Finally have bcd

Discussion in 'General Bike Discussion' started by markmay, Jan 26, 2010.

  1. markmay

    markmay New Member

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    Thanks to ya'll so far. Someone taught me BCD. Now I can continue the quest for a 53 tooth chain ring with an 85 mm bcd Shoot me a message if you can help.
     
  2. hophead

    hophead New Member Tavern Member

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    Are you sure that's your BCD and not just the distance on center of the holes? Never heard of an 85mm BCD. Seems kind of small for a 53t chainring. If the holes are 85mm on center, it's a 144mm BCD.
    [​IMG]
     

  3. Industry_Hack

    Industry_Hack Total noob (& forum admin) Admin Staff Tavern Member

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  4. hophead

    hophead New Member Tavern Member

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    Who said that it was for a multi geared bike?
     
  5. Industry_Hack

    Industry_Hack Total noob (& forum admin) Admin Staff Tavern Member

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    No one. Perhaps I'm just pointing out the obvious, that it's a track chainring. ;)
     
  6. Grape Ape

    Grape Ape Younger than Hack Tavern Member

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    Thanks for clearing that all up Hop. I thought this was a thread about Bicycling Compulsive Disorder. I guess we are all just plainn crazy, no fancy name for what ails us yet.:p
     
  7. markmay

    markmay New Member

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    Whoa now,

    Not looking for a fight, but someone mailed a diagram and I was using the center of the bolt holes. Starting to make sense now.
     
  8. markmay

    markmay New Member

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    Can you explain "track chainring" I'm looking to replace the big ring on a 2 ring sugino maxy crankset. It's 85 mm center to center on the bolt holes.
     
  9. markmay

    markmay New Member

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    Just a little slow on the uptake. I got this attachment, but didn't pay attention. So, when I measure 85 mm center to center, I am looking at a 144 mm BCD. Thanks for your patience.
     

    Attached Files:

  10. hophead

    hophead New Member Tavern Member

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    Actually, there is no 85mm BCD. 84.6mm center to center = 144mm BCD.
     
  11. markmay

    markmay New Member

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    Hey hophead. Quit pickin' on me. Gotta start somewhere. Most everywhere, close is good enough.
     
  12. hophead

    hophead New Member Tavern Member

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    Sorry. Just sayin'.;)