Sram X01 DH A3 Rear Derailleur
Sram X01 DH A3 Rear Derailleur

Sram X01 DH A3 Rear Derailleur

Regular price RRP: £246.00 Sale price£223.30 Save 9%

🚚 FREE Standard UK Shipping on all orders over £20

The 7-speed X-HORIZON rear derailleur makes shifting smooth and reliable no matter where you ride. It eliminates vertical movement for faster shifting, reduced shift force and an end to ghost shifting.

  • Updated design of the rear derailleur incorporates our proven X-HORIZON design and new Type-3 ROLLER BEARING CLUTCH technology
  • 12-tooth X-SYNC pulley wheels
  • Large upper pulley offset automatically adjusts chain gap
  • Sealed cartridge bearings


  • Speed (RD): 7s
  • Cable pull ratio: Exact actuation
  • Cage (RD): Medium or Short
  • Max tooth: 28
  • Colour (RD): Red
  • Pulley bearings material: Steel
  • Cage material (RD): Aluminium


SRAM part reference:

RDR8128000 = 00.7518.128.000 (short cage)

RDR8128001 = 00.7518.128.001 (medium cage)

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 on all orders over £20.
  • Express shipping options are available on checkout.
  • We also offer Click & Collect from our Warehouse Mon to Fri 9:00 to 5:00 - kindly wait until we confirm your order is ready before visiting.


  • 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: RDR8128000

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