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  • SRAM - XG-1299 XX1 Eagle 12-Speed Cassette - Gold
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  • SRAM - XG-1299 XX1 Eagle 12-Speed Cassette - Gold

SRAM XG-1299 XX1 Eagle 12-Speed Cassette


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    • Gold, 10-50t

    13 Reviews


    The future is now.

    Welcome SRAM’s new XG-1299 XX1 Eagle 12-Speed Cassette, the culprit that has officially thrown the mountain bike front derailleur into the dustbin of history. SRAM’s new cassette redefines the one-by drivetrain with a 12-speed, 10-50t cassette that vaunts a 500% usable gear range, rivaling most doubles without (of course) the considerable weight gain of an extra ring and front derailleur. So whether you’re pounding out a grueling climb or cranking at top speed, this cassette has the range to cover you. 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 swag.

    SRAM designed the XX1 Eagle to work with its proven XD Driver body, so there’s no need to fret the coming of a new hub standard. It was also created to work exclusively with SRAM Eagle drivetrain components–but don’t worry, your bike (and legs) will thank you for making the jump.

    • A 12-speed cassette that redefines 1x drivetrain functionality
    • 500% usable gear range is similar to double drivetrain ranges
    • X-Dome architecture yields incredible strength-to-weight ratio
    • Smoother, quieter shifting characteristics
    • Compatible with SRAM's 11-speed XD Driver body
    • Precision engineered for exceptional longevity
    • Works exclusively with SRAM Eagle drivetrain components
    • Item #SRM009X

    Tech Specs

    Cog Sizes
    10 - 50 t
    Cog Material
    [cog cluster] CNC-machined cromoly, [50t cog] aluminum
    Hub Type
    XD Driver body
    Claimed Weight
    352 g
    Recommended Use
    cross country
    Manufacturer Warranty
    2 years

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    High Rolling

    • Familiarity: I've put it through the wringer

    If you’re looking you probably know...
    And you have to do it at least once in your life... be the high roller
    Let’s see the upside, in no particular order... first there is the aesthetic appeal. It looks amazing. Like truly amazing. Who would guess gold went with everything? Sram! Ha
    Get the gold chain though. It just ties it together.
    Then of course there is the performance side. Setting up a smooth XX1 drivetrain brings so much pleasure and satisfaction. Sets up so easily and quickly and I find is easy to service regularly and can last for an extremely long time.

    Dont be a poor

    • Familiarity: I've put it through the wringer

    Look, all I am saying is that this GOLD cassette is pretty much the hottest thing you are going to put on your bike. The Titanium nitride finish is legit and has been around for quite some time. I know it from the professional motocross scene where all of the top factory racers had Ti Nitride coated forks for reduced stiction and better performance. Pretty sure those forks they were running cost more than my car. Basically it is like a crazy nice low friction treatment so not only will it look super cool but it will help your drivetrain run quieter and longer than the non treated cassette.

    I Love GOOOOOLD!

    • Familiarity: I've put it through the wringer

    Lightweight cassette with incredible range. 10-50 tooth that will work with any of the Sram Eagle drivetrain components. The gold really stands out and it saves you a bit less than half a pound compared to the GX Eagle cassette.


    • Familiarity: I've put it through the wringer

    I have been loving the new SRAM X01 Eagle drivetrain. It has performed with minimal maintenance—not recommended—and helped pursue my passion to ride diverse terrain with one bike. With any new technology in the bike world, there is a cost to getting on the newest and greatest advancements—the Eagle is fresh to the market and currently the only 1x12 drivetrain available—and the price tag reflects the exclusivity. Per usual, prices do tend to drop after time (although there is no concrete evidence of that happening anytime soon). However, even as is, I think the price tag associated with the new 1x12 systems is well worth the money and will only increase any on-trail experience and offer a whole new range to you daily ride.. While the whole group sees engineering taken to new levels of ingenuity, the shining star of Eagle is undoubtedly the SRAM XG-1299 XX1 Eagle 12-Speed Cassette. Resplendent in its gold-plated allure and boasting a massive inner cog that mirrors the size of a compact road crankset's big chainring, this cassette boasts 12 cogs and a 500% usable gear range. This eclipses the popular 10-42t, 420% one-by 11-speed range and rivals the average of 515% found in most doubles. The Eagle 12-Speed Cassette encompasses that 10-42t cassette so commonly employed with 11-speed one-by drivetrains and adds a 50t bailout cog for those lung-crushing climbs that leave you breathlessly pleading for the cycling deities to fly out of the sky with an extra climbing gear. In short, Eagle gives you a one-by system with all the gear range you need to conquer leg-searing ascents and heart-dropping descents alike, without the finicky weight of a front derailleur or extra chainring. That glittering gold bling isn't there solely for looks, although we'll readily admit that it'd be worth the investment just to have that golden flash rolling with us off the line. The glitzy aesthetics come courtesy of a Ti Nitride finish that increases durability and reduces friction compared to non-coated cassettes. Ti Nitride does for cassettes what anti-friction coatings have done for suspension forks--makes everything run smoother, quieter, and more reliably over time, so you can focus on the ride without worrying about your drivetrain. SRAM incorporates its X-Dome architecture, which it perfected with its one-by 11-speed cassettes and yields an open design with an incredibly high strength-to-weight ratio that shoos away mud for confident, consistent shifts in variable conditions.

    Keep it 5-Hundo

      This cassette is just what you'd expect from the XX1 designation from Sram, smooth and nearly flawless. Plus it's GOLD! The 500% gear range is perfect for running 1 or 2 chainring sizes bigger than regular 1x11 drivetrains. It took maybe 5-10 minutes of tweaking to dial in the limiter screw and derailleur adjustments, but now I'm shifting 12 gears like a dream! The whole system works very well and I'm very happy with my upgrade. I've used XX1, X01, and XT 11 speed drivetrains. This blows all of them out of the water.

      Gold is pretty sweet

      • Familiarity: I've put it through the wringer

      When color matters go with the xx1 cassette. It is the exact same weight as an xo1 cassette. The only difference it the ti-nitride coating. It will keep your drivetrain quieter and last a bit longer over an xo1 cassette.

      The best of the best

      • Familiarity: I've put it through the wringer

      I've been riding XX1 eagle for about 1 season now and I have to say it is the best of the best. The dinner plate 50T cog in the back allows you to up your chainring by a couple teeth which makes the gearing that much better on the lower end of the cassette. Some people have had some issues with getting the derailluer dialed in to make the jump from the 42T cog to the 50T but after I played with the b-screw on the derailluer for about 5 minutes, it was running quite smooth. Performance is identical to XX1 1x11 but now you can have blinged out gold in 1x12.

      What you love from XX1 +1 more gear

        I was a little hesitant about why I would need that extra gear range, or what it would do to the shifting mechanics, but after riding this through most of the summer i can say that I ended up using the 50T a lot more than i expected and Eagle feels just like 11sp XX1 with one extra gear. Depending on your terrain, you can increase your chainring size from what you might run to put that extra gear range at the top end rather than low end, but out here in Utah i left a 32t up from and ended up using the 32-50t on really steep grades or after 4-5 hours in the saddle when the legs arent nearly as spry. Set up was a little bit trickier as the tolerances are naturally tighter, but wasnt too bad. Once set up I had no real issues. Eagle delivers the crisp 1:1 sram shifting that you'd expect.

        What you love from XX1 +1 more gear

        Not as I expected

        • Familiarity: I've used it several times

        The perfomance isn't as I expected, the drivetrain is not that precise in the higher plate (50t)

        World Champ

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

        Riders from the Sram pro teams have been testing the Eagle drivetrain in a variety of conditions. A lot of blood, sweat, and gears have gone into its development and what has come out is nothing short of impressive. The engineering of each piece of the drive train has allowed riders to benefit in a number of ways and it is no surprise to see the signature gold Ti-nitride gracing podiums from the US to Nove Mesto.
        If the pros can use a bail out gear, so can the rest of us. The Eagle 12-speed cassette allows for a massive range and can be paired with a variety of different Eagle Chain rings to optimized gear ratios based on your chosen terrain. Shifting is as silky smooth and exact as ever and the new Eagle chain is manufactured through an exhaustive 37-step process to ensure precision. When you put this group on your bike, be ready to blow the doors off your competition, even if its just yourself.
        Feel free to contact me directly for your next build or to upgrade your existing drivetrain.
        My Schedule is as follows:
        Mon-Thurs: 7am-530pm
        I can be reached at, on Chat as Sean Z, or by phone at 801-736-6396 x 4739

        World Champ

        Can I use my Sram XX1 cranks with the rest of parts of XX1 eagle groupset?