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  • Shimano Ultegra CS-R8000 Cassette
  • Shimano Ultegra CS-R8000 Cassette Detail
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ShimanoUltegra CS-R8000 Cassette
Sale 36% Off$54.99 - $64.99

Item # SHI00FZ

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  • Gray, 11x25 ($61.99)
  • Gray, 11x28 ($54.99)
  • Gray, 11x30 ($64.99)
  • Gray, 11x32 ($57.99)
  • Gray, 12x25 ($63.99)
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Item # SHI00FZ

Just a cog in the wheel.

Shimano's Ultegra group is one of the most popular out there with good reason: it's the perennial favorite when you factor the performance-to-dollars equation. With different demands for drivetrain ranges required for road, gravel, and CX riding, Shimano has created cassette ranges designed to allow the R8000 drivetrain to easily satisfy the needs for a variety of riders. The Ultegra CS-R8000 Cassette ranges as high as 32t, so you can set up the new Ultegra (or Dura-Ace R9100) with the range you need for gravel epics, 4 corner crits, hill climbs, junior nationals, and everything in-between.

Shimano's experience in forging, machining, and engineering allows for an enormous amount of technology that goes into tooth design, shaping, and shifting ramps. The cogs themselves are constructed from a nickel-plated steel that prevents corrosion and is slow to wear. Ultimately this leads to cassettes that shift smoother and more precisely—and last longer—at a price that's friendly to the self-sponsored racer.

The top five cogs are grouped as three and two, respectively, and are riveted to anodized aluminum spiders that add stiffness to improve shifting. The remaining six cogs are individual with spacers between, and an anodized aluminum lockring screws into the freehub to hold the entire assembly together. One spline of the cassette is wider than the others and corresponds with the splines on the freehub, so the cassette cogs can only be installed with the right clocking of the shifting ramps, timing them for perfect chain pick-up and release. This innovation is true to Shimano's Japanese culture, which uses the term "poka-yoke" to refer to features—like these guiding splines—that serve as built-in wards against user error.

Shimano Ultegra cassettes shift so well and are so unnoticeable that even World Tour teams will often sub Ultegra cassettes to get the bikes to the minimum weight limit. Frames and wheels are just so light these days, and adding mass to the cassettes isn't too detrimental to performance, and the Ultegra units shift on par with Dura Ace while actually lasting much longer.

Please note that the new Ultegra RD-R8000 Shadow Rear Derailleur comes in two sizes, short and long cage. Cassettes up to 11-30t are compatible with the short version, while 30t cogs and up require the longer model.

  • Long-lasting racing cogs for the self-sponsored cyclist
  • Reliable, durable steel preforms like Dura-Ace plus a few grams
  • Precisely machined ramps allow for accurate 11-speed shifting
  • Ranges available for crits to climbs to gravel grinds
  • Shimano's Ultegra R8000 drivetrain leads the way for best value in the industry
Tech SpecsWeight
Tech Specs
Cog Sizes
11 x 25t, 11 x 28t, 11 x 30t, 11 x 32t, 12 x 25t, 14 x 28t
Cog Material
nickle-plated steel
Carrier Material
Recommended Use
Manufacturer Warranty
2 years

Actual Weight

Actual weights are measured in-house by the Competitive Cyclist team.

Have questions? Chat with a Gearhead



Gray, 11x25
Gray, 11x28
Gray, 11x30
Gray, 11x32
Gray, 12x25

Claimed Weight

Claimed weights are provided by the vendor.

Have questions? Chat with a Gearhead

[11x25] 232g, [11x28] 251g, [11x30] 269g, [12x25] 243g, [14x28] 300g

Reviews & Community


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Avg. ride time: 6h 5m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Ultergra FTW

  • Familiarity: I've put it through the wringer

Super durable, fairly lightweight, and a bunch of ratios. This cassette always gets the nod when I'm in need.

Ultegra never disappoints

    Smooth cassette at a nice weight. It's nice it comes in a 11-30. Nice bang for the buck too!

    Avg. ride time: 1h 48m per week
    • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

    smooth as butter

    • Familiarity: I've put it through the wringer

    Smooth precise shifting. Purchased 11-25 to replace 11-21 for middle-gear range benefits. Ultegra - highest quality cassette with probably a little more durability than Dura Ace. (Obviously, a little heavier)

    Avg. ride time: 3h 46m per week
    • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

    I have a 6800 11-28 cassette on my wheel. Can I use this 8000 11-28 cassette on a spare wheel for my trainer and not have to fuss with adjusting the derailleur?

    With same question in mind, I bought r8000, actually couldn't find original cs6800 at least 1 year ago.

    Have no problem with original cs6800 outdoor, but some noise especially in one of mid gear (maybe fifth) while Zwift.

    Nowadays find a cs6800 casette and try to be sure, if it is real problem or anything else

    Shimano cassette

    • Familiarity: I've used it several times

    This cassette is very light and works great with my r8000 derailleur. I'm running a 11-28 cassette with a 50/34 crank.

    Light, Durable and Quiet

    • Familiarity: I've put it through the wringer

    Perfect cassette for the money. Running 11-28 with SRAM Etap and DuraAce Chain. Crisp, precise shifting and seems to run a tad quieter than its 6800 counterpart.

    Weight Savings!

    • Familiarity: I've put it through the wringer

    I upgraded my 105 5800 to the new Ultegra R8000, and purchased the 11-28 cassette to match my new short cage derailleur. Coming from an 11-32 105 cassette, this upgrade to Ultegra earned me a 60 gram savings! Ultegra 11-28 cassette weighed 246 grams on my PT scale.

    A follow up question. Can a 11 30 cassette be used with a short cage 6800 Di2

    No. 11-28 is the max range for the short cage

    i currently run an 11-30 on my Di2.

    the cross chain can cause issue but i haven't had issue whine's paying attend to its been fine for over a year...... that being said its not recommended

    For those with the newer ultegra R8000-SS rear mech in now fits up to 11-30t.

    Shimano says no.

    But I have been running one for a year now

    with 36-52 up front.

    Maybe 39-53 might b diff. Never tried that combo.

    I need to replace my 11-28 6800 cassette and chain. Is the R8000 compatible

    Absolutely. R8000 cassette and chain are compatible with the older Ultegra 6800 groupset. Please let me know if you have any further questions. or direct line 801-619-7476

    Unanswered Question

    Will the 11-28 work with DA 9000?

    Finally... a 32!

    • Familiarity: I've used it several times

    I gave this cassette as a gift to a family member who was really looking for a little bit more to help climb the canyons around us. Installing is the same as all Shimano cassettes, and the shifting is smooth and crisp! She is extremely happy knowing that she can run the R8000 cassette with her existing 6800, and is now able to go climb the roads just in time for fall.
    If you have any questions on the new R8000 gear, please reach out to me.