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XT CS-M8100 12-Speed Cassette - OE

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Why We Like The XT CS-M8100 12-Speed Cassette

With so many available options, choosing a cassette for your new mountain bike may seem overwhelming. Shimano brings us a high-quality mountain bike sprocket with the XT CS-M8100 12-Speed Cassette. Using BEAM SPIDER construction, this cassette increases Shimano's mountain bike gearing range without increasing the overall weight. The XT CS-M8100 uses the MICRO SPLINE freehub body and HYPERGLIDE+ tooth profile with a 10-51T cassette range, delivering smooth and fast shifting. A light and stiff construction reduces cassette inertia, providing you with faster acceleration and increased chain security. Made with aluminum and steel cogs, the XT CS-M8100 12-Speed Cassette is built for durability and is sure to keep up with your trail adventures.


  • 12-Speed MTB cassette provides advanced shifting performance
  • Features MICRO SPLINE freehub body and HYPERGLIDE tooth profile
  • Light, stiff build reduces cassette inertia for added speed and chain security
  • Item #SHIU1A9
Cog Sizes
10t, 12t, 14t, 16t, 18t, 21t, 24t, 28t, 33t, 39t, 45t, 51t
Cog Material
aluminum, steel
Freehub Type
Shimano Microspline
Claimed Weight
Manufacturer Warranty
2 years
mountain biking