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Shimano XT RD-M8000 Rear Derailleur

sale $79.95 - $101.99

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  • One Color, Medium Cage
    $101.99
  • One Color, Long Cage
    sale $79.95

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The shadow has it.

Bringing constant refinement to the 11-speed XT drivetrain, the Shimano XT RD-M8000 Rear Derailleur offers improved chain retention when you're riding across jarring, rock-strewn trails. Benefiting from trickle-down technology from the XTR group, Shadow RD+ technology keeps the chain from bouncing around with its handy stabilizer switch. The Shadow design is optimized for increased stability with its slanted position, allowing for silky-smooth shifting in every gear.

The XT's robust aluminum construction takes a serious beating without fuss, equating to worry-free confidence when you're rallying across technical terrain. In conjunction with a low-friction shift cable, Shimano claims shifting requires 20% less effort. Other key features include an easy-to-adjust chain stabilizer for effortless fine-tuning, as well as Direct Mount attachment with compatible frames for a stronger and lighter mount interface. As a bonus for riders with older frames not compatible with Direct Mount, the included link attaches in a conventional manner.

  • The ultimate racing workhorse for mountain derailleurs
  • 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)
  • 11-speed rear derailleur: gs/medium 1x11/2x11, sgs/long 3x11
  • Item #SHI008G

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

Tech Specs

What do you think about this product?

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>Rating: 5

Best money I've spent on my bike

Not even sure why I ever bought a bike with a 3x8 drivetrain... swapped it out with a 1x11 using this shimano xt derailleur, xt shifter, and xt 11-46 cassette and I couldn't be happier! Chain never drops! Shifts smooth and precise.

Not
>Rating: 5

Best value for your money

reliable, smooth shifting. Paired with a 11-46 10spd cassette and a goatlink and never had any problems.

>Rating: 5

You don't need the X

Familiarity:
I've put it through the wringer

In the name of your bike grouppo to get great shifting and light weight. Did I mention inexpensive? XT does everything that its racing big brother does and leaves a little green in your wallet for a good macro brew.

>Rating: 5

Durable

Familiarity:
I've put it through the wringer

I got this derailleur after bending my XTR derailleur for what I thought would be temporary. However, I decided XT is all I need. It's cheaper, works well, and is more durable in my opinion. Don't get me wrong, I loved my XTR setup - especially when I was racing. But now, I want durability for those long days in the saddle (with the occasional race).

>Rating: 5

Dependable XT & near XTR Performance

Familiarity:
I've put it through the wringer

I've ridden the XTR 11spd groupset, and decided that at half the cost, using the same design with heavier materials, it would be worth trying the XT derailleur and cassette (XTR shifter). Boy was I happy! It was nearly impossible to tell the difference in the XTR full groupset I rode vs my XT with XTR shifter. Shifts like butter, no stutter or interrupt mid spin, no hard clunks, and adjustable clutch is a huge +. You can't adjust clutch strength on SRAM comparable models, leaving them with a lot of chain slap - Never had an issue with my XT chainslapping. Also - VERY DURABLE. Took a minor hit to the derailleur by clipping a tree mid-air. Bent the hanger... picked up a new hanger and was good as new! was super worried the derailleur would have issues, but it was completely fine!

>Rating: 5

Go to for rear derailleur

XT is a go to for drivetrain if running Shimano, or thinking of converting from SRAM. Cant beet the quality for the price, and a great pair with e13 9-46 cassette - better range than eagle for a lot less.

how can an 11 speed detailer be used with a 12 speed cassette?

>Rating: 5

Workhorse

Familiarity:
I've used it several times

XT stuff is the real deal. With the latest update, XT honestly feels like XTR. Don't get caught up in the status race. Unless you're a really serious racer, it's hard to make an argument for XTR from a value perspective.

>Rating: 5

Durable.

Familiarity:
I've put it through the wringer

XT is the MTB'er group. The shifting is so close the XTR I doubt anyone will notice. I've used this derailleur with an XT 11-42 cassette and a 1x 30t chainring and it shifts great. It is plenty durable enough you might end up putting it on a couple different bikes.

>Rating: 5

MTB standard

Familiarity:
I've put it through the wringer

Even if it's Shimano's 2nd tier, XT will always be my gold standard. The crispest shifting on the market- the combo of the XT derailleur and shifter leave nothing to be desired. I've used this setup with an XT 11-42 cassette, E*13 9-44 cassette and SRAM 10-42 cassette. Shifts great on all, but with the E*13 you'll want the long cage. Durable enough to take a season or two of smashing into rocks.

>Rating: 5

Great product

Familiarity:
I've used it several times

The xt derailleur is amazing for the price really nice shifting durable strong I really recommend , I was using sram x9 groupset it works really similar so don’t be afraid to try it.....

>Rating: 5

Amazing for the price

Familiarity:
I've put it through the wringer

This derailleur is one of the best I have ever owned. The clutch is great, the shifting is instantaneous, and it is lighter weight than my 10 speed SLX derailleur.

>Rating: 5

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.

>Rating: 5

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

>Rating: 5

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.

>Rating: 5

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.

>Rating: 5

Best combo price/quality

Familiarity:
I've put it through the wringer

Great value, super durable, shifts really well. What more can you ask for?

>Rating: 5

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

>Rating: 5

Perfect

Works great for my 1x11 build on a new Yeti SB6 custom build. Very smooth, cant wait for spring to get ripping!

>Rating: 4

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?

I'm going to get a SRAM 11-42 cassette, will this LONG cage work on my 1x11?

>Rating: 5

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

>Rating:

My current 8000 11 deurailer is broken how do i measure cage to see if it is medium or Long cage

>Rating:

Now, if I use a 1x11 with a 9-46 cassette, should I use the medium cage or the long cage

You'll want the long cage for that E*13 cassette.

>Rating:

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.

>Rating:

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.

>Rating:

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.

>Rating:

So I can use the medium length RD with the 11-42 cassette if I'm running it 1x11, right? The long cage is only required for the triple, right?

Hey Zachary, A medium cage would work fine for 1x11 with an 11-42 cassette. Ben brabinowitz@backcountry.com 801-746-7564