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Shimano XT M8000 SM-CRM81 Chainring

Item #: CG196A01
USD$41.99 SAVE 25% USD$55.99 msrp
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Shimano XT M8000 SM-CRM81 Chainring

Shimano SM-CRM81 Chainring

Shimano’s SM-CRM81 chainring features a new tooth profile with Dynamic Chain Engagement. Their new 1x proprietary chain retention technology prevents skips and drops, and lengthens a chain’s lifetime. The combination of wide steel teethe with special hooked teeth improve chain retention and lifespan by up to 150%, even on rough terrain.

Features

  • 11 Speed XT Chainring
  • Stainless teeth for extremely long life
  • 96mm BCD
  • Built for Shimano FC-M8000 Crank
4.9 / 5.0
10 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
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works great, I would recommend it to anyone looking for a good 1x chainring.
April 25, 2017
Purchased
6 months ago
Perfect
Replaced the original shimano m8000 ring on my bike with this updated version and it works great.
March 30, 2017
Purchased
4 months ago
only chainring I need
It's one of the few chainrings that fits my XT cranks. Quality is high as is most Shimano products.
March 29, 2017
Purchased
2 months ago
Location:
PNW
Great chainrings
Great chainring. I was already running the 34 tooth on a 1x setup and needed to go a few less teeth for the climbs. Great design, I've yet to drop a chain. Can't beat the price. There are sexier rings out there, but weight to value and quality you can't go wrong.
The M8000 on my Trek Sawyer ridgid rig.
The M8000 on my Trek Sawyer ridgid rig.
January 24, 2017
Purchased
5 months ago
Location:
Santa Clarita, CA
XT has found the sweet spot
I have only been on two rides but they where in extreme conditions and this 11 speed set up worked flawlessly. XT M8000 Cranks and chainring whith Xt m8000 rear cassette and XTR m9000 rear mech. No dropped chain, no skipping shifts quiet as a ghost.
March 13, 2017
Purchased
3 months ago
Location:
Black Hills SD
great chainring- quiet and durable!
this new Shimano XT M8000 ring works well and is super quiet. And the best thing is that Shimano made it with Stainless Steel teeth so it will last for a while. So it is a bit heavier than the competitors all aluminum rings, but if you are a frequent rider, you dont have to buy a new one every 3 months!!!
April 7, 2017
Purchased
3 months ago
Location:
Lake Forest, CA
It doesn't suck
This is the new XT narrow-wide M8000 solution. I had the CRM80 and never dropped a chain either (bot my XT Shadow has a clutch).
April 21, 2017
Purchased
3 months ago
Location:
The Woodlands, TX
best shimano single wide chain ring.
Being a mechanic of vehicles i know factory parts always work better then after market or outside companies.

It was proven true with bike parts as well. I have used a raceface, shimano, and wolf tooth chain ring on my xt and xtr cranks. I will say that hands down the shimano chain ring gave the smallest amount of noise and resistance out of all three.

Proof was in the pudding ! Riding shimano chain and derailleur... buy a shimano chain ring.
January 5, 2017
Location:
apex, nc
New Chainring
Seems like good quality. No issues! Only one ride so far, but I am happy!
February 6, 2017
Purchased
6 months ago
Location:
Fruita, CO
Good performer best when matched with a Shimano chain.
First installed this ring with a used KMC chain and it felt a bit notchy to freewheel. After installing a new XT chain it felt better but not as smooth as other brands I have used. From new initially the XT is also slightly on the noisy side when setting up in the bike stand but on the trail it is not noticeable.
Once bedded in both the noise and notchy feel have disappeared. As expected it's on par with all others as far as chain retention as I have not dropped the chain whilst using it for trail riding.
My Bike. SC Bronson C Full XT group
March 29, 2017
Purchased
4 months ago
Location:
Brisbane, Australia

Q & A

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Browse 6 questions Browse 6 questions and 19 answers
Does this one come with the bolts?
Zinsser on Jun 6, 2017
BEST ANSWER: It didn't. Mine came in a flat blue and silver shimano envelope.
Can it be fitted on a m7000 crank?
Edmo d on Jun 18, 2017
BEST ANSWER: Edmo, I don't think so...but I always ask the helpful people at Jenson USA. They are by far, the experts here! :)
Did Shimano change the style of the M8000? I own the this chainring in a 32t but was wanting to get the 30t. My current chainring has much longer straighter teeth that holds the chain on extremely well, which is why I purchased it.
A shopper on Feb 11, 2017
BEST ANSWER: yes the new CRM81 is different from the CRM80, it has more pointed teeth and is supposed to be quieter and more durable with the stainless steel teeth, and just a little heavier, but I will take the slight weight difference for the longevity
can this be bolted up to a sram S2210 crank?
A shopper on May 11, 2017
BEST ANSWER: No. It is specific for the asseymtric 96 mm BCD XT cranks
When using this as a 1x on M8000-2 cranks, will I need to use chain ring spacers to optimize the chain line?
A shopper on Apr 24, 2017
BEST ANSWER: It depends on your frame. This would be the correct choice for a non-boost bike (135 or 142mm rear spacing). If you have a boost frame (148mm), then you would need the M8000-1 version with 50.5mm chainline.
What is the width of this, 3/32 or 1/8?
A shopper on Mar 16, 2017

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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.