🏷️ Not eligible for coupons or discounts.
With proven AXS wireless technology and GX's rugged durability, it’s Eagle at its best. Featuring an expanded 520% range (52t cassette capability), seamless compatibility with the rest of the ecosystem, an all-new AXS POD Controller, and the ability to customize with the AXS app, GX Eagle AXS™ is your entry point to the future.
GX Eagle AXS Rear Derailleur
AXS POD Controller
GX Eagle AXS Upgrade Kit Includes
Please reach out to us with any questions you may have about anything we sell. We want to make sure you get the right items 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 through FedEx and USPS.
Most orders totaling over $69 before tax are eligible to ship for free via an economy ground option of our choice.
Due to larger box sizes, handlebars, wheels, and other oversized items, an additional shipping fee will be applied.
Most bikes ship for only $200 within the continental US. Bike shipping to AK, HI, or PR is usually $350, but may incur additional fees depending on the exact delivery location.
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, depending on your location.
Should there be an issue with the item you bought, or if you no longer need your purchase, we will be happy to set up a return.
Returns may be requested within sixty (60) days of the delivery date. All returned items must be received in new, unused, and uninstalled 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.
Returns or exchange requests for bikes must be requested by emailing us at sedona@thundermountainbikes.com within fifteen (15) days from the date of delivery. Bikes must be in un-ridden condition. Custom-built bikes may not be returned. Returned bikes incur a $200 restocking fee, and the customer is responsible for the return shipping costs.
Customers are responsible for return shipping fees and may choose the carrier of their choice to handle their product return. We no longer provide shipping labels directly.
For any return shipping questions, please email us at sedona@thundermountainbikes.com after submitting your return request so that we can confirm the shipping information you should use to return your item(s).
We will process your return after receiving your returned item(s) and inspecting their condition. Please allow at least seven (7) days from the receipt of your item to process your refund. We will notify you by email when your return has been processed. All refunds will be returned to the original payment method. No store credit or other refund methods are available.
If you receive defective or damaged products or if we sent you the wrong item(s), please contact us using the phone number or email below.
To request a return, please log in to your customer account by clicking the 
Profile icon in the top right of any page or visit account.thundermountainbikes.com.
1. In the Email field, enter your email address and click Continue.
2. In your email account, open the email sent from our store and copy the six-digit verification code included in the email.
3. Go back to the online store and enter a six-digit verification code to log in.
4. Find and click on the order you want to submit a return for.
5. If your order has more than one item, select only the items you want to return.
6. Select a return reason and add a note for the store if needed.
7. Click Request Return.
Once your return request is approved, you will receive a confirmation by email.
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!
Increíble.
After checking with my local shops on the cost of purchasing this upgrade including installation, I decided to look at Thunder Mountain for the kit and attempt the install myself (there are DIY videos on YouTube). Got a great price from TM, installed the new AXS derailleur kit, and it worked perfectly...no adjustments necessary. Don't know whether it was a fluke or not, but what a great experience from ordering, delivery, and installation!
Great service, shipping and product. Also, my friends have rented bikes here when visiting Sedona and were very happy.
I’ve order from Thunder Mountain Bikes three it four times now. Everything was packed nicely and fast delivery. I would recommend.
Great Product!
Excellent customer service guiding me to the correct product for my bike. Electronics shifting has been awesome!
