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

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rating(9 customer reviews)
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Description

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.

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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(8)
(1)
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(89%)
(11%)
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Great product
rating
by Brian
Vancouver WA
1 of 2 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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Works with GRX 810
rating
by Anonymous
Competitive Racer
Kansas
1 of 1 customers found this review helpful.

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.

Reviewed 9/14/2023
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The stock GRX 815 gearing wasn't cutting it
rating
by DaveM
Santa Clarita, CA
3 of 3 customers found this review helpful.

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 :)

Reviewed 2/16/2023
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Worked great with a Road group
rating
by Grumpy old man
Cycling Enthusiast
Pa
0 of 2 customers found this review helpful.

Worked great with a Road group

Reviewed 6/19/2023
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11-40 works with GRX 810 rear derailleur
rating
by JeffL
Competitive Racer
Eugene, OR
6 of 6 customers found this review helpful.

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.

Reviewed 11/15/2021
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Shifts great, very reliable
rating
by Bill
Competitive Racer
Middle Tennessee
3 of 5 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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Works well
rating
by Anonymous
Cycling Enthusiast
Seattle wa
3 of 3 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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Perfect Shifting
rating
by Anonymous
Cycling Enthusiast
Pocatello, Idaho
1 of 2 customers found this review helpful.

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

Reviewed 9/25/2021
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Great upgrade for my gravel bike
rating
by Anonymous
Cycling Enthusiast
Seattle
0 of 1 customers found this review helpful.

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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