Chainring question

Discussion in 'Cycling Equipment' started by guzekre, Sep 6, 2004.

  1. guzekre

    guzekre New Member

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    I have a FSA gossamer double on my cross bike. Due to stupidities on my part, I screwed up my inner chainring. I was wondering if I could replace the chainring with a Shimano 105 or comparable? I mean aren't we only concerned about the five bolt pattern? Does the width of the ring vary or is it standard?

    Thnx :confused:
     
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  2. e_guevara

    e_guevara New Member

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    I'm not familiar with the FSA cranks, but check the bolt circle diameter (BCD) with the Shimano chainrings, or else the mounting bolts may not line up properly. No need to worry about the thickness (width) of the chainring.
     
  3. guzekre

    guzekre New Member

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    Thanks alot for the tid bit. Doing some quick research they both match up (130mm). I was wondering if the number of teeth makes a difference as well?
     
  4. e_guevara

    e_guevara New Member

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    Nope, it does not. :D
     
  5. guzekre

    guzekre New Member

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    sweet, thnx alot.
     
  6. need11@46

    [email protected] New Member

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    It certainly does if you want to retain the same gear ratios.
     
  7. e_guevara

    e_guevara New Member

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    The answer was pertaining to installation issues.

    The number of teeth do aid in gear development. There are however redundant ratios, depending on the chainring/sprocket combination. See Sheldon Brown's page about gear ratios and gear development for more info.
     
  8. guzekre

    guzekre New Member

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    So like what if my only concern was getting my bike back together again, so that I could ride it. Would having a crank with different number of teeth effect my performance, like causing crappy shifting or causing my chain to skip?
     
  9. e_guevara

    e_guevara New Member

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    Double chainrings come in combinations of 52 or 53 for the biggest ring and 42 or 39 for the smaller ring. I see no reason for the chain to skip or the shifting to be crappy if the ring was installed properly.
     
  10. guzekre

    guzekre New Member

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    For some reason my double is a 38/48. I double checked this by counting the teeth myself. So if I was to swap this 38 with a 39 that would be ok right? Sorry to beat this to death
     
  11. e_guevara

    e_guevara New Member

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    Yes. I see no reason for it not to.
     
  12. need11@46

    [email protected] New Member

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    Perhaps, but your original response was incomplete. This response provides a complete and accurate answer to the entire matter. Thanks.
     
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