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SRAM GX Eagle Transmission upgrade kit converts mechanical Eagle 90 and 70 to AXS electronic shifting. Includes GX RD body, Pod controller and battery.

SRAM GX Eagle Transmission upgrade kit converts mechanical Eagle 90 and 70 to AXS electronic shifting. Includes GX RD body, Pod controller and battery.

SRAM

SRAM GX Rear Mech/Derailleur Upgrade Kit - Mechanical Eagle 90/70 to Electronic

£459.00 £570.00 19% off
Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined

No Hassle Returns

Returns

Shop with confidence. If you've ordered the wrong size or you're not happy with a purchase it's not a problem. We want to help you find the right products to get the most out of your cycling. Simply return the item to us within 30 days in unused condition with all the packaging and we'll replace it or refund you. Kindly note that refunds can take up to 14 working days to process. *InvisiFrame kits are non-returnable/non-refundable.

We do not offer free returns because we aim to keep the cost of the product as low as possible. However, if the goods are found to be faulty, damaged or not as described, please contact us to discuss the returns process.

Call us if it's a bike as we can help arrange collection. Tel 01752 849315 or info@certini.co.uk

There is a downloadable returns form to complete and return with your goods.

Returns Address:

Certini Bicycle Company
10 Kingsmill Road
Tamar View Industrial Estate
Saltash
PL12 6LD

Under the Consumer Rights Act you have a legal right to reject goods that are of unsatisfactory quality, unfit for purpose or not as described, and get a full refund - as long as you do this quickly. This right is limited to 30 days from the date you buy your product.


CHRISTMAS RETURNS

We want to take the hassle out ofChristmasfor you so we have extended ourReturnsperiod during this time. Any products purchased between 1st December 2025 and 24th December 2025 can be returned until 18th January 2026. Please refer to ourreturnspolicy before returning your items.

SRAM GX Rear Mech/Derailleur Upgrade Kit - Mechanical Eagle 90/70 to Electronic

Brand:SRAM

Code:SGS8198000

SRAM GX Eagle Transmission Rear Derailleur Upgrade Kit – Convert Mechanical Eagle 90 & 70 to AXS Electronic

The SRAM GX Eagle Transmission Rear Derailleur Upgrade Kit is the easiest way to upgrade your mechanical Eagle 90 or Eagle 70 drivetrain to wireless AXS electronic shifting. Designed as a seamless entry point into the SRAM AXS ecosystem, this kit allows riders to experience the precision, reliability and clean setup of GX Eagle Transmission electronic shifting without replacing their entire drivetrain.

This upgrade kit includes an AXS-enabled GX Eagle Transmission derailleur body, AXS Pod Controller, AXS battery and charger, and an Eagle T-Type PowerLock for secure chain reinstallation. Simply transfer the threaded cage assembly and derailleur mount bolt from your existing Eagle 90 or 70 mechanical derailleur onto the new GX derailleur body, and you’re ready to ride wirelessly.

Built exclusively for Hangerless Interface (UDH) frames and T-Type Transmission components, this GX Eagle upgrade delivers crisp shifting performance, improved durability, and the signature robustness of SRAM Transmission. Finished in a distinctive black anodised finish, it’s the perfect upgrade for trail and all-mountain riders looking to modernise their setup.

  • SRAM GX Eagle Transmission rear derailleur upgrade kit
  • Converts mechanical Eagle 90 & Eagle 70 to AXS electronic shifting
  • Includes GX AXS derailleur body, AXS Pod Controller, AXS battery, charger & cable
  • Supplied with Eagle T-Type PowerLock for chain installation
  • Re-use existing threaded cage assembly and derailleur mount bolt
  • Compatible with UDH (Hangerless Interface) frames only
  • T-Type Transmission components only
  • Clean, reliable wireless electronic shifting performance
  • Distinctive black anodised finish

Technical Information
  • Model ID
    RD-UPK-GXTE-A1
Sizing Information
Professional Opinion
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