SRAM X0 Eagle Transmission Cassette (XS-1295) - Thunder Mountain Bikes
SRAM X0 Eagle Transmission Cassette (XS-1295) - Thunder Mountain Bikes

X0 Eagle Transmission Cassette (XS-1295)

SKU: 00.2418.126.000

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

Experience the best-ever inboard and outboard shifting performance under load with the X0 Eagle Transmission (T-Type) Cassette. As an integrated and interdependent component of the Eagle Transmission system, this cassette and derailleur contact directly, ensuring perfect alignment on every compatible bike.

The X0 Transmission Cassette comes cloaked in an eye-catching Dark Polar finish and with electroless nickel plating that provides incredible resistance to corrosion and wear. The full X-Sync design is the secret sauce that ensures smooth shifts even under heavy pedaling. The 52-tooth cog steps down with improved gear progression with 44 and 38-tooth cogs in the low end, offering a massive 520% gear range compared to the Eagle drivetrain 10-52-tooth cassette.

With full approval for E-MTB use, this cassette is built for a 55mm chainline, delivering increased durability and precision with milder chain angles throughout the full range, low to high.  Plus, the clearly marked Setup Cog makes installation simple and foolproof. 

  • Full X-SYNC for best-ever inboard and outboard shifting performance under load
  • Optimized gear steps on the low end
  • 55mm chainline compatibility for a more moderate chain angle, longer wear, and greater precision
  • Setup Cog for foolproof setup
  • Features X-DOME with a lighter aluminum 12th gear
  • Fully E-MTB approved


Model: CS-XS-1295-A1
Gear Range: 10-52t
Cog Sizes 10-52t: N/A
Freehub Interface: SRAM XD
Material: Steel
Weight: 380 grams


The SRAM X0 Eagle Transmission Cassette 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, or X0 Eagle Transmission chains
Chainring: XX SLXX, or X0 Eagle Transmission chainring
Cassette: XX SL, XX, or X0 Eagle Transmission cassette
Controller: AXS POD Controller, AXS Pod Ultimate Controller
Crankset: XX SL, XX, or X0 Eagle Transmission cranksets
Freehub: SRAM XD compatible freehubs
PowerLock: Eagle Transmission PowerLocks only
Rear Derailleur:  XX SL, XX, or X0 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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Customer Reviews

Based on 1 review
Steve C.
SRAM Transmission - Wow!

So I wanted to try the new SRAM transmission on my new bike. I purchased the XO level cranks, cassette and chain. However, instead of purchasing the groupo, I wanted to go with the GX level derailleur because of how the battery is tucked out of the way. Since I was purchasing each piece separately, I went with the Ultimate pod controller over the standard. It was easy to set up and after one ride, I realized it wasn’t hype. This transmission really does shift better under load and it’s smooth and extremely quiet. Love the purchase and love the quick shipping by Thunder Mountain! 🤙🏼

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