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Dura-Ace CS-R9100 11-Speed Cassette

5 out of 5 stars
2 Reviews
Current price: $184.59 - $234.39 Original price: $292.99
Up to 35% off

Style & Size:


Why We Like The Shimano Dura-Ace CS-R9100 11-Speed Cassette

Shimano's groupsets often often miss call-outs for European elegance or relentless pursuit of weight loss at all cost and innovation for innovation's sake, instead earning their loyal following through the incredible dependability and meticulous engineering of the Dura-Ace CS-R9100 11-Speed Cassette. 9100 isn't a typo there, it is, in fact, a newly reworked version of Dura-Ace. When the brand introduces a new groupset, you can be sure it's actually boasting improvements you don't have to be Porte or Stannard to detect on a routine Sunday in the saddle.

Since Dura-Ace is the top-tier drivetrain in the Shimano road lineup, you might be surprised that only the largest five cogs are titanium. That's because—though it's lighter—titanium is generally more prone to wear than nickel-plated steel, and the smaller cogs are more prone to wear than the larger. Because of these material properties, Shimano only uses titanium where the softer metal doesn't create a significant negative impact.


  • Ride with more intuitive gearing on this improved cassette from Shimano
  • Precisely machined cogs balance weight and durability
  • Carbon and alloy carrier blends low weight and strength
  • 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

Overall Rating

5 based on 2 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 0 reviews
4 Stars - 0 reviews
5 Stars - 2 reviews

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.
Runs smallTrue to sizeRuns large

What do you think about this product?


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5 out of 5 stars

October 9, 2021

The 12-28 has the 16-tooth sprocket!

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.

Ken S

Originally reviewed on

5 out of 5 stars

May 17, 2021

Works as expected

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