Shimano Ultegra CS-R8101 12-speed Cassette 11-34T Aluminium

Product Description

Product features

• Shimano Ultegra CS-R8101 cassette compatible with 11- and 12‑speed systems with an 11-34T range for a wide selection of gears.
• HYPERGLIDE+ technology for smooth and reliable shifts both up- and down‑the‑gears.
• Designed for optimized drivetrain efficiency thanks to wider sprockets and an architecture engineered for performance.
• Lightweight aluminium construction to reduce weight without compromising strength.
• Intended for versatile use (road, cyclo-cross, all‑mountain MTB, touring) with a standard rear position.

Performance and compatibility

The Ultegra CS-R8101 12‑speed cassette (11-34T) delivers precise, fast gear changes thanks to HYPERGLIDE+ technology, ensuring seamless sprocket transitions even under high load. It is compatible with SHIMANO 11‑ and 12‑speed freehub bodies, allowing straightforward integration on suitable wheels.

Design and materials

Primarily made from aluminium, this cassette combines lightness and durability to meet the demands of rigorous disciplines such as cyclo‑cross and all‑mountain MTB. The grey finish contributes to a discreet, professional look.

Versatility of use

With an 11-34T range, this cassette offers comfortable pedalling across varied terrain: closer ratios for sprints and wider ratios for climbs or loaded tours. Ideal for cross, duathlon, triathlon and mixed-terrain rides.

Training efficiency

The optimized sprockets provide improved power transfer from the rider to the rear wheel, limiting losses and enhancing drivetrain responsiveness, especially on climbs or during intense accelerations.