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  • Shimano - XTR RD-M9000 Rear Derailleur - One Color

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  • Shimano - XTR RD-M9000 Rear Derailleur - One Color

Shimano XTR RD-M9000 Rear Derailleur

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    • One Color, Medium Cage
      sale $139.95

    8 Reviews


    Bling with a purpose.

    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

    Tech Specs

    [pivot body] alloy, [pulley cage] carbon fiber
    Cage Length
    Medium, Long
    Claimed Weight
    [medium cage] 221 g
    Recommended Use
    mountain biking
    Manufacturer Warranty
    3 years

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?


    • Familiarity: I've put it through the wringer

    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.

    Treat Yourself

    • Familiarity: I've put it through the wringer

    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.

    Buttery smooth

    • Familiarity: I've put it through the wringer

    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.

    Precise, smooth shifting.

    • Familiarity: I've put it through the wringer

    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.

    Does what it's told

    • Familiarity: I've put it through the wringer

    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.

    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.

    Solid Shifting

    • Familiarity: I've put it through the wringer

    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.

    Solid Shifting

    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

    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

    Great shifting quality starts here

    • Familiarity: I've used it several times

    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!

    Unanswered Question

    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?

    How do I know if I need long or medium cage?

    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.

    Could you use this derailleur with a 10 speed cassette and shifters?

    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.