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SRAM XG-1295 X01 Eagle 12-Speed Cassette


Item # SRM009W

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  • Black, 10-50t ($360.00)
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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:
Actual Weight:
Black, 10-50t: 358g
Recommended Use:
mountain bike
Manufacturer Warranty:
2 years

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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.

Almost too much range

  • Familiarity: I've put it through the wringer

After riding a 1x set up for the past 3 years I can say without a doubt that I won't run a front derailleur ever again. Sram is the company that brought a reliable 1x drivetrain to market and they haven't stopped updating since. Eagle is the newest rendition and once again Sram has made a great thing better.

The range of this cassette is amazing. Riding here in Utah I almost never need to use the 50T cog out back. However, I've been able to run a larger chainring up front to achieve higher speeds without sacrificing my low range.

If you're looking to go 1x and want the best range on offer I recommend looking at Eagle X01. Below is the gearing for this cassette.

10, 12, 14, 16, 18, 21, 24, 28, 32, 36, 42, 50

do you need a special kind of hub to install twelve speed cassette? I currently have a 10 speed and I'm not sure if I need to buy a new hub.

Hey Jimmy! You'll need a XD Driver freehub to install the 12sp cassette. You'll have a splined freehub body that both Sram & Shimano 10sp cassettes use, feel free to reach out to me at or 801.204.4547 and I can help get you an XD Driver if you're interested in going to a 12sp drivetrain. Cheers, Connor

Re: sram 12-speed cassette--you write FIVE PARAGRAPHS of AD copy but don't even mention the detail everyone wants to know: WHAT ARE THE COG-SIZES. This earns you the chump of the month award

Hey Eric, The sizes are - 10, 12, 14, 16, 18, 21, 24, 28, 32, 36, 42, 50