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  1. #1
    Senior Member DDYTDY's Avatar
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    Spoke stretch and rounding down?

    Hi all,

    I'm going to build a front wheel using an American Classic Micro and a Sun M17A 28h tubular rim radially laced with DT Revolution 1.8-1.5-1.8mm (15/17/15 gauge) spokes.

    Spokecalc gave me 292mm spokes but I'm afraid that they are so thin they'll stretch and I'll run out of thread.

    Should I get 290's?

    Thanks,
    Ray

  2. #2
    In beaurocratic limbo urbanknight's Avatar
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    My understanding is that spokes don't actually stretch (just tension), but did it give you 292 or was there a decimal?

  3. #3
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    Quote Originally Posted by urbanknight View Post
    My understanding is that spokes don't actually stretch (just tension), but did it give you 292 or was there a decimal?
    Spokes follow the various laws of physics just like anything else. Yes . . . they stretch proportionally with the amount of tension applied by tightening.

    How much they stretch?? Never calculated it . . . it probably is not worth worrying about when calculating spoke length.

    DON
    Last edited by dwood; 01-19-08 at 05:35 PM.
    The older I get the less future there is to worry about!

  4. #4
    Senior Member DDYTDY's Avatar
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    Spokecalc gave me 292.1

    Butted spokes will stretch more then unbutted.........

    The really thin 15/17 gauge Revolutions will stretch more then 14g strait spokes.

    How much is too much?

    I don't want to buy a box of 72 to find out I bought wrong. I can't find any spoke suppliers that will sell under a box on the 1.8/1.5's


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