SRAM XX SL Eagle Transmission AXS 1x12-speed groupset

SRAM's XX SL Eagle Transmission AXS groupset for an electronic 1x12 drivetrain on cross-country bikes

This weight-optimized SRAM XX SL Eagle Transmission AXS groupset delivers the key components for an electronic, wireless 1x12 drivetrain on mountain bikes. You get a crankset, an electronically actuated rear derailleur with AXS controller, a cassette, and a chain, all from the ultra-lightweight XX SL series designed for cross-country use.

One of the standout features of the Eagle Transmission is its hanger-free mounting: the electronically actuated rear derailleur attaches directly in place of the UDH universal derailleur hanger. As a result, this groupset can only be used on frames equipped with this hanger. Direct mounting delivers precise, tolerance-free derailleur alignment and an unprecedented harmony between derailleur and cassette. No limit or barrel adjustment screws are needed. The derailleur is also built to be extremely rugged, easily shrugging off impacts from any direction so you can keep riding after a crash without issue. Thanks to the so-called Magic Wheel, the lower pulley wheel, the chain simply keeps running even if a branch or similar obstacle gets caught in it. To save weight, the XX SL derailleur is equipped with a carbon cage. The accompanying AXS Pod Ultimate controller can be mounted on either the left or right side, as you prefer.

The lightweight XS-1299 cassette has three aluminum sprockets and eight steel sprockets, and with a 10-52 tooth range it offers wide gearing whose steps have been optimized compared with standard 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. The crankset is especially light and stiff thanks to hollow carbon arms, and is paired with a direct-mount chainring with 34 teeth. Like the cassette sprockets and derailleur pulleys, this chainring is precisely matched to T-Type chains. The XX SL chain has a distinctive Flattop design reminiscent of road chains, but purpose-built for Eagle Transmission. Its outer plates feature cutouts to save weight.

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

Specifications: Series: XX SL Eagle Transmission AXS Intended use: Cross Country Drivetrain: 12-speed (wireless) Components: Crank: 165.0 mm, 170.0 mm, 175.0 mm (34 teeth) Cassette: 10-52 Rear derailleur: long cage (10-52) Shifter: controller, clamp band (closed) Compatibility: Frame: UDH universal derailleur hanger required Freehub: SRAM XD Rear hub width: 148 mm thru-axle (Boost) Rock
Shox Flight Attendant Additional requirement: the bottom bracket is not included. SRAM recommends the DUB Pressfit 30 MTB, DUB Pressfit MTB 41 x 89.5-92 mm, DUB BB30 MTB 42 x 73 mm, or DUB BSA MTB bottom bracket.

Features: lightweight complete mountain bike groupset for cross-country trails with wireless shifting weight-optimized components, such as a chain with cutouts on the outer links derailleur mounts directly to the wheel axle instead of a hanger smooth shifting under full load cassette with 52, 44, and 38 teeth as its largest sprockets (instead of 52, 42, and 36 on standard Eagle) for a more consistent gear progression crankset with hollow carbon arms largest three sprockets in aluminum, the rest in steel derailleur with carbon cage and Magic Wheel light, ergonomic shift controller with two shift buttons use of the AXS app for simplified setup, fine-tuning, and more 55 mm chain line Q-factor: 174 mm manufacturer part numbers: 165.0 mm 34 teeth, 10-52: 00.7918.166.002 170.0 mm 34 teeth, 10-52: 00.7918.166.001 175.0 mm 34 teeth, 10-52: 00.7918.166.000 Package contents: complete SRAM XX SL Eagle Transmission AXS 1x12 groupset, consisting of:

1 x SRAM XX SL Eagle Transmission AXS crankset 1 x SRAM XX SL Eagle Transmission chainring 1 x SRAM XS-1299 cassette 1 x SRAM XX SL Eagle Transmission AXS rear derailleur 1 x SRAM eTap / AXS battery 1 x SRAM AXS Ultimate controller with CR2032 battery 1 x SRAM XX SL Eagle Transmission chain 1 x SRAM PowerLock T-Type quick link 1 x SRAM battery charger