Dura-Ace CS-R9100 11-Speed Cassette

What Our Gearhead® Experts Are Saying:

“I’ve tested countless cassettes, and nothing matches the CS-R9100’s consistency. The shift ramps are perfectly tuned, and the carbon carrier gives it a light, responsive feel—exactly what you want from a pro-level setup.”

The Shimano Dura-Ace CS-R9100 11-Speed Cassette represents the pinnacle of drivetrain refinement. Every tooth, ramp, and material choice reflects decades of precision engineering aimed at maximizing performance under load.

By pairing titanium for the five largest cogs with nickel-plated steel for the smaller ones, Shimano achieves a rare balance—lightweight responsiveness where it counts, and durability where wear is greatest. The carbon and alloy carrier maintains stiffness for efficient power transfer, ensuring each shift lands with signature Dura-Ace smoothness.

Perfectly compatible with Shimano 11-speed road freehubs, the CS-R9100 delivers crisp, effortless shifting mile after mile. From flat-out sprints to mountain ascents, it’s the gold standard in race-proven reliability and craftsmanship—trusted by pros and perfectionists alike.