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  1. #1
    mtbr member
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    Bike fit sizing in between go up or down?

    Hi some of the bike fit calculator have me on a 18 frame other on a 19.
    the frame im looking at comes in 15, 17 and 19.
    Diamondback Bicycles - Sortie Black Frameset
    this frames seem to run big or is just me top tube length.

    Just wondering what is the general guide to go up or down?
    Thanks!

    ps: I usually type height 70.8" and 33'' inseam no shoes, book to crotch method

  2. #2
    Picture Unrelated
    Reputation: zebrahum's Avatar
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    Jun 2005
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    Try them both and pick the one you like best. Any other method is a guess at best.
    Don't you hate it when a sentence doesn't end the way you think it octopus?

  3. #3
    mtbr member
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    It depends. Not all frames marked as a 18 or 19 have the same dimensions. Best thing to do is actually get out and ride a few.

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