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Shimano XT CS-M8000 11 Speed Cassette

Item #: CS212B03
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Shimano XT CS-M8000 11 Speed Cassette

Shimano XT CS-M8000 Cassette

Challenge new trails with unmatched efficiency and performance.

Shimano's XT M8000 11-speed cassette is the key to taking full advantage of the Dyna-Sys 11-speed system. This cassette is specifically designed with a wide gear combination and carefully balanced ratios for you to find that perfect gear on the trail. Through its carefully-calculated Rhythm Step gear progression, the XT M8000 Cassette decreases "shock" and lost power as you shift gears, ultimately delivering smoother and more precise gear changes.

Shimano constructs this cogset using a combination of steel and aluminum cogs and carriers, striking an optimal balance between light weight and durability. With Shimano’s CS-M8000 on your steed, you’ll expand your range to take you to new trails never before possible. Whether you're a rowdy trail rider or an cross-country racer, the XT M8000 Cassette is ready for whatever you can throw at it.

Shimano XT CS-M8000 Cassette Features:

  • Optimized Rhythm Step gear progression for increased pedaling efficiency throughout the range
  • Combination of aluminum and steel sprockets saves weight, maximizes durability
  • Wide cassette ranges: 11-40T, 11-42T or 11-46T
  • Aluminum cassette cog carrier interface prevents freehub gouging on larger cogs and reduces weight
  • Fits exisiting 8/9/10/11 speed Shimano HG freehub bodies, no need for special freehub body.


  • Model Number: CS-M8000
  • 11-Speed Shimano Dyna-Sys compatible
  • Fits on 8,9,10, or 11 speed freehub bodies (Freehub Spacer required for 11-speed freehubs)
  • Series: Deore XT M8000 Dyna-Sys 11
  • Number of teeth on Sprockets:
    • 11-40T: 11-13-15-17-19-21-24-27-31-35-40
    • 11-42T: 11-13-15-17-19-21-24-28-32-37-42
    • 11-46T: 11-13-15-17-19-21-24-28-32-37-46
  • Weight:
    • 410g (11-40T)
    • 433g (11-42T)
    • 439g (11-46T)
  • 11-40T and 11-42T cassettes are compatible with Single, Double and Triple chainring configurations.
  • 11-46T cassettes are compatible with Single chainring configurations only.
4.8 / 5.0
245 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Upgraded from XT 10 Speed
I ordered this to do a 1x11 drive train upgrade on my Giant Anthem. Got this in combination with the new XT M8000 rear derailleur. I am one of those people that shifts all the time so shifting had better work right. My old setup used the XT 10 speed derailleur and cassette with a Wolf Tooth 40T GC, 16T replacement clog and GoatLink. While the old setup was great, this new setup is just flawless. The best part is all works right out of the box. No messing with adjusting the derailleur, B set screws or anything. Totally satisfied.
June 24, 2016
Gilbert, Arizona
Solid 11-speed perfomance cassette
I think the XT 8000 cassette is a better value than most of the Sram 11 speed options, so I use this cassette with Sram shifter and derrailleur. No compatibility issues.

PROS: Versatile, durable
April 18, 2016
Colorado mountains
Works perfect
Was exactly what I was looking for. Something that would allow me to run a 32 front while still having the low range bailout offered by the 46t
December 20, 2016
9 months ago
North Texas
Light, precise and reasonably priced
I had to wait a long time for this to come available, but it was worth the wait. I was able to put together a 1x11 drivetrain with mostly SRAM components and this XT cassette for a fraction of what it would have cost to use the SRAM 11 speed cassette. Works perfectly with all the X1 components and any standard wheel set. Saved $100s!

PROS: Lightweight, Easy To Install, Attractive Design

BEST USES: Upgrade, Mountain Biking
September 8, 2015
Issaquah, WA
M8000 awesome set for 1X11
Shimano has set the mark with this XT M8000 setup for 1x11and it is reasonablely priced. I swapped out complete drivetrain for under $400(minus crank, I have carbon crank I wanted to keep) Finally got rid of the front derailleur! I went with 30 chainring in front and 11x42 in rear and don't feel like I am missing any gears, other than on climbs in big ring when you want a little more power and less spinning the jump from the 42 to 38 you can feel if you shift during climb.11x40 may be smoother option for stronger riders(I am 55 years old so this is the right setup for me)). Set was super easy and shifting is smooth and easy.

PROS: 1x11 Setup, Easy To Install
October 9, 2015
Lake Oconee Georgia
Solid stuff
Love the XT stuff. Would give it a 5 star if the gear splits were better. That jump from 37 to 46 is huge. Would like to see a 40 to 46 instead.
December 30, 2016
9 months ago
Fruita CO
Great range 11t to 46t
I was a bit skeptical about how well the rear would shift to the 46t cog but its has shifted flawlessly so far. (I have an XT rear derailleur with the stock screw.) Having the 46t on the rear allows me to increase the ring size in the front. This is a great upgrade.
December 18, 2016
10 months ago
I would buy this again
quality product, but I did need to add a spacer between one of the sprockets for my industry nine hub.
August 3, 2016
San Clemente, CA
Shimano's Smooth Shifting is now 11 speed in XT
Quick delivery in a well packed box. Site works great. Order filled and shipped without any issues.
August 21, 2016
New Hampshire
Smooth shifting, great range
Fast delivery
October 3, 2016
Saratoga Springs NY

Q & A

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Browse 23 questions Browse 23 questions and 80 answers
It states the max rear cassette cog is 42t, yet Shimano has their 11spd 11-46t cassettes in this same line, are they compatible with 46t or is there another offering from shimano which is?
Vilendank on Dec 26, 2016
Shimano XT CS-M8000 11 Speed Cassette
Shimano XT CS-M8000 11 Speed Cassette
Shimano XTR RD-M9000 11S Rear Derailleur
Shimano XTR RD-M9000 11S Rear Derailleur
Shimano XTR CS-M9001 11 Speed Cassette
Shimano XTR CS-M9001 11 Speed Cassette
BEST ANSWER: Hello - If you are running a single front chainring, then you can use the 46 tooth cassette with the GS (medium cage) derailleur. If you have 2 or more chainrings up front, you will need the SGS (long cage) rear derailleur.
Do I need to change rear-wheel hub (or a freehub) to upgrade from Shimano SLX 9-speed cassette?
AlMuz on Jun 21, 2016
BEST ANSWER: If you wheel was built with a 8/9/10 speed compatible freehub body, then you do not need to upgrade. Shimano 11 speed works with 10-speed compatible freehub bodies.
Will this fit to my existing 9 speed hub?
Zinsser on May 24, 2017
BEST ANSWER: Yes, this 11 spd mtn hub will fit on 9,10 speed shimano hubs. Only Shimano 11spd road cassettes require a new 11spd road hub body.

Maximum Sprocket "42T(2x11-speed)"
jola on Sep 13, 2016
BEST ANSWER: Yes you can run the XT M8000 11-42T cassette as described on the Shimano site. When originally introduced by Shimano the 11-42T was marketed as the only 1x11 setup. Since the introduction of the 11-46T it appears the marketing has changed, but not for the Jenson USA site. Even so, if you're running anything smaller than a 34/24 chainring you may want to reconsider your overall ratios, as this may be too drastic a change for any wheel size up to 29" I run a 30T chainring with a 11-42T cassette on a 29" wheel 30 pound bike and I can ascend anything except the steepest climbs. A 28T with a 11-42T on a 29" wheel will give me optimum climbing ability. A 28T with a 11-46T would be overkill unless all I was doing was climbing mountains. Consider your previous ratio and where you want to go from there. I went from a 22x34=.64 to a 30x42=.71, compare that to 24x42=.51 Try to find something close to .58 to .60 if the climbs aren't the steepest but if you're doing long steep climbs then .51 may be right in the ballpark. Enjoy.
I have the 2x10 XT rear derailleur would i have to get a new one or do anything to go 1x11?
dracker a on Jan 20, 2017
BEST ANSWER: Although I got the 2x10 to work, I just wasn't satisfied . The shifts just were not as crisp as they need to be. My opinion, So I ordered the 1x11 derailleur and it is performing nice crisp shifts without fail. I am also a believer in matching the designed parts for not only drivetrains but other systems as well. So yes pls get the 1x11 derailleur and save some headache. Thanks and happy cycling
1. Is this going to work with a 1x11 GX derailleur?

2. Will this fit my existing crankbrothers iodine 2 HUB? (Currently setup with a 1x10)
Joy on Aug 28, 2016
BEST ANSWER: You can absolutely run this cassette with a SRAM groupset. Perfect alternative if you can't run an XD driver on your current hub.
Is the 11-46 cassette compatible with medium cage (GS) derailleurs on 1x11 setups?
1x11curious on Aug 29, 2016
BEST ANSWER: The rear has a chain wrap max of 35t and the formula to calculate
the allowable chain wrap with a single chainring setup is Large cassette cog - small cassette cog which = 35.
the 11-46 cassette therefore would be ok since the chain wrap for the is 35.
The 11-46 cog. would the RD GS work with it or the SGS?
Flash on Sep 1, 2016
BEST ANSWER: GS or SGS will both work with the 11x46 cassette.....the SGS may give a little chain slap when ripping the 11 cog in the gnar. While the SGS will work it's primary design was for use with triple chainrings which are not compatible with the 11x46 cassette.
Sent from my iPad
Well this fit on a Chris King Ten speed XD Driver for sram?
bill on Nov 15, 2016
BEST ANSWER: XD drivers only work on SRAM 1x11 systems they are not compatible with shimano cassettes
Sent from my iPhone
Is this 46T compatible with XTRs (" XTR RD-M9000 11S Rear Derailleur GS Cage"
and "Shimano XTR SL-M9000 11SPD Shift Lever Right, 11 Speed")?
Gee on Sep 1, 2016
Hi I could really use some help ! I'm going from a 38/22 rings 11/40 cass and looking at a11 sp single set up but my knees aren't what they use to be . How close would the 22/40 ratio be to a 30- 46 or. 30-50 It seems to me it should be in the ball park. I just want to dif between 11-46 & 11/50 Compared to the 22 - 40 ? Any help would be greatly appreciated Thx again . John
John P on Jun 1, 2017
BEST ANSWER: My answer would be to stick with the double chain ring and go to a 42 or 46. I run a 36x22 with a 11-46 and it works great. If you ride cross country with some steep hills don't worry about a little bit of weight savings it will save your knees. I ride in the desert with a lot of steep climbs and you better be young to climb with a 1x system.
Should the 11-46 flavor work with a standard XT shadow derailleur? Should the B screw be enough to get the upper derailleur pulley off the cassette when in the 46t cog?
Biker Bryan on Apr 19, 2017
BEST ANSWER: Yes, any 11 speed Shimano MTB derailleur will work with the 11-46T just fine without any modifications.
Hello there, I want to buy the shimano casset but was wondering if the cassette is compatible with a sram X9 10 speed - 12x142 rear hub? It a free hub body? Thanks
D'avenir on Mar 11, 2017
BEST ANSWER: What you need to check is the freehub body style (shimano style or SRAM x-driver) and the width of the Hub. At first sight, your hub has a shimano style body, si I would say yes. BUT the hub is probably not wide enoguh to fit a 11 speed casette. I would personally would upgrade my hubs. I believe there is a sram x9 freehub body that could do the trick. My final sugestion, talk to the manufacturer.
Can it fit to shimano-11speed-road-hub? I love long-ride and i need more large cassette.
Tonix on Aug 17, 2017
BEST ANSWER: Yes. But you may need a different derailleur with a long cage.
Will this work with my Rival derailuer? 1X 11
mlshepherd on May 12, 2017
BEST ANSWER: You need to check that the derailuer is a long cage, otherwise you will not be able to use the sproket with more than 36 teeth.
My set up right now is Shimano XT M8000 11-42 and 1x 30 , GS rear derailleur. Would the GS works if I change the cog to 11-46?
Flash on Sep 2, 2016
Not sure, I would not go 11x46. I went with an 11x42, with one up 18t and 45 extender. W/32 oval up front. The 45 is too much of a granny. Now abs black makes a 30 t oval chainring, that would be sufficient for me with an 11x42.
Sent from my iPhone
can the shimano xt 11 speed cassette fit on the rear hub of this? thanks
A shopper on Jul 7, 2017
Shimano XT CS-M8000 11 Speed Cassette
Shimano XT CS-M8000 11 Speed Cassette
Spank Spike Race 28 Enduro 26
Spank Spike Race 28 Enduro 26" Wheelset
BEST ANSWER: I'm pretty sure it can only fit up to a 10 speed
Can I use this (46 teeth) with Sram XX1 11spd shifter and rear derailer? I currently run an 11spd Sram XX1 42 teeth cassette
Deepeey on Jun 3, 2017
BEST ANSWER: YES it will work. My friend is using X01 setup with shimano 11-46 and its perfect.
Can I use the 11-46 cassette with Sram Rival 1 rd and shifter?
Jfike18 on May 21, 2017
BEST ANSWER: You would need a bigger derailleur a longer chain and beside, I don't think the chain alignment would work.
Is different from road bikes to MTB?
The smallest chain rings that I'm aware of on road bikes are 33/50.. Likely you may not find a chain long enough??
Are there any compatibility issues I should be aware of with the 46T? Planning to build an XT 1x11 drivetrain with the 30T chainring and med cage derailleur.
A shopper on Apr 5, 2017
BEST ANSWER: Based on your description, it sounds like you will be fully compatible, and will have a solid amount of climbing gearing.
Keep Pedaling!
hi, i have a 2x10 shimano xt set up. can i use the m8000 cassette 11/42 and still use my front derailleur, 22/33 crank up front? I know i have to change the rear derailleur to 11 speed and shifter. thanks
Erwin on Apr 15, 2016
BEST ANSWER: The 42 & 46 both require a single chainring
Is this cassette compatible with boost 148 right out of the box? Or would I need something else to make it work?
Joe on Apr 14, 2016
BEST ANSWER: Hey Joe! That cassette is boost ready!!
What size of derailleur cage do you need to use with this cassette?
J on May 16, 2016

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Free Shipping Offer

Get free Standard Shipping with your $50 purchase today! Just choose Standard Shipping during checkout.

Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items.