SRAM GX Eagle Transmission AXS Rear Derailleur - Thunder Mountain Bikes

GX Eagle Transmission AXS Rear Derailleur

SKU: 00.7518.163.000

Regular price$400.00
Shipping calculated at checkout.
Rear Speeds
  • In stock, ready to ship
  • Backordered, shipping soon
  • Free shipping on all orders $59+

SRAM's new GX Eagle Transmission AXS Rear Derailleur leaves nothing to be desired, offering all the outstanding features you'd expect from an Eagle Transmission and then some. The GX Eagle Transmission derailleur has undergone impressive enhancements, including a revised battery position and a reconfigured gearbox that provides enhanced impact protection. To ensure long-lasting crisp shifting performance and a visually appealing appearance, hard-charging riders can replace the protective skid plates and two-piece outer link if necessary. This level of repairability sets a new standard for derailleur design.

The GX Eagle Transmission derailleur also boasts the industry's first tool-free cage and clutch assembly, enabling effortless removal and upgradability. Its steel inner cage enhances durability, ensuring it's built to withstand the demands of real-world riders. Like all Eagle Transmission derailleurs, it features a groundbreaking Hangerless Interface, which mounts directly around the wheel axle and establishes direct contact with the cassette, eliminating the need for a hanger. The seamless integration and intuitive pairing process is easy, with or without the SRAM app.

Thanks to the revolutionary Full Mount attachment method, this derailleur forms an exceptionally robust connection by gripping both sides of the frame. The GX Eagle Transmission holds its own and surpasses all expectations. It’s all in for all day.


Speed: 12s T-Type
Color: Dark Polar
Cage Material: Steel
Max Tooth: 52
Weight: 470 grams (without Battery)


AXS Battery and Charger are not included 

SRAM Eagle Transmission AXS Compatibility:

The SRAM GX Eagle Transmission AXS Rear Derailleur is compatible with the following:

Frameset: Any frame that fulfills the “UDH Specification” featuring a hanger-less interface can be upgraded. The SRAM UDH Bike Finder lists all UDH bikes that are compatible with Eagle Transmission.
Battery: SRAM AXS Battery
Bottom Bracket: SRAM DUB "Wide": BSA73PF89.5PF92PF30 MTB73BB30
Chain: XX SL, XX, X0 or GX Eagle Transmission chains
Chainring: XX SLXX, X0 or GX Eagle Transmission chainring
Cassette: XX SL, XX, X0 or GX Eagle Transmission cassette
Controller: AXS POD Controller, AXS Pod Ultimate Controller
Crankset: XX SL, XX, X0 or GX Eagle Transmission cranksets
Freehub: SRAM XD compatible freehubs
PowerLock: Eagle Transmission PowerLocks only
Rear Derailleur:  XX SL, XX, X0 or GX Eagle Transmission rear derailleur

SRAM Eagle Transmission is not compatible with previous-generation Eagle components. However, Eagle Transmission T-Type chainrings are backward compatible with Eagle chains, so they can be used on the current Eagle drivetrains. Non-T-Type Eagle chainrings will not work with Eagle Transmission 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 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 though FedEX and USPS.

Orders totaling over $59 are eligible to ship for free via an economy ground option of our choice.

Most bikes ship free within the continental US. Bike shipping to AK, HI, or PR is $250.

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.

Component & Gear Returns

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 installed or show wear of any kind.

Bike Returns

Returns or exchange requests for bikes must be requested by emailing us at 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 have a $200 restocking fee and the customer pays for return shipping.

Return Shipping

Customers may choose to use our provided flat-rate return shipping label at $9, or choose a carrier of their choice to handle their product return.

The $9 flat rate label will be deducted from the refund issued for the return. You can either print this label after requesting a return from the Order History in your Account profile, or you can request that we email you the label.

For all other return shipping methods, please email us at 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 we receive your returned item(s) and inspect the 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.


If you receive defective or damaged products or if we sent you the wrong products, please contact us using the phone number or email below.


To request a return, please log in to your customer account by clicking the customer account icon Profile icon in the top right of any page or visit

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 that 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 an email with shipping instructions and a return shipping label.


If you have any questions concerning our return policy, please contact us at:

(928) 282-1106   |

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