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

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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.

Shimano's XT CS-M8000 Cassette is designed to pair with Deore XT 11-speed cranksets for smooth gear transitions that keep the rider in rhythm whether climbing or pushing down the descent. It features an alloy spider and largest cog to keep weight low, and the rest of the cogs are made from steel for lasting strength and long wear.

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
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1 stars
Reviewed 11/15/2021
by JeffL
Competitive Racer
Eugene, OR
Value Rating
Overall Rating
11-40 works with GRX 810 rear derailleur

I've got a set of bullet proof alloy DT Swiss wheels I use for bikepacking/touring on my gravel bike and I wanted an extra climbing gear for when I'm loaded with gear. Thankfully you can adjust a GRX rear derailleur to accommodate an 11-40 rear cassette.

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Reviewed 9/25/2021
by Anonymous
Cycling Enthusiast
Pocatello, Idaho
Value Rating
Overall Rating
Perfect Shifting

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

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Reviewed 7/18/2021
by Anonymous
Cycling Enthusiast
Value Rating
Overall Rating
Great upgrade for my gravel bike

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

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Reviewed 2/15/2020
by Anonymous
Cycling Enthusiast
Seattle wa
Value Rating
Overall Rating
1 of 1 customers found this review helpful.
Works well

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

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Reviewed 12/30/2016
by Bill
Competitive Racer
Middle Tennessee
Value Rating
Overall Rating
2 of 4 customers found this review helpful.
Shifts great, very reliable

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

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Reviewed 10/19/2017
by Brian
Vancouver WA
Overall Rating
0 of 1 customers found this review helpful.
Great product

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!

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