Sram GXDH A3 Rear Derailleur

Sram GXDH A3 Rear Derailleur

Regular price RRP: £113.00 Sale price£97.22 Save 14%

🚚 FREE Standard UK Shipping on this item

We understand that the gnarly line requires a lot more focus than a lap of the supermarket.

 That’s why we packed the GX DH 1x X-HORIZON rear derailleur with World Championship-winning features, and gave it a price tag that speaks more to the Wednesday Night Championships.This is a DH derailleur that is easier to shift, is incredibly precise and keeps the unwanted noise of chain slap to a minimum, so you can concentrate on the sweet feeling of nailing your line. GX DH - Get Some.

  • The GX 1x X-HORIZON Rear Derailleur is an integral part of the SRAM 1x DH drivetrain system
  • This is the most affordable full-featured, dedicated 1x DH rear derailleur in the industry
  • X-ACTUATION for precise and dependable 7-speed performance
  • Fully compatible with the SRAM X01 DH drivetrain
  • X-HORIZON design that reduces shift force, ghost shifting and cage slap
  • 12-tooth X-SYNC pulley wheels
  • Speed (RD): 7s
  • Cable pull ratio: Exact actuation
  • Cage (RD) Medium
  • Max tooth: 28
  • Colour (RD): Black
  • Pulley bearings material: Steel
  • Cage material (RD): Aluminium

SRAM part reference

RDR8129000 = 00.7518.129.000

We ship fast! Our stock levels are updated live and most orders placed before 14:00hrs are shipped same-day (Monday to Friday).

Each product page will show estimated dispatch times.


  • Standard UK shipping is FREE*.
  • Express shipping options are available on checkout.
  • We also offer Click & Collect from our Warehouse Mon to Fri 9:00 to 5:00 so if you are near to us at RG10 9SH why not come over and collect it 👍🏻


  • Europe standard shipping is £3.99 with an Express option available.
  • We have had to disable shipping to the EU. We hope to be able to resume shipping to more EU destinations shortly.


  • We have had to suspend shipping outside of the UK. We hope to be able to resume shipping worldwide shortly.

We offer a no-quibble 30-days refund policy*. There's no need to contact us before returning your item(s). Simply send it back to the following address:

Sprocket and Gear (Returns), Kingfisher Works, Tag Lane, Hare Hatch, RG10 9SH, United Kingdom

Be sure to include your order number and reason for return. Sorry, but we can't cover, or contribute to, the cost of the return.

* To read our full returns/refund policy please click here.

SKU: RDR8129000

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