The XX SL Eagle Transmission (T-Type) Cassette is the key to achieving the best-ever inboard and outboard shifting performance under load with Eagle Transmission. Its full X-Sync design ensures that the harder you pedal, the better it shifts, resulting in unrivaled precision.
This is SRAM's lightest Eagle cassette to date, and it is built to last and provide maximum efficiency. The new-gen design is fully machined, with hardened steel X-Dome architecture for gears 4-12 and an ultralightweight, all-aluminum Spider Cog for gears 1-3.
Designed to work in conjunction with the XX Eagle Transmission Derailleur, the cassette and derailleur are engineered as integrated and interdependent transmission components that make direct contact, ensuring perfect alignment on every bike. With a massive 520% gear range, the 52-tooth cog steps down with improved gear progression with 44 and 38-tooth cogs in the low end, outperforming the Eagle drivetrain's 10-52-tooth cassette. The Setup Cog is clearly marked, making installation simple and foolproof. Experience the ultimate shifting performance with the XX SL Eagle Transmission (T-Type) Cassette.
- New-gen design is SRAM's lightest ever 10-52T cassette due to the ultralightweight, all-aluminum Spider Cog
- Full X-SYNC for best-ever inboard and outboard shifting performance under load
- Optimized gear steps on low end
- 55mm chainline compatibility for more moderate chain angle, longer wear and greater precision
- Setup Cog for fool-proof set up
- Utilizes well-accepted and broadly available XD driver body
Details:
| Model: | CS-XS-1299-A1 |
| Gear Range: | 10-52t |
| Cog Sizes 10-52t: | N/A |
| Freehub Interface: | SRAM XD |
| Material: | Steel/Aluminum |
| Weight: | 345 grams |
SRAM Eagle Transmission AXS Compatibility:
The SRAM XX SL 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": BSA73, PF89.5, PF92, PF30 MTB73, BB30 MTB73, BSA MTB68SP |
| Chain: | XX SL, XX, or X0 Eagle Transmission chains |
| Chainring: | XX SL, XX, 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!
Shipping
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.
RETURNS
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 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 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 sedona@thundermountainbikes.com after submitting your return request so that we can confirm the shipping information you should use to return your item(s).
REFUNDS
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.
EXCEPTIONS
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.
RETURN PROCESS
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 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.
QUESTIONS ABOUT RETURNS?
If you have any questions concerning our return policy, please contact us at:
