Shimano Ultegra CS-R8101 - Cassette 12-Speed Hyperglide+

Take your drivetrain to the next level with the Shimano Ultegra CS-R8101 cassette from the R8100 series. Designed with a performance-first philosophy, it delivers ultra-smooth shifting, exceptional efficiency, and full control - whether you’re racing, chasing a personal best, or enjoying a long ride on the Costa Blanca.

Key Benefits

✔ Hyperglide+ technology
Fast, smooth shifting in both directions - even under heavy load. No interruptions, no loss of rhythm.

✔ Maximum efficiency under pressure
Optimized tooth profiles ensure consistent power transfer, even during intense climbs and sprints.

✔ Seamless shifting experience
Stay focused on the ride - gear changes are fluid, precise, and almost unnoticeable.

✔ Backward compatibility
Works with Shimano 11-speed freehub bodies - no need to upgrade your wheelset.

✔ Proven racing performance
Technology derived from top-tier groupsets like Dura-Ace, now available in Ultegra.

Specifications

• Model: CS-R8101
• Series: Shimano Ultegra R8100
• Speeds: 12-speed
• Technology: Hyperglide+
• Material:
  • Sprockets: Nickel-plated steel
  • Spider: Aluminum
  • Lockring: Anodized aluminum
• Color: Silver
• Gear: 11-34T → 11-12-13-14-15-17-19-21-24-27-30-34
• Weight (manufacturer): approx. 345 g (11-34T)

Compatibility

• Rear derailleurs: RD-R9250, RD-R8150, RD-R7150 (11-34T only)
• Chains: CN-M9100, CN-M8100, CN-M7100, CN-M6100
• Freehub: HG L (Shimano 11/12-speed Road), HG L2 (12-speed Road)

Who is it for?

Perfect for cyclists who demand:

• lightning-fast shifting
• smooth cadence under load
• race-level performance
• reliability on climbs and descents

Why choose Ultegra R8100?

The Ultegra R8100 series was built with one goal: speed without compromise. With Hyperglide+ technology and refined engineering, the CS-R8101 cassette ensures that every gear change is fast, smooth, and efficient—so you can focus 100% on your performance.

Shimano Ultegra CS-R8101 is the perfect choice for riders who want pro-level shifting, durability, and efficiency in every ride.