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XTR RD-M9000 Rear Derailleur
Shimano’s new M9000 XTR Rear Derailleur puts the components giant back on track in its never-ending battle with SRAM for drivetrain supremacy. Though years late to the one-by party (and, some would say, still not quite there), the new XTR derailleur is capable of handling cogs up to 40 teeth, while still allowing for a 10-tooth difference in front chainrings, should you choose to run them. Shimano altered the parallelogram of the derailleur a bit, and also moved the top pulley wheel to allow for greater capacity without resorting to bottoming out the B-screw.
While it was at it, Shimano also decreased the profile of the derailleur cage by about 30mm to better keep rogue sticks and muck from getting to it. The clutch is now externally adjustable, too, so no more fiddling with that tiny wrench. While most of us will probably keep leaving it in the "on" position, the ultra-smooth shifts that accompany the "off" setting are tempting when the change is so quick.
- Increased capacity over previous versions
- 11-speed design
- 40-tooth maximum cog size
- Long and Medium cage options
- Item #SHI003Z
What do you think about this product?
November 30, 2018
Long live 11 spd
I understand the benefits of 12 speed but this der. and this group is super nice and with crisp clean shifting and the durability these have, what else do you need?
DJ Redundant II
May 1, 2018
Solid smooth consistent shifting! Super light, also looks rad. By no means a necessity over XT but hey, why not?
January 9, 2018
Best shifting, more precise, sexy, light, good price, strong...
December 27, 2017
shifting performance is dialed
so if you don't want to upgrade and go electronic, this is the best you can really get. Electronic shifting is nice, but the price is still high. This shifting performance is about as good as it gets before making the jump to electronic. Shimano is just so smooth.
June 23, 2017
XTR stuff is obviously great. Whether you prefer it over the SRAM offerings is purely personal preference really, I've had both recently and couldn't even say which one I prefer so I just go for whatever I can find the best deal on. I've had this derailleur for a few months now and it has performed flawlessly. My only beef, and the on area where I think SRAM is the clear winner, is in how you disengage the derailleur to remove your rear wheel. On SRAM there's a handy lock button, so you just extend it full and lock it in that position and it stays out of your way. Instead of that option, Shimano just let's you flip a lever to disengage the clutch so that there' s no resistance. This means you still have to flip the derailleur while pulling the wheel out (I know, life is SO HARD), but more importantly it means you have to remember to re-engage your clutch once your bike is back together. I always forget until I'm part way into my next ride and wonder what all the noise is about. That's a pretty minor, possibly even stupid, complaint so I still give it 5 stars. If you're shopping for this stuff you're probably making lots of decisions about where to splurge for XTR and where to save some pennies (lots of pennies) and go XT. Both are great really... I've always done as much XTR as the pocketbook allows to save weight, but I've also always been happy with both groups.
August 31, 2016
I have been running XTR on my bikes for awhile and the quality of shifting is hard to beat. Shimano continues to bring quality product that performs at a best in class level. You will not be disappointed with this rear derailleur.
July 1, 2016
Nice looking piece of machinery. The carbon looks great. Works very smooth and it was easy to set up.
June 16, 2016
You deserve to ride XTR. You've been treating yourself right. Eating well, watching the carbs. Treat yourself with beautiful carbon and aluminum. It will shift well and is a big improvement with its super strong cam lock to keep spring tension high and your chain where it belongs.
April 6, 2016
If you are looking for buttery smooth and precise shifting, shimano XTR is for you. Carbon mixed with high end metals makes this puppy light and strong. I won't ride or buy anything else! Trade in your Sram, you won't regret it.
February 17, 2016
Precise, smooth shifting.
The functionality and efficiency that is to be expected from Shimano components paired with a sleek, aesthetically pleasing finish make the XTR M9000 derailleur a go-to component for your mountain machine. Whether you are racing XC or slaying single track, XTR flat out performs when you need it to.
July 28, 2015
Does what it's told
I have the medium cage for my 1x setup. If yuo're running a 2x, the cage length will depend on your chain wrap, and a 3x system will require the long cage. My drivetrain is a mashup of the XTR rear derailleur and chain, a SRAM X01 10-42T cassette, and a RaceFace Next SL crank. Despite being from 3 different manufacturers, everything works in harmony. The clutch on the XTR 9000 is simple to use, and keep the chain in tension and quiet. I shift, it moves, not much else you can ask of a derailleur.
August 4, 2015
Im running a mid size raliegh detour. With x7 10 spd ext.action derail and 8 piece cassette with the stock z chain on that i would almost put the plnk slip down on.thats without the front and rear baskets and lights. E.but have a 9set with the 9x.sram.all miss matches parts but will work with correct chain that i nneed to learn how to match up correct. If it' shifts as well and as quicki as x7 is now i hope it was worth all the late night dmp,s we roaduess it would btrack only,almost maybe I'll puf that onmy ladies early90.sraliegh with thee 26 x 1.95s. . Does it sound like im on the right track without loosing comfort. I can onley imagine how fast for a first time build.
August 4, 2015
I have a older ugly 9 speed unmatched sram selector that l m just rebuilding .but im not sure how to figur what chain.
May 18, 2016
Jon, thanks for your insight. Super helpful!
May 9, 2015
The new design of the XTR derailleur is sleek and sharp looking. Once on the trail the rear derailleur shifts flawless even under load. The clutch lever is tucked in nicely and easy to switch on/off. No hint of chain slap on rough trails too.
August 4, 2015
Whats the diff. Between the x 7 ext. Action and just x 7 one to one ratio. Besides the length of the arm tha pullyies mount on .should i be looking at cranks also, cause i pull a trailer that was bought from wallmartt.but I've made a lot of customchanges to.witch i plann to haul alot
August 4, 2015
Im hopplng to put electrical moterson the cart kinda to assist more than control fully. But on a real tight budget. And also not to look motterized. I have few different ideals for moters,battery design, etc...but wer do i go to find beltsand pullys.and or chainsand sprockets i would like toc some other
February 16, 2015
Great shifting quality starts here
This rear derailleur really performs. It has solid shifting feel and actuation; it is easy to set up (no mix master routing like the XX1). The clutch performs quite well also, no chain slap on my Ti frame which definately calls out when this is happening!
May 13, 2018
could I put this derailleur on a ten speed bike?
July 29, 2017
I crashed on my giant reign and tweaked my rear derailleur. I can't shift in to 1 in the back and there's clicks and noises that weren't there before. The derailleur was a little messed up before that to and I had people telling me to take a chain link out, buy a new chain, buy a new derailleur, and buy new sprockets. I got the bike only a couple months ago and as far as I know all the chain drive and sprockets are what came with the bike. Someone said the sprockets could be worn out. Any info would help. Will this derailleur fit with the components on a 2007 giant reign x1?
April 19, 2016
I heard that Shimano is coming out with a 42 and 46 rear cassette. It sounds like it will work with the 42, but will it work with the 46 and if so, do I need the long cage or medium cage?
December 20, 2019
January 4, 2016
Will this work with an XT M8000 11x42 cassette?
January 9, 2016
Yes, I currently am using that setup. Works greats, smooth shifting.
June 17, 2015
How do I know if I need long or medium cage?
July 27, 2015
it will depend on your chainring and cassette, but you will most likely need med cage if you are running 1x
March 28, 2016
If using 11-40 cassette (as recommended by Shimano), here's what to use. A single ring up front will use a GS (med cage). Double up front will use GS if difference between large and small ring is 10 or less, SGS (long) if 12 or more. Triple up front will use SGS. There's always some wiggle room (11-42 cassette or 12 tooth front difference), but that will require remembering not to 'cross-chain' (big ring + big cog) while out riding.
December 20, 2019
if you are running a 50t cassete go with the large if you´re running 42 or 46 medium will work very well
May 19, 2015
Could you use this derailleur with a 10 speed cassette and shifters?
May 24, 2015
Unfortunately, the New Shimano 11 speed mountain stuff is not backward compatible with their 10 speed set ups.
September 10, 2015
Hey Gavin - It has now been proven you CAN use this Derailleur with a 10 speed cassette and shifters. People with a 40 tooth cog on their cassette will find this Derailleur will make their shifting as smooth as it was with their stock cassette. Many riders have made this modification and highly recommend it.
April 2, 2015
does this come with the shifters and cable?
April 3, 2015
these do not come with the shifters or cables