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SRAM XG-1295 X01 Eagle 12-Speed Cassette

Item # SRM009W

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  • Black, 10-50t ($367.00)
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Item # SRM009W


Gift of the gods.

The launch of SRAM's 12-speed one-by Eagle X01 and XX1 drivetrains marks an evolutionary step in the company's determined march towards rendering the front derailleur a meaningless relic of the past. While the entire group merits close attention, the breakout star is unquestionably the 12-cog cassette. The SRAM XG-1295 X01 Eagle 12-Speed Cassette may not feature the bright, golden, Ti-Nitride-coated bling of its more expensive XX1 counterpart, but it boasts all the engineering ingenuity that brings 12-speeds roaring into the scene at a price that won't take quite as massive a bite out of your wallet. The XG-1295 boasts a 500% usable gear range. That eclipses the usual one-by gearing (11-speed, 10-42t cassettes with a 420% range) and rivals the average of 515% found in most doubles.

The Eagle 12-Speed Cassette encompasses that popular 10-42t 11-speed cassette and adds a 50t bailout gear for those lung-bursting climbs that leave you gasping for air and pleading for the cycling deities to materialize amidst the switchbacks with an extra climbing gear. In short, Eagle gives you a one-by system with all the gear range you need to master leg-crushing ascents and heart-dropping descents without the finicky weight of a front derailleur or extra chainring.

SRAM incorporates its X-Dome architecture, whose high strength-to-weight ratio keeps things as efficient as possible while its open design shoos away mud for confident, consistent shifts in variable conditions. This makes the Eagle 12-Speed Cassette an ideal choice for racers bent on shaving grams without sacrificing durability, along with claims of an even smoother, quieter shifting experience than ever before.

As much as SRAM is reinventing the proverbial wheel with a 12-speed cassette, the company is sensitive to the potential uproar that would greet yet another new hub standard. The Eagle 12-Speed Cassette is compatible with SRAM's current XD Driver body, making for an easy transition from 11 to 12 speeds. That said, upgrading to Eagle does require a full drivetrain swap, meaning you'll need an Eagle chain, crankset, chainring, shifter, and rear derailleur to make use of that 12-speed awesomeness.

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

Tech Specs

Cog Sizes:
10 - 50 t
Cog Material:
[10-42t cluster] chromoly, [50t cog] aluminum
Hub Type:
Claimed Weight:
355 g
Recommended Use:
mountain bike
Manufacturer Warranty:
2 years

Reviews & Community


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Go Big or Go Home!

  • Familiarity: I've used it several times

First of all this thing is a piece of art. When I first got it I wasn't sure whether to put it on my bike or hang it on my wall. It becomes equally marveling when it comes time to push up that those vertical climbs necessary to get to the epic downhills. Maybe it's just the way that the gearing works out on my bike (32T chainring) or local trails but I found myself running a more consistent gear the whole way up. Also the peace of mind of having that huge granny gear makes it comforting to know you have something to fall back on when you feel like you've got nothing left to give.

Very nice

    Very nice craftsmanship in this cassette. All the machining and finish makes for a nice setup. Either have your LBS setup, or take great care in setting this up yourself. So far riding has allowed me to up the front chainring in size, allowing for faster downhill descents. Aside from the high price point, there’s not much to complain about with the X01 setup.

    High Quality, great options

    • Familiarity: I've used it several times

    With my 1x11 and smaller front chainring I noticed I would run out of gearing for downhill speed. The 1x12 allowed for a larger chainring up front, bringing up downhill speeds, and still allowing me the granny gears needed to get up the hill without being too fatigued to enjoy my rides.

    The quality of the cassette looks to be great as well, time will tell on overall durability, but if it's like their other cassettes, I'm sure I wont be disappointed.

    Getcha Eagle on!

    • Familiarity: I've put it through the wringer

    Wasn't sure about how necessary a 50t cog was when this first was released but after riding it a bunch, I definitely love it. Gives a nice range to allow for running a larger ring up front for that high-end speed when descending. And superrrr light.


      SRAM has got it figured out. This thing is dialed! The entire Eagle system is a huge game changer. I can't wait to get out on my bike more.

      If you have any questions about the SRAM Eagle Group or any other gear shoot me an email at or give me a call at 801-523-4053

      Go Big!

      • Familiarity: I've used it several times

      This cassett is awesome. Its gearing allows for great climbing and even better descents.

      Avg. ride time: 24m per week
      • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.


      • Familiarity: I've put it through the wringer

      This cassette offers smooth shifting over a HUGE spread of gears. It's got a bit more weight to it than the 11spd XX1 cassette I used to run, but the additional range is more than welcomed for a bit more weight. The Black coating seems plenty durable, even when I hardly ever lube the chain.

      More range!

      • Familiarity: I've put it through the wringer

      Unreal amount of gear range with this cassette. The biggest perk I have found is I can run a chain ring with 2-4 more teeth up front, still have a great climbing gear, and have better range for descending. Yes, it is a bit pricey, but the benefits to me are worth it.

      Unreal range

      • Familiarity: I've put it through the wringer

      500% range from a 1x drivetrain. I didn't think it would work, but SRAM made it work, and work really well. I have put about 350 miles on mine so far, and it has been flawless. Shifts better than the outgoing 1x11 stuff and yet you have better range than before.

      BIG Cassette = BIG Range

      • Familiarity: I've used it several times

      Having a cassette that is larger than your rear brake rotor looks a little odd at first; but, once you ride eagle, you'll never want to go back. SRAM Eagle has completely eliminated the need to run a front derailleur on any mountain bike, which means reduced weight, cleaner handlebar setup, and less maintenance. The weight savings of the XX1 cassette over this X01 model are minimal in my opinion, so I decided to save the additional $60 and go with X01.

      Avg. ride time: 1h 6m per week
      • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

      You can climb a vertical wall with this*

      • Familiarity: I've put it through the wringer

      I'm riding a Yeti SB5.5 and am running a 34t chainring with this 10-50t 12speed cassette.

      The second biggest cog of this is a 42t and is what the biggest cog of the 11sp Sram cassettes. I took this as an ability to size up my front chainring to a 34t and may even bump to a 36t if it fits and if I am fit enough later in the summer.

      The biggest downside to the X01 cassette over the XX1 is that its not the blinged out gold, but the 50t dinner plate bail out cog is still a dead give away!

      If you have any questions on the cassette or what chainring to pair it with for you and your bike, give a shout to my direct line 801.204.4547 or email me at and I'd be happy to help!

      *depending on your riding skills and ability to fight gravity.

      You can climb a vertical wall with this*

      Dinner Plate!

        Makes every climb doable even if walking would be faster. Have eagle on my hardtail and fs bike. Great performance on both.

        Avg. ride time: 13m per week
        • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

        All the Gearz!

        • Familiarity: I've used it several times

        I have been using the SRAM Eagle X01 drivetrain on my new rig and I'm pretty enamored with it. The cassette is especially noticeable due to the HUGE 50 tooth ring at the biggest cog size. It really is a cheat code when getting to that gear range with a 30 tooth crank ring. The shifting has been crisp for the most part as under some poor pedal stroke weighting has caused some catching at times, but it is more pilot error than anything. Along with the cheating feeling of the 50 tooth ring, I'm finding it hard to pedal out of the highest gears as well at 10 teeth. If you have the means to, get on the Eagle drivetrain as soon as you can!


        • Familiarity: I've used it several times

        I went from a 32 in the front on my 1x11 to a 36 in the front with eagle and the math says I still got an easier granny gear. Nuts!


        • 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.

        Huge range

        • Familiarity: I've used it several times

        Happy with the range on this. Ive got this paired to a 32t ring up front which seems like it'll cover most everything I ride.

        the most range

        • Familiarity: I've used it several times

        What can I say that hasn't been said in other reviews? The range is the best available, the construction is top-notch and the shifting is super smooth. Do yourself a favor and add Eagle Power to your bike!

        Eleven Speed Is So Last Year

        • Familiarity: I've put it through the wringer

        SCRUBS references all day long!

        Jokes, 1x is the way to go for mountain biking. I cannot tell you when the last time I dropped a chain was (I do not run a guide either) When I was running 1x11 I always ran a 28t chainring. I am not a stellar climber and needed something I could slog up the mountain for 2 hours of straight climbing, and I am not a world cup enduro racer, nor do I care if I spin out of gearing on some fire road descent. There were only a handful of trails, or sections of trails where I could have used a taller gearing so that I would not spin out. Enter the Eagle! I run my eagle drivetrain with a 32t chainring, which gives me slightly easier gearing than my previous 28x42 setup, but I have yet to find a section of single track where I could run out of gears. I could not see running a 30t chainring with Eagle unless you are longing for the gear range offered by the old school 3x drivetrains. I love the responsive and consistent shifting that Eagle brings to the table as well. Well done SRAM, looks like you are always at least a step ahead.