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  • Shimano XT Dyna-Sys FC-M785 Double Crankset Black

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  • Shimano XT Dyna-Sys FC-M785 Double Crankset Black

Shimano XT Dyna-Sys FC-M785 Double Crankset

sale from $161.99 $269.95 40% off

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    • Black, 175mm/26-38
      Sale  $161.99
    • Black, 175mm/24-38
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    5.0 5 12

    12 Reviews


    When one isn’t quite enough.

    Shimano’s XT Dyna-Sys FC-M785 Double Crankset crosses the line between a more limited one-by gearing and a cumbersome 3x10 with gears you never use.

    Shimano is notorious for sending technology from its high-end groupsets down the pipeline, and true to that mantra, the XT Hollowtech II crank arms receive the asymmetric design that is a marker of XTR. A 24mm hollow spindle is pressed into the right arm in the factory. Two pinch bolts secure the arm once the bearing preload is set. As far as the design of the chainrings themselves, the small ring is designed to move the chain up and then back down without slipping. When paired with the asymmetric chain, you’ll never miss a beat.

    • Hollowtech II Crankset
    • Compatible with Shimano
    • Item #SHI0403

    Tech Specs

    Arm Material
    Arm Length
    170 mm, 172.5 mm, 175 mm, 180 mm
    Chainring Sizes
    28 / 40 t, 26 / 38 t
    Bolt Circle Diameter
    104 mm
    Bottom Bracket
    Shimano XT
    BB Type
    BB Threading
    Recommended Use
    mountain biking
    Manufacturer Warranty
    2 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

    In my opinion XT is the workhorse for Shimano. All the great technologies of XTR at a cheaper price point. I've been running this crank with a single ring for 2 years on 2 different bikes and have had zero issues. If you are looking for a durable crank at a great price this is it.

    why spend more on XTR?

    • Familiarity: I've used it several times

    as with several components in the shimano line, I find it hard to justify the additional cost of the XTR crankset vs. the XT crankset. this 2x (mine is 40/28) is incredibly stiff with only minor weight concessions. i paired it with the e-type XTR front derailleur and XTR shifters. set-up is incredibly easy, and shifting is smooth on all trail conditions. solid performance/price ratio.


    • Familiarity: I've put it through the wringer

    I've been using XT cranks on many of my builds since the late 90's. They are relatively light weight and eXTremely durable (see what I did there?) Sure, they are not as lightweight as XTR's, but you only need those if you're some kinda pro racer! Seriously, who are you trying to kid?! The most awesome thing about these XT cranks (besides coming in 2 different colors, hollah!) is that they are quite affordable, even more so when they're on sale! The included BB installs easily and is smooth like buttah. You won't be disappointed with these cranks.


    • Familiarity: I've put it through the wringer

    As we all know XT is the workhorse of Shimano. Not only will it not break the bank but it will last forever. I ordered my girlfriend a full XT groupo because I knew it would withstand the punishment. I just upgraded her group to a 1X setup with a wolftooth and I must say that I’m jealous of her little ripper now.


    i see your set up and like it. i'm currently running a single speed with a 104 bcd crankset. do you know if i could remove the rings on this SHIMANO XT DYNA-SYS FC-M785 DOUBLE CRANKSET and put on my single current chain ring? your (or anyone else's) advice would be appreciated). what do i need to think about?


    • Familiarity: I've put it through the wringer

    This crankset combined solid Shimano shifting performance with a package this is lightweight and Strong for a steed from XC to DH. DH? Really? Yes, the 104 BCD allows you to run a single ring easily if you'd prefer. From the hollow crank arms to sturdy chainrings, this crankset can take some abuse. It includes an English threaded BB.

    The Standard in Cranksets

    • Familiarity: I've put it through the wringer

    Shimano's Hollowtech II system is the best crankset design on the market. It delivers top-notch stiffness with bombproof durability. When the time comes to overhaul your crank/BB (which isn't very often with Shimano), the simplicity and ease of doing so is also the best out there. The non-driveside crankarm is secured with triple redundancy, so there is simply no way it will loosen. My only complaint with Shimano doubles is the chainline is a bit closer than with SRAM, something to note if you are running any sort of guide system.

    You Don't Actually Need "Better" Crank

    • Familiarity: I've put it through the wringer

    The Shimano XT Dyna-Sys Double crankset is a get it done well component...Light, stiff, and solid...the Dyna-Sys chainrings are stiff and shift awesome. Don't hesitate to upgrade your heavier, old crank with this won't regret it.

    Light, bombproof, stiff.

      You get all three. It's a wonderful thing. Truthfully, you could run most any crank from Shimano and be happy with it. This one looks better, is a tiny bit stiffer and lighter, and shifts marginally better than lower-tier cranks. Well worth the dollars.

      If I got the 28-40, could i replace the...

      If I got the 28-40, could i replace the 28 with a 26?

      Unanswered Question

      Is the listed weight of 740g including the...

      Is the listed weight of 740g including the BB or no? Other websites list it and comparable cranks at around 820g. Shimano itself does not list weights of their products. Hard to find the truth it seems. Have any customers here weighed theirs?

      Unanswered Question

      specs say BB Threading: English, yet lists...

      specs say BB Threading: English, yet lists a press fit bottom bracket part number. So is it press fit or threaded?

      Will this crankset work on frame with a...

      Will this crankset work on frame with a PF30 bottom bracket?