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XG-1299 XX1 Eagle 12-Speed Cassette

3 out of 5 stars
3 Reviews
Current price: $328.49 - $410.55 Original price: $483.00
Up to 32% off

Style & Size:


Why We Like The XG-1299 XX1 Eagle 12-Speed Cassette

As the lightest option in the Eagle lineup, the XX1 12-speed cassette is what we throw on our most elite dream builds. Available in 10 - 50 and 10 - 52t configurations, this cassette boasts a 500 - 520% usable gear range that propels us up grueling climbs and keeps us from spinning out when we're cranking at top speed. The cassette features SRAM’s X-Dome architecture to deliver one of the strongest and most consistent performing cassettes on the market, and it’s finished with Ti Nitride, which helps shed mud and ensure smooth, reliable shifting in all conditions while looking oh-so-slick in the process.


  • SRAM's lightest, highest-performing Eagle cassette
  • X-Dome architecture yields a high strength-to-weight ratio
  • Smoother, quieter shifting characteristics
  • Precision engineered for exceptional longevity
  • Works exclusively with SRAM Eagle drivetrain components and SRAM XD freehubs
  • Item #SRM009X
Cog Sizes
10 - 50t, 10 - 52t
Cog Material
[cog cluster] CNC-machined cromoly, [50/52t cog] aluminum
Freehub Type
Claimed Weight
12.4oz (352g)
Manufacturer Warranty
2 years

Overall Rating

3 based on 3 ratings

Review Summary

1 Stars - 1 reviews
2 Stars - 0 reviews
3 Stars - 1 reviews
4 Stars - 0 reviews
5 Stars - 1 reviews

Fits True To Size

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

What do you think about this product?


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5 out of 5 stars

December 28, 2023

Huge improvement

I've used it once or twice and have initial impressions

I have noticed a significant difference on the extreme uphills with the extra 2 teeth compared to a 10-50t cog. The gold color looks awesome and I am enjoying the full new SRAM drivetrain as compared to the cheaper NX I had on my bike from the factory.

user image
Brian F
1 out of 5 stars

November 18, 2022

The SRAM Factory In China Is Not Back

I returned this product before using it
6' 4"

I bought this cassette and it was defective. The threads were bent so when I attempted to install the cassette it was crooked. Boxed everything up and sent back to Backcountry.

3 out of 5 stars

September 20, 2020

52T, 52 Weeks?

I've used it once or twice and have initial impressions

As of this review, the new SRAM 52T is still fairly new and making it's way out to the masses. I recently upgraded to the AXS drivetrain and felt that it would be appropriate to bring on the new 52T cassette. I purchased it from my LBS on 8/12/2020 and was STOKED because I had some big climbs (3-4k) on the schedule for August into September. As expected, everything was flawless and worked with precision and the crispness you'd expect. 9/18/2020 - I was doing routine maintenance on the bike and while lubing the chain, I noticed one of the Tooth on the 52t cog was chipped. No more than 40 hours on the cassette, I was in complete shock. I like to think that I ride "hard" but it's a brand new cassette. I've got a warranty submission via LBS, I trust that SRAM will take care of me. I'll keep you guy posted.

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