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  1. #1
    Senior Member Drummerboy1975's Avatar
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    How does Cannondale measure their frames?

    Do they measure from the top, middle, or bottom or the BB? Then where to?

  2. #2
    Senior Member tugrul's Avatar
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    I think the 80s ones were from center of the BB to top of the seat tube, including the extension.
    Looking for Quick release for a BR-6208 Cotter pin press

  3. #3
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    My '91 3.0 frame is a "56cm" and measures 56 from the center of the BB to the top of the seat post. Center to center is approx 54cm

  4. #4
    Senior Member Drummerboy1975's Avatar
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    Ok, thanks guys.

  5. #5
    Senior Member Roger M's Avatar
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    I have a 1987 R500(63cm). It measures 66cm from center of BB to top of seat tube.

    From top of BB to top of seat tube is 63cm... if that means anything

  6. #6
    Senior Member Drummerboy1975's Avatar
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    Hmmm... Interesting.

  7. #7
    Senior Member Roger M's Avatar
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    Quote Originally Posted by Drummerboy1975 View Post
    Hmmm... Interesting.
    So what is the measurement on your bike?

    Here is the 87 catalog. The frame sizes are broken down here if you scroll down.

    http://66.147.244.179/~vintagm8/year/1987/1987.pdf
    Last edited by Roger M; 09-29-11 at 02:45 PM.

  8. #8
    Bianchi Goddess Bianchigirll's Avatar
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    they measure by how many beer cans they need to stack up to make the seat tube
    Bianchis '87 Sport SX, '90 Proto, '90 Campione del Fausto Giamondi Specialisma Italiano Mundo, '91 Boarala 'cross, '93 Project 3, '86 Volpe, '97 Ti Megatube, , '90 something Vento 603,

    Others but still loved,; '80 RIGI, '80 Batavus Professional, '87 Cornelo, '09 Motobecane SS, '?? Jane Doe (still on the drawing board), '90ish Haro Escape

  9. #9
    Senior Member Anonymoose's Avatar
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    The serial number contains the size of the frame as well so if you have a frame already see what the size is supposed to be and then see which measurement corresponds with that.

  10. #10
    Senior Member
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    Drummerboy1975, My '89 crit bike is a 56 cm frame and measures 56 cm from the center of the BB spindle to the top of the top tube.

    Brad

    PS My bike is pretty much spot on using the 1990 Cannondale catalog.
    Last edited by bradtx; 09-29-11 at 05:24 PM. Reason: ps

  11. #11
    Senior Member
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    Quote Originally Posted by Bianchigirll View Post
    they measure by how many beer cans they need to stack up to make the seat tube
    Not just any beer can, B'Girl, but aluminum beer cans with the pull off tabs.

    Brad

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