XX SL Eagle Transmission AXS 1x12-speed Groupset - black/170.0 mm 34 teeth, 10-52
Item number: 91131

The XX SL Eagle Transmission AXS groupset by SRAM for an electronic 1x12-speed drivetrain on a cross-country bike

This weight-optimised SRAM XX SL Eagle Transmission AXS groupset provides the most important components for an electronic, wireless 1x12-speed drivetrain on a mountain bike. You get a crankset, an electronically-controlled rear derailleur with AXS controller, a cassette and a chain, all from the XX-SL series designed for low weight for cross-country use.

One of the special features of the Eagle Transmission is a derailleur hanger-free mounting of the electronic rear derailleur, which is mounted instead of the UDH universal derailleur hanger. The use of this groupset is therefore only possible on frames with this derailleur hanger. Direct mounting results in exact, tolerance-free alignment of the rear derailleur and an unprecedented harmony of rear derailleur and cassette. Adjustment bolts and limit screws are not required. In addition, the rear derailleur is designed to be extremely tough, so that it can easily withstand impacts from all sides and you can continue riding without any problems after a fall. Via the Magic Wheel, the lower derailleur pulley, the chain simply continues to run if a branch or something similar gets in the way. To reduce weight, the XX SL rear derailleur is equipped with a carbon cage. The AXS Pod Ultimate Controller can be mounted on the left or right side.
The lightweight XS-1299 cassette has three sprockets made of aluminium and eight made of steel and offers a wide range with 10-52 teeth, whose gear jumps have been optimised compared to Eagle cassettes. The X-SYNC design enables outstanding shifting performance even and especially under full load. Thanks to cassette mapping, the gear changes take place along designated shift ramps, which makes the process extremely smooth. The crank is particularly light and stiff thanks to hollow carbon arms and is combined with a Direct Mount chainring with 34 teeth. Like the cassette sprockets and derailleur pulleys, this is precisely matched to T-Type chains. The XX SL chain has a special flattop design reminiscent of road chains, but specially designed for Eagle Transmission. The outer flaps contain recesses to reduce weight.

A battery for the rear derailleur and a charging device are included. Use the groupset together with the AXS app to set it up, fine-tune the shifting behaviour and make and view other settings.

Information regarding the return of batteries and electrical equipment:

Information on the return and disposal of used batteries and electrical equipment can be found here.


XX SL Eagle Transmission AXS
Cross Country
Shifters & Derailleurs:
12-speed (wireless)


165.0 mm, 170.0 mm, 175.0 mm (34 teeth)
Rear Derailleur:
long cage (10-52)
Controller, clamp (closed)


  • Frame: UDH universal derailleur hanger required
  • Freehub: SRAM XD
  • Rear Over Locknut Dimension: 148 mm thru-axle (Boost)
  • RockShox Flight Attendant

Additional Components Needed:

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 the DUB BSA MTB bottom bracket.


  • lightweight mountain bike groupset for cross-country trails with wireless shifting
  • weight-optimised components, e.g. chain with recesses on outer links
  • mounting the rear derailleur directly on the wheel axle instead of a derailleur hanger
  • smooth shifting under full load
  • cassette with 52, 44 and 38 teeth as largest sprockets (instead of 52, 42 and 36 on Eagle) for more consistent gear shifting
  • crank with hollow carbon arms
  • largest three sprockets made of aluminium, others of steel
  • rear derailleur with carbon cage and Magic Wheel
  • lightweight, ergonomic shift controller with two shift buttons
  • use the AXS app for simplified setup, fine tuning and more
  • 55 mm chainline

Manufacturer Numbers:

165.0 mm 34 teeth, 10-52:
170.0 mm 34 teeth, 10-52:
175.0 mm 34 teeth, 10-52:


SRAM XX SL Eagle Transmission AXS 1x12-speed complete 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 master link
  • 1 x SRAM battery charger

  • 100 day return period
  • Online since 1998
  • Trusted Shop 4.89 / 5.00


  • black/165.0 mm 34 teeth, 10-52, in stock
  • black/170.0 mm 34 teeth, 10-52, in stock
  • black/175.0 mm 34 teeth, 10-52, in stock

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