The Ultegra CS-R8100 12-Speed Cassette utilizes 12 gears for smoother pedaling action up and down the cassette. A functional and budget-friendly 12-speed cassette for cycling road and gravel.

• Durable steel cog material
• Works with hyperglide 11 and 12 speed carriers
• Compatible Chain: Hg 12-speed
• Series: Ultegra
• Generation: Ultegra R8100
• Number Of Speeds: 12
• Cog Sizes: [11-34] 11, 12, 13, 14, 15, 17, 19, 21, 24, 27, 30, 34
• Cassette or Freewheel: Cassette
• Finish: Anodized
• Weight [11-34T]: 348 g