Shimano Dura-Ace CS-R9100 11-Speed Cassette

The Shimano Dura-Ace CS-R9100 cassette is a 11-speed cassette for road bikes. It is for you if you want a lightweight drivetrain with titanium and steel sprockets.

• Low weight: the 11-25T weighs 175 g thanks to its 7-11 titanium sprockets
• 1-6 steel sprockets, carbon fibre and aluminium-reinforced plastic spider
• Fits the Shimano Road freehub body on 11-speed road bikes
• Works with a 11-speed HG-EV or HG-X11 chain, such as the CN-HG901-11
• Choose between 11-25T, 11-28T, 12-25T and 12-28T: the second number is the largest sprocket

Technical specifications

• Model: Dura-Ace CS-R9100
• Speed: 11
• Available ratios: 11-25T, 11-28T, 12-25T, 12-28T
• Sprocket material: 1-6 steel sprockets, 7-11 titanium sprockets
• Spider material: Carbon fibre and aluminium-reinforced plastic
• Weight: 11-25T 175 g; 12-28T 205 g
• Compatibility: Shimano Road freehub body
• Recommended chain: HG-EV 11-speed or HG-X11 (e.g. CN-HG901-11)
• Intended use: Road bikes
• Pack contents: 1 cassette, 1 aluminium 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.