With proven AXS wireless technology and the rugged durability of GX, it’s Eagle at its best. Featuring an expanded 520% range (52t cassette), seamless compatibility with the rest of the ecosystem, and the ability to customize with the AXS app, GX Eagle AXS™ is your entry point to the future.
GX Eagle AXS Rear Derailleur
- Speeds: 12
- Color: Lunar
- Cage Material: Steel
- Pully bearings: Steel
- Max cassette teeth: 52
GX Eagle AXS Controller
- Orientation: Right
- Control points: Double
- Clamp: Discrete
- Lever adjust: No
- Multi-position: Yes
- Battery size: CR2032
- Color: Black
GX Eagle AXS Upgrade Kit Includes
- Rear Derailleur with Battery
- Chain gap tool
**Ground shipping only
- Cassette: Sram Eagle 12-speed cassettes
- Chain: Sram Eagle 12-speed chains
Please reach out to us with any questions you may have on anything we sell. We want to make sure you get the right part the first time. Our lifelong riders at Thunder Mountain Bikes are knowledgeable and would love to talk to you!
We currently offer both economy and expedited shipping options though FedEX and USPS.
Orders totaling over $49 are eligible to ship for free via an economy ground option of our choice.
If you're in need of something super-quick, please contact us directly. We may be able to overnight your order with an additional fee and depending on your location.
Should there be an issue with the item you bought, or you no longer need your purchase, we will be happy to set up a return.
All returns must be requested within sixty (60) days of the fulfillment date (i.e. the date we printed the shipping label and boxed up your order.) All returned items must be received in new and unused condition, with the original tags and labels attached, and in the original packaging. We cannot accept returns on any items that have been installed or show wear of any kind.
To request a return, please visit: returns.thundermountainbikes.com and follow the steps to return eligible items from your order.
After receiving your return and inspecting the condition of your item, we will process your return. Please allow at least seven (7) days from the receipt of your item to process your return or exchange. We will notify you by email when your return has been processed.
For all Special Order items, there is a 25% restocking fee. Special Order items are those that we do not currently stock.
For defective, damaged, or if we sent you the wrong products, please contact us using the phone number or email below.
If you have any questions concerning our return policy, please contact us at:
With it being such a challenge to find new bikes, upgrading my 5 year old Yeti SB6c with electronic shifting seemed like a good idea and now that I've got a few rides with the GX Eagle AXS I couldn't be happier! The installation was a snap although it took awhile to dial things in. The shifting is very sensitive to the B-screw adjustment and the jig that comes with the upgrade is great but it's definitely a 2 person job since the adjustment needs to be done under sag and you'll need a second pair of eyes to get it right! The SRAM set up video on YouTube is a great resource. On the trail, the shifting is fast and precise but it does take a bit of time to get the new "muscle memory" for how the AXS shifter works vs. the mechanical version. Overall, I'd say the upgrade was well worth it!