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Item # SHI008G

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Item # SHI008G

The shadow knows.

The big news for Deore XT this year is its new M8000 11-speed drivetrain. This, of course, isn’t the only upgrade for the most trusted drivetrain in cycling. The new derailleur also boasts an easy-to-adjust chain stabilizer and a new Shadow design with optimized slant for more stable positions in any gear. Shimano claims that shifting requires 20% less effort with the new design, and less is good.

If you're still using traditional hanger, the RD-M8000 comes with a link installed so it's backward-compatible. The direct mount, however, eliminates the need for the link, effectively reducing flex, wear, and weight — all good things to mountain bikers. On compatible frames, the system also allows easier wheel changes with thru axles. Another big change is the stabilizer switch trickled down from XTR and Saint derailleurs.

When engaged, this switch helps to eliminate chain slap and dropped chains by increasing spring tension. This is a valuable option for suspension systems that require chainstays and pivots located close to the rear derailleur. The RD-M8000 retains all the last models improvements, including the direct cable path. Your shift housing can enter the stop on the derailleur without the traditional loop of excess housing that often was the victim of contamination and a source of poor performance.

Shimano uses tried-and-true aluminum components in the XT derailleurs. All of the knuckles, linkage plates, and cage sides are made from it. So while it may lack the wow factor of the carbon fiber-laden XTR Shadow, it's more affordable, and if you've been running XT derailleurs as long as we have, you'll know that you'll get plenty of mileage out of it.

  • 11-speed rear derailleur: gs/medium 1x11/2x11, sgs/long 3x11
  • Durable aluminum construction withstands trail abuse
  • Shadow RD+ with stabilizer switch prevents dropped chains
  • Direct Mount option with compatible frames (without link)
  • Compatible with conventional derailleur attachment (with link)

Tech Specs

Cage Length:
[gs] medium, [sgs] long
[gs/medium] 1x11/2x11, [sgs/long] 3x11
Recommended Use:
cross country, trail
Manufacturer Warranty:
2 years

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Avg. ride time: 1h 35m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

XT is the everyman groupo

  • Familiarity: I've put it through the wringer

No, it's not XTR, but mechanically it is the same, and only a little heavier, but a good bit cheaper. I love XT and see no reason to go with anything else. XTR is for the racers with sponsors, XT is for the rest of us

Big bang for your buck

  • Familiarity: I've put it through the wringer

The XT rear derailleur's does shift cleaner than other XT products in the past. The clear advantage is Shimano's new clutch design to provide chain retention, so you can run a 1X configuration with a 11-46 cassette. If you have any questions on this product, I will be happy to help you out.

Do you need the long cage to run the 11-46 on a 1x11?

Smooth operator!

  • Familiarity: I've put it through the wringer

I bought this after Shae( She is great) from the bike dept at backcountry recommend it as part of the parts ( Race Face Narrow Wide Chainring, Shimano CN-HG600 11-Speed Chain,Shimano XT CS-M8000 Cassette, Shimano XT SL-M8000 RapidFire Trigger) to convert my baby (2016 Santa Cruz Heckler) to a 1 x 11. After a 100 miles the the derailleur is still smooth and is tougher that it looks. I had a couple of bad crashes that had me fearing the worst, however it is still going. I could not be happier; all done at a very reasonable price. My only regret is that i did not changed sooner to a 1 x11

Great. Consider adding Goat Link

  • Familiarity: I've put it through the wringer

I use this on a 11 x 46t XT cassette. It is crisp, however it does take a while to dial in. I added the Goat Link 11 and it made the derailleur perform incrementally better.

Based on your experience with the 11-46, would you recommend doing the 11-42 or the 11-46 with the xt8000?

46 tooth hands down. I would much rather have a bunch of gearing the back and if I needed to gear it up a little, just change a front chain ring.

Perfect Alternative

  • Familiarity: I've put it through the wringer

Switched over to a one-by drivetrain and decided on XT as a value and performance component. Shifts great, lightweight, and easy to maintain.

Very nice

  • Familiarity: I've put it through the wringer

Excellent product, light weight, solid feel, precise shifting. Used XT deraileurs for over 20 years -- never been disappointed.

Can I use this RD with a Shimano Saint 10sp shifter and Shimano XT 10sp cassette? I need to replace my Saint derailleur and would like to use this RD-M8000 if it's compatible with my current 1x10 setup.

Hi John! The m8000 derailleur will not work with your 10 speed set up, but the m786 will. Check it out below:

With apologies to Virginia, it is possible to run a Shimano XT M8000 rear derailleur with a 10-speed cassette and shifter. I did so for some 1,500 miles of the 2,000 miles I put on my bike last year and plan to carry over the same setup (Sunrace MX3 11-42T 10-speed cassette with Saint 10-speed shifter) this season. Shifting was smooth, precise, and immediate through the full range.

I chose the M8000 after reading up on other experiences at, and because it offers an upgrade path to 11-speed and can better accommodate a wide-range cassette than the M786.

Only criticism to date is having to replace the jockey wheels as the bearing for the tension pulley seized up.

Bang for your Buck

  • Familiarity: I've used it several times

M8000 rear derailleur is pretty sweet for the money. Shifts crisp and smooth every time. It is more quiet if you pair it with a sram cassette and chain. Does the trick.


  • Familiarity: I've put it through the wringer

I have this paired with a Shimano 1x11 XT system. It works great, shifts are crisp and well defined. Great quality and even better value.

Bang for buck

  • Familiarity: I've put it through the wringer

Bought this because I ripped my XTR derailleur off my bike with a rock. This derailleur shifts and performs similarly to the XTR. Its a bit heavier but only slightly and cost half as much.

Solid Performer

    I've had about a half dozen rides so far on my complete XT 1X11 set up, on mixed single-track, moderate downhill and serious climbs. So far I love it! I know it's not as light as the SRAM drivetrains, but the cost and simplicity of the drivetrain swap pays big time. No dropped chains, no mis-shifts. I'm really loving it. Coming from a 3X or 2X set up, I don't have the top-end road speed, but who cares! If you're thinking about upgrading, do it.

    Get an XT

    • Familiarity: I've put it through the wringer

    This is my third XT rear der ad I've run one them on my other bikes. I tried Sram on my Yeti but went back to XT. Running this newer version on a 2x11. Shifts well and the chain stays on. Can't get anything better for the price and they are very reliable.

    Get an XT

    Best 11sp shifts for the cash

    • Familiarity: I've put it through the wringer

    I love shimano shifting. Its the smoothest, quietest available. Id use xtr but dang it's expensive, so xt will have to do.

    Great derailleur.

    • Familiarity: I've used it several times

    I have always loved XT products, this is no exception. Simple and easy to use, when setup properly it shifts like a dream.

    Derailleur sheared

    • Familiarity: I've used it several times

    First of all, I want to say the customer service is top notch. I have now become a customer for life and will even stay true if the price is a bit more than the competition .
    That being said, I have run all XT m8000 on my bike. I recently replaced this derailleur due to a rock collision that bent the cage like a soft taco. After the new component was installed by my lbs (because my wife had it done for me while I was at work)...I took it on three rides...8 miles, 16 miles and 5 miles, all on hard packed singlet rack with minimal climbs. On the fourth ride day, I was riding the bike at the trailhead (not on the trail) and the body of the unit completely sheared I to three pieces. The connection point of the hanger had a small piece, the gear mech cable had a small piece and the main unit. No hits, no stress, just sheared into pieces. I have no idea how this could happen besides a bad mold on this particular batch. I will still use XT m8000, it shifts like butter and have had no issues before. The customer service rep was on target and helped get a new item in the mail on the fast track since I have a race in 8 days. Fortunately I was under 30 days and the customer service dept honored the return policy. I am a customer for life, competitive cyclist is great!