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105 CS-R7100 12-Speed Cassette

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Why We Like The Shimano 105 CS-R7100 12-Speed Cassette

Built for the 105 Di2 drivetrain, the Shimano 105 CS-R7100 12-Speed Cassette delivers optimal shifting performance and quick acceleration with its refined gear combination. Ranging from 11-34T, this high-performance cassette helps us climb quicker, get up to speed faster, and ride farther than ever.


  • A 12-speed cassette built for the 105 Di2 drivetrain
  • Features 11-34T cogs for optimal gear combinations
  • Combination of the 12 steel cogs optimize acceleration
  • Smaller gears allow for better climbing efficiency
  • Also compatible with 11-speed freehub bodies
  • Item #SHIU1H0
Cog Sizes
11t, 12t, 13t, 14t, 15t, 17t, 19t, 21t, 24t, 27t, 30t, 34t
Cog Material
Freehub Type
Claimed Weight
12.7oz (361g)
Manufacturer Warranty
2 years
road cycling
Manufacturer Part Number
2 years