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  1. #1
    Senior Member
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    Threading on hubs?

    Hi
    I tried searching the forums but didn't end up finding what I was looking for.
    I have a 2010 Motobecane Track, currently set up FG. The hub is a flipflop hub and I want to try a freewheel cog, and I know there are different thread patterns. How do I know which thread pattern I have? Is it just a matter of counting TPI or are the ridges higher on some thread patterns than others?
    Thanks in advance,
    Aaron

  2. #2
    Ride for Life wearyourtruth's Avatar
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    notice on the left side there are 2 thread sizes. the right side has one thread size.

    the left side is for fixed. the lockring is a smaller diameter and reverse-threaded. the right side is for a freewheel, which just threads straight on.
    before posting, a "noob" should always ask themselves "could this have been answered by first visiting Sheldon Brown

    -Tim-
    www.velocipedebikeproject.org

  3. #3
    Painfully average. calv's Avatar
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    I'm not quite sure but didn't I read in some other thread just last week that you can also fit a freewheel on the fixed side?
    Quote Originally Posted by ThisJauntyGent View Post
    The stories about the smell are absolutely true: straight elephant dick.
    All City Mr Pink

  4. #4
    Senior Member Steev's Avatar
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    The most common by far is ISO, 1.375"x24TPI. It will be what's on your hub.

  5. #5
    THE STUFFED Leukybear's Avatar
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    Get a fixed/ fixed hub; you can mount a cog or freewheel on both sides; which you can't do with a flip flop hub.

  6. #6
    Senior Member hamish5178's Avatar
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    Quote Originally Posted by calv View Post
    I'm not quite sure but didn't I read in some other thread just last week that you can also fit a freewheel on the fixed side?
    Yes.
    Quote Originally Posted by hairnet View Post
    It's a fixie, reasonablility was never a factor.
    My poser bike

    my non-poser bike?

  7. #7
    Constant tinkerer FastJake's Avatar
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    Quote Originally Posted by Steev View Post
    The most common by far is ISO, 1.375"x24TPI. It will be what's on your hub.
    +1

    You can mount a freewheel on either side of your hub. But you can only put a fixed cog on the fixed side because that's the side that has provisions for a lockring.
    Why "derailer" is the correct way to spell the gear-change mechanism: sheldonbrown.com/derailer.html

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