XG-1299 XX1 Eagle 12-Speed Cassette
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XG-1299 XX1 Eagle 12-Speed Cassette delivers SRAM’s lightest, most advanced performance for elite-level mountain riding
What Our Gearhead® Experts Are Saying:
"If you're building up a dream bike or chasing grams on race day, the XG-1299 is a no-brainer. It's impressively light, shifts smoother than anything else in the Eagle lineup, and the Ti Nitride finish adds just the right amount of flash and function."
The SRAM XG-1299 XX1 Eagle 12-Speed Cassette is engineered for riders who demand the best from their drivetrain. Built for Eagle setups and compatible exclusively with XD drivers, this high-end cassette features a 500–520% gear range that excels on both brutal climbs and fast-flowing descents.
CNC-machined from a single block of hardened steel, the X-Dome construction delivers SRAM’s best strength-to-weight ratio and exceptional durability. A Ti Nitride finish not only looks sharp but also sheds mud and keeps shifts clean and quiet in all conditions. Whether you're chasing podiums or just love top-tier performance, this cassette is the gold standard.
Details
- Lightest and highest-performing Eagle cassette in SRAM's lineup
- X-Dome architecture provides a strong yet lightweight structure
- Ti Nitride finish reduces friction and resists corrosion
- Available in 10–50t and 10–52t configurations for up to 520% gear range
- Designed exclusively for SRAM Eagle drivetrains and XD freehubs
- Precision-machined for smooth, quiet, and reliable shifting
- CNC-machined steel cluster with aluminum 50/52t cog for optimized performance
- Item #SRM009X
- Cog Sizes
- 10 - 50t, 10 - 52t
- Cog Material
- [cog cluster] CNC-machined cromoly, [50/52t cog] aluminum
- Freehub Type
- XD
- Claimed Weight
- 12.4oz (352g)
- Manufacturer Warranty
- 2 years
Reviews
Q&A
What do you think about this product?
Overall Rating
4 based on 5 ratings
Review Summary
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.Customer Images
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Selecting an option will reload the available reviews on the pageMarch 21, 2025
SRAM XX1. Cassette
This is the replacement Cassette and the shipping was very fast despite it was a replacement order this company maintained a great customer service and will order more parts in future. Now my SB165 almost done. Thanks again
March 9, 2024
A worthy upgrade
- Familiarity:
- I've put it through the wringer
I had installed the XX1 cassette previously on my 2021 bike (road/gravel) and was very pleased with it. I went ahead and installed another XX1 cassette on my 2023 road bike. A significant reduction in total cassette weight. Combined with the XX1 chain on both bikes, the shifting with a conventional SRAM derailleur set-up is smooth and without issues. I can recommend the XX1 Cassette without any reservations.
Originally reviewed on Competitivecyclist.com
December 28, 2023
Huge improvement
- Familiarity:
- 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.
November 18, 2022
The SRAM Factory In China Is Not Back
- Familiarity:
- I returned this product before using it
- Height:
- 6' 4"
- Weight:
- 200
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.
September 20, 2020
52T, 52 Weeks?
- Familiarity:
- 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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