Shimano Ultegra CS-R8101 12-Speed Cassette

The Shimano Ultegra CS-R8101 12-speed cassette is designed for road riders with a Shimano 12-speed drivetrain. Choose between two ratios, 11-30T for a smoother cadence 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
• Lockring included in the package, ready to fit
• Fits a Shimano HG Spline L2 12-speed freehub body
• Choose 11-30T for closer ratios, 11-34T for more demanding climbs

Technical specifications

• Model: CS-R8101-12 (Ultegra)
• Speed: 12
• Available tooth ranges: 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

Founded in 1921 in Sakai, Japan, by Shozaburo Shimano, Shimano is still based in the same city today. For cyclists, it makes drivetrains, brakes, wheels, pedals and cycling shoes. Its history in bicycle components began with the production of freewheels in 1922.