The Shimano Ultegra CS-R8101-12 cassette will give you smooth and precise shifting in all circumstances. It allows you to sprint, climb and ride for long periods of time without slacking off when thinking about your next gear change. The larger sprockets in the drivetrain maximise efficiency and remain compatible with Shimano 11 and 12 speed freewheel bodies.
This cassette features HyperGlide Plus technology, which has revolutionised mountain bike shifting with smooth shifts both up and down the sprocket range. The Ultegra CS-R8100 cassette is the quintessential road cycling shifter.

Highlights

• The combination of 12 well-spaced gears offers maximum efficiency and acceleration performance for every racing situation
• Smoother and faster gear changes under maximum pedalling force
• Compatible with the new 12-speed and 11-speed road freewheel body

Features

• Number of gears: 12
• Gear teeth: 11-34
• Sprockets: 11-12-13-14-15-17-19-21-24-27-30-34
• Compatible chain: HG 12 speed
• technology: HyperGlide Plus
• Weight: 345 g