Shimano Ultegra CS-R8101 12-speed cassette

The Shimano Ultegra CS-R8101 12-speed cassette is designed for road cyclists using a Shimano 12-speed drivetrain. Choose between two gear ranges: 11-30T for smoother shifts or 11-34T for easier climbing.

• Smooth shifting across 12 speeds thanks to HYPERGLIDE+ technology
• Nickel-plated steel sprockets, a durable material for everyday use
• The lockring is included in the package and ready to install
• Fits Shimano HG Spline L2 12-speed freehub bodies
• Choose 11-30T for closer gear ratios or 11-34T for tougher climbs

Technical specifications

• Model: CS-R8101-12 (Ultegra)
• Speeds: 12
• Available tooth counts: 11-30T, 11-34T
• 11-30T tooth range: 11-12-13-14-15-16-17-19-21-24-27-30T (12 sprockets)
• 11-34T tooth range: 11-12-13-14-15-17-19-21-24-27-30-34T (12 sprockets)
• Material: nickel-plated steel
• Freehub compatibility: SHIMANO HG Spline L2 (Road 12-speed); SHIMANO HG L (Road 11-speed and others)
• Recommended chain: SHIMANO 12-speed HG+
• Standard: 12-speed, HG mounting, HYPERGLIDE+
• Package contents: 1 CS-R8101 12-speed cassette; 1 lockring