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SRAM GX Eagle 12spd Rear Derailleur - Max 52T
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SRAM GX Eagle 12spd Rear Derailleur - Max 52T


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Mfg PartNum: 00.7518.137.000
SALE: $94.50
MSRP: $135.00
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Precision Shifting On Command

Riders want the derailleur to do its job shifting on command, whether under climbing load or the stage finish.

The SRAM GX Eagle™ 12spd Rear Derailleur gets it done with an updated cage architecture that improves chain management.

Refined to work with the new 10-52t cassettes, it's also backwards compatible for the 10-50t versions. Giving riders choice, because that's how it should be.

Finished with the new GX Eagle™ master colorway to complement any cassette and chain colorway a rider wants from the Eagle™ Colorsystem.

Further proof that the GX Eagle™ derailleur is there for one thing - to do the job.

Cage Lock

With CAGE LOCK technology in the rear derailleur, wheel removal and installation, as well as chain installation, becomes faster and simpler. Just push the cage forward to create slack and lock it into place.

Roller Bearing Cluth

ROLLER BEARING CLUTCH technology eliminates derailleur bounce and chain slap without sacrificing precision.


Developed specifically for SRAM 1x, X-ACTUATION keeps shifting sharp and consistent across the entire cassette.


This rear derailleur's "straight parallelogram" design limits all movement to the horizontal axis, which makes ghost shifting impossible while also reducing shift force. For quicker, more exact shifting, the large upper pulley offset design maintains a constant chain gap across all gears.


SRAM X-SYNC 1x chainrings provide the highest level of performance and durability. The SRAM X-SYNC tall square teeth edges engage the chain earlier than traditional triangle shaped teeth. The sharp and narrow tooth profile, as well as rounded chamfer edges, help manage a deflected chain. To provide the best possible performance in muddy conditions, the X-SYNC chainrings have been designed with mud-clearing recesses for the inner chain links and rollers. Engineered in Germany, X-SYNC rings are an integral part of the SRAM 1x drivetrain.


Eagle technology represents SRAM's newest 1x drivetrain technology. Eagle is a lighter, simpler, more durable, and easier to use drivetrain. Eagle features all-new 1x components, engineered for even greater durability and performance while maintaining a significant weight advantage over other drivetrain solutions. Eagle technology also provides an expanded gear range of 520%, which is equal to 2x11 drivetrains.


  • Backwards compatible, works with both 10-50t and new 10-52t cassettes.
  • Updated cage architecture provides better chain retention and precise shifts.
  • Comes in GX Eagle™ master colorway as part of Eagle™ Colorsystem and goes with all colors of Eagle cassettes & chains - from Black to Gold to Rainbow, to HardChrome and new Copper.
  • Cage (RD) - Long
  • Cable Pull Ratio - X-actuation
  • Speed (RD) - 12s
  • Color (RD) - Lunar
  • Cage Material (RD) - Aluminum
  • Pulley Bearings Material - Steel
  • Max Tooth - 52

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.


Mfg PartNum: 00.7518.137.000 

Actuation: Mechanical 

Discipline: MTB 

Mount Type: Standard Rear Hanger 

Speed: 12 

Mfg Warranty: 24 Mo. Parts

Warranty URL: https://www.sram.com/en/service/warranty


Ordered by Most Relevant First
5 stars
4 stars
3 stars
2 stars
1 stars
Reviewed 4/10/2024
by John
Cycling Enthusiast
Oregon, Washington, Idaho, Utah
Value Rating
Overall Rating
Works perfect

I have converted 2 MTB and 2 gravel bikes to 1x12 for my wife and I. I couldn't be happier. My wife no longer has to nash her teeth about shifting and can climb longer with the wider gear range. Sram components have made it easy.

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Reviewed 5/25/2023
by T
Cycling Enthusiast
Value Rating
Overall Rating
1 of 1 customers found this review helpful.
Upgrade time

It was time to upgrade the SX rear mec that came on the bike. Niner, Sir Nine hardtail. Right away I noticed easier shifting and that buttery smooth feel I was looking for compared to the SX. Bike parts are expensive no matter what, grab a deal here anytime.

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Reviewed 8/8/2022
by FJL71
Cycling Enthusiast
Long Island
Value Rating
Overall Rating
Great For 1X upgrade

Upgrading From 2X10 To 1X12

love how sram Derailleurs shift

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Reviewed 5/3/2021
by Mike
Overall Rating
1 of 1 customers found this review helpful.
Great derailer

Shifts great and looks great. Couldn't be happier with it.

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