Evil MB owners, what length crank are you using?- Mtbr.com
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  1. #1
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    Evil MB owners, what length crank are you using?

    Curious, I see Evil suggests a 170mm for all sizes. Im running a 175 with a few strikes, nothing major. Ive never ran a 170mm. Do you think Id notice a difference? Good or bad?
    Last edited by Gutch; 01-08-2018 at 07:41 PM.
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  2. #2
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    I'm riding with 175mm cranks in x-low with a 130mm fork and my pedal strikes are minimal. I also ride cognizant of the terrain to be proactive on potential strikes.

    Came from a transition scout, both the MB (x-low) and scout have estimated BB height of 330.

    Had 170mm cranks on my scout and despite there being a minimal difference, I would do 175mm again if given the choice. I appreciate the (very, very) minute leverage increase of the total 1cm advantage.

    If I was pedaling through gnarl rock gardens at all times, I might have a different opinion.

    (have 172.5mm on my road bike in the rare instances I do ride it)

  3. #3
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    ^ good info, thanks for the post. Ill stick with my 175mm currently in just low position on a 140mm Fork.
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  4. #4
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    I'm running 170s. I used to run 175 on all my bikes, tried 170 and liked it a lot, switched all my bikes to 170. More clearance with no real down side for me.

  5. #5
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    Stupid question, but are you actually picking up an actual 5mm of clearance?
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  6. #6
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    Running Next SL cranks and the 170 arms are shorter than 175s but haven't measured them. I do notice less pedal strikes.

  7. #7
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    Crank length should really be a function of your individual height and inseam. It's a pain for bike companies to try and individualize stock builds with multiple crank lengths, so they usually go with a one size fits all policy. If you buy a custom road-bike, you almost always get sized for correct cranks.

    Take a peek at this site for some general guidelines on what might fit you.
    BikeDynamics - Bike Fitting Specialists - Crank Arm Lengths

  8. #8
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    Yes, understood. Usually you see S/M specd with 170mm and L/XL on 175mm. But, with the new trend of lower and slack you are seeing shorter cranks specd for less strikes. Its really not a huge deal for me. Ive always ran L/XL bikes with 175mm. But what bothers me is the occasional pedal strike. Used to NEVER happen. This is why Im contemplating the 170s and probably why Evil specd them on everything. JMO
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  9. #9
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    Im running 170s on a Wreck and Calling. Id always run 175s prior to that. Honestly, Ive noticed no downside.


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  10. #10
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    Quote Originally Posted by godfather View Post
    Im running 170s on a Wreck and Calling. Id always run 175s prior to that. Honestly, Ive noticed no downside.


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    Yeah, my only downside is I already own 175 Next SL G4, that have minimal time on them!
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  11. #11
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    There is an amazing article in mountain flyer titled bottom bracket too low or cranks too long? Its really good showing scientific data that crank lengths from 165-175have no measurable difference in Vo2 max, base heart rate. Cadence was 1 rpm faster between 165 and 175. They measured cranks all the way down to 140mm and up to 220mm. All this being said a shorter crank length will require a higher seat so keep that in mind. Ill probanly be getting the 165 sixc if I build a Hightower LT which is a pedal strike machine. The evil mb isnt bad with 170mm cranks, maybe would buy new ones but definitely consider shorter for future builds. Pedal strikes are lame, but so are high bbs.

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