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Shimano XT CS-M8000 11spd Cassette 11-40T
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XT CS-M8000 11spd Cassette

Mfg PartNum:
  (5 customer reviews)
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Backorder: This item is currently out of stock but is available to purchase today as a backorder. The expected availability date shown above is our best estimate as to when it will be shipped to you, but this date is subject to change based on our receipt of this item from its vendor. Shipping in the continental US is free for all backorder items (for international orders, our customer service team will contact you when the item is available to ship). Your credit card will not be charged until your item ships (Paypal requires payment up front, but you can cancel for full refund). Anytime prior to shipment, your backorder can be cancelled by contacting our customer service team.

Rhythm rider.

Shimano's 11-speed XT CS-M8000 features the Rhythm Step gear progression that made its debut on Shimano's top-of-the-line XTR groupset. With these close-step gear ratios calculated in conjunction with Shimano's 11-speed XT cranksets, you'll find smooth transitions from gear-to-gear that keep you climbing and charging without a hitch. The largest cog and spider are made from aluminum to maintain a low weight while the rest of the cogs are made from steel for the strength and durability that Deore XT is known for.

Compatible with Shimano / SRAM 9/10/11-speed freehubs. Will not work with XD drivers. Approximate weight is 440 g (11-42T).

Cog sizes:

  • 11-40: 11, 13, 15, 17, 19, 21, 24, 27, 31, 35, 40
  • 11-42: 11, 13, 15, 17, 19, 21, 24, 28. 32, 37, 42
  • 11-46: 11, 13, 15, 17, 19, 21, 24, 28, 32, 37, 46

Note: 11-46 cassettes are compatible with 1x drivetrains only. If switching from a smaller range cassette, a new chain will likely be required in order to accommodate the larger 46T cog. Compatible replacements include the Shimano XT HG701 Chain and the XTR HG901 Chain.

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.


Cassette Type: Shimano 11 


Mfg PartNum: ICSM8000140 


Mfg PartNum: ICSM8000142 


Mfg PartNum: ICSM8000146 

Ordered by Most Relevant First
5 stars
4 stars
3 stars
2 stars
1 stars
Great product
by Brian
Vancouver WA
0 of 1 customers found this review helpful.

I replaced a worn DuraAce cassette with the Shimano M8000 for more durability in winter months. The fit and efficiency is excellent and Ive not noticed any issues in shifting. Great recommendation for the swap by Seth! Thanks again!

Reviewed 10/19/2017
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Perfect Shifting
by Anonymous
Cycling Enthusiast
Pocatello, Idaho

Excellent shifting - Good price on a hard to find item.

Reviewed 9/25/2021
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Great upgrade for my gravel bike
by Anonymous
Cycling Enthusiast

Use it on my gravel bike and it has made climbing with a fully loaded bike a lot easier.

Reviewed 7/18/2021
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Works well
by Anonymous
Cycling Enthusiast
Seattle wa
1 of 1 customers found this review helpful.

Installed with DI2 XT derailleur on a road bike. Does the job for 1x gearing.

Reviewed 2/15/2020
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Shifts great, very reliable
by Bill
Competitive Racer
Middle Tennessee
2 of 4 customers found this review helpful.

I use the 11-46T on my gravel bike with a 42T 1x front chainring. This cassette is reliable and shifts great.

Reviewed 12/30/2016
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