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Thread: Chainring shape

  1. #1
    NadaKid wayne pattee's Avatar
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    Chainring shape

    The 52 tooth chain ring is a little bit out of round. There isn't any bind in the chainring bolts but its off a little. Is that ok or should I replace it?

  2. #2
    Senior Member SweetLou's Avatar
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    Was it made that way? There are some oval chainrings, like the Shimano Biopace.

  3. #3
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    Out of round as in "up and down" or "side to side?" I assume you mean it's a bit oval. I don't see how that could happen unless it is in fact a Biopace like Sweetlou says.

  4. #4
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    If it's not Biopace maybe the bottom bracket spindle is bent?

  5. #5
    NadaKid wayne pattee's Avatar
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    Yes it is a biopace. They are made that way huh?
    OK I feel better now
    Thanks for the info

  6. #6
    Senior Member SweetLou's Avatar
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    There are others besides Biopace. Biopace is the most common one seen though.
    Read up on them: http://www.sheldonbrown.com/biopace.html

  7. #7
    rebmeM roineS JanMM's Avatar
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    Used to have a Sugino Cycloid ring.

  8. #8
    NadaKid wayne pattee's Avatar
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    should have known to search Sheldon's site.
    I have much to learn and many dumb questions to be answered.
    Thanks again

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