Shimano cassette Ultegra 12 speed 11-34 T cogs road CS-R8101

Shimano Ultegra CS-R8101-12 12-Speed Cassette

The Shimano Ultegra CS-R8101 Cassette is part of Shimano’s Ultegra 12-speed road groupset, designed to improve drivetrain efficiency, power transfer, and shifting performance. The refined tooth profiles and Hyperglide+ technology ensure smooth and fast shifting across all riding conditions, from sprinting to steep climbs.

Key Features

• 12-speed Shimano Ultegra road cassette
• Hyperglide+ technology for faster, smoother shifting
• Optimized tooth profiles for improved power transfer and acceleration
• Stable shifting performance even under high load (climbing and sprinting)
• Steel construction with nickel-plated finish
• Compatible with Shimano 12-speed HG+ chains

Technical Specifications

Gear Range (11–34T)

11 – 12 – 13 – 14 – 15 – 17 – 19 – 21 – 24 – 27 – 30 – 34

Box Contents

• 1× Shimano Ultegra CS-R8101 12-speed cassette
• 1× lockring

In practice

This cassette is designed for modern 12-speed road drivetrains, where Hyperglide+ technology provides a major advantage: it allows smoother and faster shifting under load, improving performance both in sprints and on steep climbs.