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The Shimano-Dura-Ace CS-R9100 Eleven-Speed Cassette starts with the famously fast and easy ramps and cutouts that help keep Shimano shifting humming smoothly. Then they developed a new tooth profile system for even faster and smoother shifting. Then they upgraded the rest for an impressive package that is super-light performs great and looks good. First they lightened the set. Thats thanks to the five tallest cogs getting installed on two multi-material carriers. They combine aluminum with carbon-fiber. Those cogs the two tallest and then the next three are constructed out of titanium for light weight. The next six are loose and made of steel for durability. Theyve also developed some new gear combinations. Two of them start with a twelve-tooth cog. Theres both a 12-25 and 12-28 in the 9100 family. Plenty of people dont need that 11-tooth because theyre neither sprinting in the WorldTour nor trying to reach maximum velocity heading down mountains. A third is the widest Dura-Ace offering yet. Thats the 11-30 ratio. and yes the new 9100 rear derailleur accommodates the 30. Those are in addition to the standard 11-25 and 11-28 offerings. Weights are 175g for 11-25 193g for 11-28 211g for 11-30 189g for 12-25 and 205g 12-28. For all the awesomeness you have here you can use Shimanos CN-HG901-11 chain for perfect system integration. However any eleven-speed chain will do the job. Likewise they designed the CS-9100 to work best with the RD-R9100 rear derailleur though any eleven-speed rear derailleur will do. The Shimano Dura-Ace CS-R9100 Cassette shows how light wide and fast shifting can be.
- Ride with more intuitive gearing on this improved cassette
- Precisely machined cogs balance weight and durability
- Carbon and alloy carrier blends low weight and strength