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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
Drivetrain Speed: 11-Speed | |
Cassette Use: MTB | |
Cassette Type: Shimano 11 | |
11-40T | Mfg PartNum: ICSM8000140 |
11-42T | Mfg PartNum: ICSM8000142 |
11-46T | Mfg PartNum: ICSM8000146 |
Reviews
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.
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.
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 :)
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.
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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