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  1. #1
    Witty McWitterson
    Reputation: ~martini~'s Avatar
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    curious question.

    I've got thoughts rattling around in the noggin.

    Is there any reason why one shouldn't use an 83mm bb shell? I know you're limited to FR style cranks at that point, and length may be limited. 175's won't be easy to find. Race Face does make them though. E13 does as well. Its a fat bike, and weight isn't the biggest concern either. I'm not interested in running a BFL in the rear of the bike, so making accommodations for it seem...not necessary. I am slightly interested in a narrower Q factor, but its not the driving force here. Talk me out of it if you would.
    Just a regular guy.

  2. #2
    Nouveau Retrogrouch SuperModerator
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    Quote Originally Posted by ~martini~ View Post
    I've got thoughts rattling around in the noggin.

    Is there any reason why one shouldn't use an 83mm bb shell? I know you're limited to FR style cranks at that point, and length may be limited. 175's won't be easy to find. Race Face does make them though. E13 does as well. Its a fat bike, and weight isn't the biggest concern either. I'm not interested in running a BFL in the rear of the bike, so making accommodations for it seem...not necessary. I am slightly interested in a narrower Q factor, but its not the driving force here. Talk me out of it if you would.
    Generally, you need the 100mm shell to have the chain clear the tire unless you are running a single chainring. Then a 83mm shell MIGHT be OK.
    mtbtires.com
    The trouble with common sense is it is no longer common

  3. #3
    Fatback
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    Not quite. I have worked on some older model frames that use this, and it's hardly any better than the normal bb. It's only 5mm wider which does not buy you much clearance. I had Phil make a special width spindle to make the bike usable.
    Speedway Cycles owner http://fatbackbikes.com

  4. #4
    mtbr member
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    The 83 mm shell on my old Wildfire barely allowed enough chain clearance for 3.0" Nokian tires.

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