instead of 52, 42, and 36 on Eagle) for a more consistent gear progression; largest sprocket made of aluminum, the rest of steel; chain with hollow pins and hard-chrome finish; rear derailleur with Magic Wheel; lightweight, ergonomic shift controller with two paddles; use of the AXS app for simplified setup, fine-tuning, and more; 55 mm chainline. Manufacturer part number: 00.7918.280.002

Package contents: SRAM XX Eagle Transmission AXS 1x12-speed e-MTB complete groupset, consisting of:

1 x SRAM Eagle Transmission E-MTB chainring, 104 mm bolt circle 1 x SRAM XS-1297 cassette 1 x SRAM XX Eagle Transmission AXS rear derailleur 1 x SRAM eTap / AXS battery 1 x SRAM AXS Ultimate controller with CR2032 battery 1 x SRAM XX Eagle Transmission chain 1 x SRAM PowerLock T-Type chain connector 1 x SRAM battery charger