Dura-Ace CS-R9100 11-Speed Cassette
Style & Size:
Quantity
Dura-Ace CS-R9100 Cassette delivers pro-level precision with optimal weight and durability
What Our Gearhead® Experts Are Saying:
“This cassette has that perfect Shimano feel—crisp, quiet shifts every time. I love how it balances lightweight titanium cogs with steel where it matters most, giving me both performance and longevity without compromise.”
When we’re chasing smooth, flawless shifts and a drivetrain that feels tuned to perfection, the Shimano Dura-Ace CS-R9100 Cassette is the standard we trust. As Shimano’s top-tier 11-speed road cassette, it combines precision engineering, lightweight construction, and legendary reliability for the kind of performance that stands out on every climb, sprint, and descent.
Its carbon and alloy carrier minimizes flex under power, while titanium and nickel-plated steel cogs deliver the ideal mix of low weight and long-term durability. Every shift clicks into place with that unmistakable Shimano consistency—refined, responsive, and whisper-smooth. Whether we’re racing, training, or just pushing for another personal best, the CS-R9100 brings elite-level performance to every ride.
Details
- Top-tier 11-speed cassette for smooth, precise shifting performance
- Titanium large cogs cut weight without sacrificing stiffness
- Nickel-plated steel small cogs resist wear for extended life
- Carbon and alloy carrier blends strength and lightness
- Engineered for Shimano 11-speed road drivetrains
- Balances pro-level performance with long-lasting reliability
- Item #SHI00DQ
- Cog Sizes
- 11 - 25t, 11 - 28t, 11 - 30t, 12 - 25t, 12 - 28t
- Cog Material
- [five largest cogs] titanium, [six smallest cogs] nickel-plated Cro-Moly
- Freehub Type
- Shimano 11-Speed Road
- Carrier Material
- carbon fiber, alloy
- Claimed Weight
- [11-25t] 6.2oz (175g), [11-30t] 7.4oz (211g)
- Manufacturer Warranty
- 3 years
- Activity
- cycling
Reviews
Q&A
Overall Rating
5 based on 7 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.View
Selecting an option will reload the available reviews on the pageDecember 2, 2025
Great upgrade for my road bike
- Familiarity:
- I've put it through the wringer
No fuss installation on new wheelset to replace original wheels with 105 cassette. Seamless compatibility with rest of 105 components. At least 1 to 2 mph faster!
Originally reviewed on Backcountry.com
September 12, 2025
Right part in just 2 days
Half the battle in ordering parts on-line is making sure the on-line vendor gets the part number right. That is especially true of Shimano parts. Competitive Cyclist did & got me my new 11 speed cassette in two days.
Originally reviewed on Competitivecyclist.com
June 4, 2025
Nice cassette
- Familiarity:
- I've used it several times
I bought this a month ago and had it installed by my bike mechanic. Makes for smooth shifting as can be expected with a Dura-Ace product, superior quality. Got it at a great price too.
Originally reviewed on Competitivecyclist.com
March 13, 2025
Another top shelf piece of Shimano gear!
- Familiarity:
- I've used it several times
I'd venture to say that the primary reason for spending the extra $$$ for this Dura-Ace cassette would be for the weight savings (my scale shows 175g for the 11-25t, not including the lock ring). The shift quality feels the same as the Ultegra cassette that it replaced. There is concern that the titanium cogs (used for the five largest cogs, only) may wear faster than their steel counterparts. I'm running this cassette with a waxed chain, so I'm hoping that this will extend the service life of the cassette. Only time will tell...
Originally reviewed on Competitivecyclist.com
August 7, 2024
State of the art
- Familiarity:
- I've put it through the wringer
What can I say about the most advanced cassette in the world. Pricey, yes but beautifully designed and executed. Lightweight avenue to precise shifts.
Originally reviewed on Competitivecyclist.com
October 9, 2021
The 12-28 has the 16-tooth sprocket!
- Familiarity:
- I've put it through the wringer
I upgraded from the usual 11-28 Ultegra to the 12-28 DA for the 16-tooth sprocket. So nice to have a 15-16-17 midrange cadence transition, and I used the 11 rarely. Expensive, but worth it. The titanium big gears seem to be wearing well. No issues.
Originally reviewed on Competitivecyclist.com
May 17, 2021
Works as expected
- Familiarity:
- I've put it through the wringer
Installation goes off without a hitch, have no problems. My last cassette lasted over 10k miles with UFO lube and proper care otherwise. No problems whatsoever.
Originally reviewed on Competitivecyclist.com
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