🏷️ Not eligible for coupons or discounts.
Crafted from top-tier materials with refined finishes, the S500/S200 Eagle AXS Upgrade Kit opens up the world of AXS to every type of rider. Leading the Eagle S-Series lineup, the S500 derailleur is built to perform across MTB, E-MTB, and gravel terrain alike. It works flawlessly with any AXS controller, including drop-bar shifters, delivering a flexible, premium upgrade for riders who prioritize durability and long-term performance. Pairing the S500 derailleur with the AXS Pod and the S200 cassette and chain, this kit offers a more understated, budget-friendly path into the AXS ecosystem.
S500 Eagle AXS Rear Derailleur - The Eagle AXS derailleur delivers wireless performance with effortless setup and seamless AXS integration. An Overload Clutch absorbs impacts and self-corrects without interrupting the ride, while full sealing handles any conditions.
S200 XG-1275 Cassette - A massive 520% gear range means you'll have the right gear for every climb and descent. Fully compatible across the Eagle ecosystem, it pairs seamlessly with both legacy and current Eagle components.
AXS POD Controller - The AXS Pod offers a lighter, more personalized alternative to standard AXS controllers. Updated ergonomics and wide adjustability combine with an intuitive two-button "click and fire" design that requires minimal input to activate.
S200 Eagle Chain - SRAM's 12-speed Eagle chain ties the whole system together, smooth, quiet, and built to keep up with every ride.
Power & Setup - AXS Battery, USB-C Charger (USB-C cord not included), and chaingap tool
| Model ID: | RD-S500-E-B1 |
| Speeds: | 12-Speeds |
| Shift Tech: | Wireless |
| Max Tooth: | 52t |
| Cage Material: | Aluminum |
| Drive Config: | 1x |
| Chain Tech: | Eagle |
| Model ID: | CS-XG-1275-C1 |
| Range: | 10-50t, 10-52t |
| Speed: | 12-Speed |
| Cog Sizes (10-50t): | 10,12,14,16,18,21,24,28,32,36,42,50t |
| Cog Sizes (10-52t): | 10,12,14,16,18,21,24,28,32,36,42,52t |
| Drivetrain Config: | 1x |
| Freehub Interface: | SRAM XD |
| Model ID: | EC-AXS-POD-D1 |
| Controller Type: | Wireless |
| Orientation: | Left, Right |
| Clamp: | Discrete |
| Rocker Paddle: | Optional, not included |
| Model ID: | CN-EAGL-S200-A1 |
| Speeds: | 12-Speed |
| Length: | 126 links |
| Chain Connector: | PowerLock (Included) |
| Pin: | Solid pin |
| Inner Link Finish: | Black Oxide |
| Outer Link Finish: | Nickel |
| E-Bike: | Yes |
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:
