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  1. #1
    mtbr member
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    Finding bike size?

    Hi

    I have a 90something Trek 930 and Specialized Hard Rock

    How would i find out what size these 2 bikes are? the Specialized is smaller then the Trek for sure.

    I am 5'9 and the Trek just seems too small

  2. #2
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    I assume I am too measure center to center
    This is my results of my 2 bikes

    The Trek seems much bigger then the Specialized but they both are 16's from my measurements?

    References I used for names, not sure if these are what they are typically called.
    http://en.wikipedia.org/wiki/Image:A...ed_bicycle.jpg
    http://en.wikipedia.org/wiki/Groupset

    Trek 930 (Cro-Moly)
    =============
    A) Top Tube - 21
    B) Down Tube - 24
    Ca) Seat Tube - 16
    Cb) Seat Tube welded post - 1.5
    Dx) Stem height - 4
    Ey) Stem Length - 5.5

    W) Derailleur - Altus A10
    X) CrankSet - Altus A10
    Y) Brake Pads - No good labels
    Z) Shifter - Altus A10

    Specialized Sport Hardrock GX (Cro-Moly)
    =============
    A) Top Tube - 21.5
    B) Down Tube - 24
    Ca) Seat Tube - 16
    Cb) Seat Tube welded post - 1
    Dx) Stem height - 5
    Ey) Stem Length - 6

    W) Derailleur - Shimano AceraX
    X) CrankSet - Shimano AceraX
    Y) Brake Pads - Shimano Altus
    Z) Shifter - Shimano? MRX100-71?

  3. #3
    *****************
    Reputation: Bikinfoolferlife's Avatar
    Join Date
    Feb 2004
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    12,378
    Bike sizes are usually expressed via a seat tube measurement; some measure center-top, some center-center. Not sure what you mean by welded post on your seat tube measurments...
    "...the people get the government they deserve..."
    suum quique

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