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

(10)

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Mfg PartNum:
$104.99-$117.99
MSRP: $104.99-$117.99
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Description

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.

Specifications

Cassette Use: MTB 

Drivetrain Speed: 11-Speed 

Cassette Type: Shimano 11 

11-40T

Mfg PartNum: ICSM8000140 

11-42T

Mfg PartNum: ICSM8000142 

11-46T

Mfg PartNum: ICSM8000146 

Reviews

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Reviewed 4/12/2024
by Anonymous
Cycling Enthusiast
Value Rating
Overall Rating
Good product at a good price

Gear range upgrade for my gravel bike, good Shimano quality. Price was good, shipping fast. Only issue was they refused to ship it to the hotel I was staying at which is odd. Had to get it sent to a friends residential address instead.

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Reviewed 9/14/2023
by Anonymous
Competitive Racer
Kansas
Value Rating
Overall Rating
1 of 1 customers found this review helpful.
Works with GRX 810

I bought this for using on my GRX 810 2X11 setup. It works without modification (i.e. you do NOT need a road link or goat link to make this work). All you need to do is screw in your B-screw more than for other cassettes. You may want to put a bit of purple locktite (this kind is designed for set screws) on your B-screw to make sure it keeps its setting. Cross chaining at the extremes is noisier than say a 11-34 cassette, but usable if needed for bailout.

It took about 50 miles of use to break in and once it did, it is extremely smooth. This is a great gearing option if you a have a lot of climbing planned for your ride.

I don�t use this cassette every day, but when I need it, it makes a bid difference to spin instead of burning out your legs grinding away.

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Reviewed 2/16/2023
by DaveM
Santa Clarita, CA
Overall Rating
4 of 4 customers found this review helpful.
The stock GRX 815 gearing wasn't cutting it

The standard GRX gearing wasn't cutting in the areas I ride. Hills in all directions, so I started to do some research and a couple of YouTubers said they had success with this cassette and a Wolf Tooth DM. I got both, it took about 1 hour to swap on this cassette, swap in the Wolf Tooth and adjust the B tension clearance.

The shifting is superb and I have zero regrets on upgrading the GRX 815 gearing :)

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Reviewed 6/19/2023
by Grumpy old man
Cycling Enthusiast
Pa
Value Rating
Overall Rating
1 of 3 customers found this review helpful.
Worked great with a Road group

Worked great with a Road group

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Reviewed 11/15/2021
by JeffL
Competitive Racer
Eugene, OR
Value Rating
Overall Rating
7 of 7 customers found this review helpful.
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 12/30/2016
by Bill
Competitive Racer
Middle Tennessee
Value Rating
Overall Rating
4 of 6 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 2/15/2020
by Anonymous
Cycling Enthusiast
Seattle wa
Value Rating
Overall Rating
3 of 3 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 9/25/2021
by Anonymous
Cycling Enthusiast
Pocatello, Idaho
Value Rating
Overall Rating
1 of 2 customers found this review helpful.
Perfect Shifting

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

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Reviewed 7/18/2021
by Anonymous
Cycling Enthusiast
Seattle
Value Rating
Overall Rating
0 of 1 customers found this review helpful.
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 10/19/2017
by Brian
Vancouver WA
Overall Rating
1 of 2 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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Mechanic's Corner

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A guide to understanding and calculating bicycle gear inches.
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