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Item # SHI008G

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  • One Color, Medium Cage ($69.95)
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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

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

Reviews & Community

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One sturdy derailleur

  • Familiarity: I've put it through the wringer

I think that the XT groupset is one of the best you can buy at this point. They are fairly light, very reliable, and will last forever. Not to mention, it's super affordable! Easy to install and also really easy to maintain. Might not be the ultra light race set up you want, but is just flat out reliable.

Loving it

    I just put my first XT groupo on a build and I'm loving the clean shifting of this derailleur. The chain retention stabilizer switch is cool once you realize you have it and lock it instead of wondering why things are rattling so much on a descent.... but that's just my bad

    With a 34T oval should I go for the med or long derailleur? I have not decided on the cassette yet. probably stick to 42 and get in shape.

    Hey The Chad - If you are sticking with a 11-42 cassette then the medium cage will work fine for your set-up. Give me a shout with any additional questions.

    Great Set Up

    • Familiarity: I've used it several times

    This was one part of my 1 x 11 set up for a Surly Krampus. Great value and quality. Another outstanding product from Shimano. If you have questions on set ups for your bike make sure you call in to talk to a bike Gearhead.

    My, what a long cage you have.

    • Familiarity: I've put it through the wringer

    With the advent of 1x and the huge big cog, derailleurs have had to keep up with long cages. XT the best working, everyman components on the market. Shifts well and never needs adjustments.

    What cassette size will this handle? Or the longcage version? I need 11-42, but would like to upgrade to 11-46.

    Kevin, this derailleur will accommodate 11-46 in a 1x11 drivetrain or 11-42 in a 2x11 setup.

    Avg. ride time: 4h 19m 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:



    http://www.competitivecyclist.com/shimano-xt-shadow-plus-rd-m786-rear-derailleur

    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 MTBR.com, 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.

    Crisp

    • 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.