SRAM XX1 Eagle 12-speed Rear Derailleur - 2020 Model

Item number: 78165

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SRAM XX1 Eagle 12-speed Rear Derailleur - 2020 Model - lunar/long
SRAM XX1 Eagle 12-speed Rear Derailleur - 2020 Model - lunar/long
SRAM XX1 Eagle 12-speed Rear Derailleur - 2020 Model - lunar/long
SRAM XX1 Eagle 12-speed Rear Derailleur - 2020 Model - lunar/long
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The XX1 Eagle 12-speed rear derailleur by SRAM shifts immediatly and keeps the chain under control

The SRAM rear derailleur of the XX1 Eagle series is designed for 12-speed drivetrains, is light thanks to its outer carbon cage and shifts precisely on Eagle cassettes with up to 52 teeth. Direct, precise shifting was a feature of previous generations of the XX1 Eagle rear derailleur, but here an optimisation of the cage shape ensures even more precise chain guidance and even more accurate shifting. The outer cage is made of carbon, which saves weight. The rear derailleur is designed for use with Eagle cassettes with 10-52 teeth, but also provides a flawless shifting experience when used with 10-50 teeth.


Series: XX1 Eagle
Application: Cross Country, All Mountain
Gearing: 12-speed
Mount: standard
Cassette Teeth (max.): 52 teeth
Compatibility: SRAM MTB 12-speed

Technical Information:

Derailleur Pulleys: 14 teeth
Outer Cage Material: carbon
Inner Cage Material: aluminium


- Eagle cassettes with 10-50 teeth
- Eagle cassettes with 10-52 teeth


- weight optimised with outer carbon cage
- revised cage architecture for optimum chain guidance
- swift, direct shifting operations
- easy mounting of chain and rear wheel thanks to Cage Lock™
- colour-coordinated with Eagle components


Developed specifically for 1-speed drivetrains, X-Actuation keeps shifting sharp and consistent across the entire cassette.

Roller Bearing Clutch™:
Rear derailleurs with Roller Bearing Clutch are equipped for rough and demanding terrain. Unimpressed by a ground full of roots, stones or rocks, the technology ensures a stable rear derailleur and prevents beating chains. The rear derailleur thus offers maximum drive stability without compromising on precision or performance.

Cage Lock™:
Thanks to the rear derailleur's Cage-Lock technology, the chain and the rear wheel can be fitted and removed really easily. Simply release the chain tension by pushing the shift cage forward and locking it.

The parallelogram design of X-Horizon derailleurs limits movement along the horizontal axis, eliminating ghost shifting and reducing needed shifting force. The large offset of the upper shifting roller ensures a constant chain distance in every gear for faster and more precise shifting.

The X-Sync tooth design is characterised by long, rounded and slanted tooth edges with a narrow profile. Derailleur pulleys with X-Sync technology support the chain guide and remain unaffected by dust and mud.

Colour Index:

lunar: dark grey

Manufacturer Part Number:



- 1 x SRAM XX1 Eagle 12-speed rear derailleur
- 1 x SRAM chain gap adjustment gauge


in stock 2 to 7 days up to 10 days Out of stock inform me
  • lunar/long

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