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Sram Rear Derailleur Gx Eagle 12 Speed Max 52T

Code: RD8137000
  • Now $110.59
Item in Stock   |   Usually dispatched within 48 hours
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Riders want the derailleur to do its job shifting on command, whether under climbing load or the stage finish. The GX Eagle™ 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 compliment 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.


  • 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.

Speed (RD): 12s
Cable pull ratio: X-actuation
Cage (RD): Long
Max tooth: 52
Color (RD): Lunar
Pulley bearings material: Steel
Cage material (RD): Aluminum

All out products are shipped by DHL/UKMail providing unprecedented reliability and speed.

Shipping on all domestic orders over £40.00 (excluding bikes and home trainers) for delivery within the UK is completely FREE!

Bike and Home Trainers and oversize Goods FREE - DHL/UKMail

To qualify for free shipping:

Your delivery address must be within the United Kingdom Mainland (Channel Islands, Isle of Mann and Scotish Isles are not Mainland)

Your order, after any discounts, must be £40.00 or over

For all other orders including those under £40.00 there is a postage charge of £5.00

European & International delivery charges are zoned out as follows.(Bikes are not shipped internationally)

Zone 1 - Belgium, Luxemborg, France, Netherlands, Germany, Republic Of Ireland, Northern Ireland, Chanel Islands, North Scotland

Zone 2 - Austria, Liechtenstein, Denmark, Switzerland

Zone 3 - Czech Republic, Slovakia, Italy, Spain

Zone 4 - Estonia, Portugal, Finland, Slovenia, Hungry, Sweden, Poland

Zone 4 - Bosnia-Herzegovina, Lithuania, Bulgaria, Montenegro, Croatia, Norway, Greece, Romania, Iceland,Serbia, Latvia

International Zones

Delivery costs will be clearly stated on the checkout page, though you will need to register (to provide your delivery address) in order to see the delivery costs.

If you have any questions about delivery charges, times or none delivery please do not hesitate to get in touch by or by telephone on +44 (0)1782 768622. Handling is normally 48 hours, but at busy periods this may be extended but we will endeavour to process your order within 5 working days, please contact us for more details


Showing our 2 Rear Derailleur Gx Eagle 12 Speed Max 52T reviews with an average rating of Excellent. Would you like to write a review?
Review Summary - 5 out of 5 based on 2 ratings.
  • Overall
  • Fit
  • Quality
  • Value for Money
  • Review Date - 11th May 2021
  • Comments - Amazing piece of kit. The 52-tooth cog is formidable on the new SRAM Eagle cassette (it makes some of the "get-off-and-push" hills totally rideable) but you will need this new derailleur to make it work well. This derailleur is a beautiful piece of kit and delivered in packaging that makes you feel like youre opening something special. Gear changes are crisp and confident and whereas i scoffed when i read the colour was "Lunar" i ate humble pie when i saw how sleek it looked. Delivered quickly and in perfect condition from Swinnerton. If you are looking for an upgrade this is a great shout
  • Would you recommend this product? - Yes

May 11, 2021
chris b
  • Overall
  • Fit
  • Quality
  • Value for Money
  • Review Date - 11th March 2021
  • Comments - Good price, very quickly delivered and in the usual slightly OTT SRAM packaging. I was replacing a worn one (10-50) and this fitted and worked perfectly. The new alignment tool is great, really accurate. Feels like I have a new bike.
  • Would you recommend this product? - Yes

March 11, 2021
Showing our 2 Rear Derailleur Gx Eagle 12 Speed Max 52T reviews with an average rating of Excellent. Would you like to write a review?