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Shimano XT CS-M8100 12s Cassette
Sale price
$195.00
Regular price
$195.00
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SKU: ICSM8100045 Option: 10x45 / Black
Pickup available at RA Cycles Brooklyn
Pickup available at RA Cycles Walnut Creek
Qualifying customers may be able to pay with their HSA or FSA through Flex. Flex disclosures (opens in a new tab)
Stock Availability by Location
RA Cycles Brooklyn In stockLow stock (1 left)Low stock (2 left)— Out of stock— Not immediately available
105 5th Ave, Brooklyn, NY 11217718-636-5242
* Available for in-store pickup in 2-4 hours
* Available for in-store pickup in 2-4 hours
* Available for in-store pickup in 2-4 hours
RA Cycles Walnut Creek In stockLow stock (1 left)Low stock (2 left)— Out of stock— Not immediately available
2099 Mt Diablo Blvd, Walnut Creek, CA 94596925-433-7099
* Available for in-store pickup in 2-4 hours
* Available for in-store pickup in 2-4 hours
* Available for in-store pickup in 2-4 hours
Distribution Center - East In stockLow stock (1 left)Low stock (2 left)— Out of stock— Not immediately available
Distribution Center - Central In stockLow stock (1 left)Low stock (2 left)— Out of stock— Not immediately available
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Shimano XT CS-M8100 12s Cassette
$195.00
Shimano XT CS-M8100 12s Cassette Info
The Shimano XT CS-M8100 12s Cassette sits at the heart of Shimano's 12-speed mountain bike drivetrain — a cassette that delivers the same wide gear range as the flagship tier but built from a combination of aluminum and steel rather than titanium. That construction keeps weight competitive while prioritising the durability that trail and enduro riders actually need over thousands of kilometres. Both available ratios — 10-45T and 10-51T — are compatible with 1x and 2x setups, covering everything from cross-country to steep technical terrain.
Compatibility requires a Micro Spline freehub body, which is worth confirming before ordering if you're running an older hub. The Hyperglide+ tooth profiling is designed to maintain smooth, precise shifting under load — a meaningful advantage when you're pushing hard out of a corner or grinding up a sustained climb and need the rear derailleur to find the next gear without hesitation.
Shimano XT CS-M8100 12s Cassette Specs at a Glance
- Speeds: 12-speed
- Cog range: 10-45T or 10-51T
- Weight: 461g (10-45T) / 470g (10-51T)
- Material: Aluminum carrier, aluminum/steel cogs
- Freehub compatibility: Micro Spline only
Shimano XT CS-M8100 12s Cassette Video
PRICE MATCH GUARANTEE
We will price match against advertised or quoted prices from other authorized dealers of the product!