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  • Shimano - XTR Di2 RD-M9050 Rear Derailleur - Black

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  • Shimano - XTR Di2 RD-M9050 Rear Derailleur - Black

Shimano XTR Di2 RD-M9050 Rear Derailleur

sale $388.99 $572.9932% Off

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    • Black, Medium Cage
      sale $388.99

    2 Reviews


    Intelligent shifting.

    On top of delivering smooth, effortless shifting in all conditions, Shimano’s XTR Di2 RD-M9050 Rear Derailleur will make the aft-end of your drivetrain smarter than it’s ever been before. With Shimano’s Synchronized Shift technology, the front and rear derailleurs operate in sync and have the ability to calculate your efficiency, thus the M9050 can automatically shuttle your chain from cog to cog to set you up with the best chain line for any given situation. This technology also protects the short cage derailleur, by making sure you never run out of chain when cross-gearing. Moreover, Shimano’s E-Tube system allows you to program your preferences beforehand, so your drivetrain is calibrated just the way you like it. Of course, Synchronized Shift can be easily turned on and off as you please. The XTR Di2 RD-M9050 Rear Derailleur is compatible with Shimano’s resilient and hassle-free E-Tube wiring system.

    • Synchronized Shift technology
    • Shifting pattern can be programmed to your preferences
    • E-Tube wiring system
    • Item #SHI005I

    Tech Specs

    3 x 11, 2 x 11, 1 x 11
    Claimed Weight
    [pair] 128 g
    Recommended Use
    Manufacturer Warranty
    2 years

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Great for CX 1x

    • Familiarity: I've put it through the wringer

    Really happy with this RD. I have it on a CX bike set up with a 1x and it works really well. I had a DuraAce RD with a RoadLink but the XTR clutch handles the big range much better without any chain issues.

    Super awesome !

    • Familiarity: I've used it once or twice and have initial impressions

    Have Dura Ace Di2 11-speed on the road steed, now rolling with it on my mt steed :) Total FYI - I am running a SRAM 10-42 cassette, SRAM chain, and SRAM Xo1 1X cranks with this - works flawlessly! I had many hesitations because I love the 1X drivetrain SRAM has to offer as well as the hill grinding 10-42 cassette. Setting up is waaaay easier then running cables, etc.
    Only hard part is, that depending on your frame, where to put the battery and wires. Pre-planning wiring and battery placement is a must prior to install. I have a 2015 Stumpjumper FSR 650b and was able to locate the battery in in the seat tube, just below the dropper post. For the short runs of wires that are exposed, I used electrical shrink-wrap tubing for a super clean look.
    Long term test to follow. I am familiar with the E-Tube set-up and set the rear derailleur to 'fast' - awesome. Also, if you run Di2 on your road bike, the front LED Display already has a junction box, so no need for that. Additionally - if you get the new FOX shocks, you can remotely actuate the shock setting with this stuff also - super crazy.

    I want to run a 1x 40T front, 11-40 rear. Will a medium cage xtr work?