How do i pre-stretch my tennis string?

Discussion in 'Stringing Techniques / Stringing Machines' started by Francis27, Oct 18, 2012.

  1. Francis27

    Francis27 Semi-Pro

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    Hi i want to prestretch Babolat rpm team because it looses tension pretty quick but how do i do it without breaking the string? I saw a video with one using a clamp but i dont have the floating ones i only haved fixed that comes with my stringer.
     
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  2. fusion91

    fusion91 New User

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    I pre-stretch my polys similar to how YULitle's video demonstrates, except that I use a bedpost or table leg -- something heavy and fairly big in diameter to pull against -- instead of a post like in the video.
     
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  3. fortun8son

    fortun8son Hall of Fame

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    The prestretch you saw was probably related to natural gut.
    That kind of prestretch won't do a thing for poly.
    The prestretch that an electronic machine does is a 5%-10% overshoot on each pull that will, most likely, just kill your string before you even get to play.
    RPM Team already has better tension maintenance than Blast.
    If you want better tension maintenance, look elsewhere.
    Prestretching is not the solution.

    BTW a starting clamp is a tool that every stringer should have in their kit.
     
    Last edited: Oct 18, 2012
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  4. cluckcluck

    cluckcluck Hall of Fame

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    If you prestretch your RPM (or any other poly for that matter), you're killing the string. Polys are meant to have elasticity, so they can snap back into place. By pulling them beyond the point of elasticity, you're taking away the snapback potential, thus resulting in a dead string.
     
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  5. pvaudio

    pvaudio Legend

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    I find this interesting because I find it to be true in practice, but yet Kirschbaum says their poly strings are prestretched and they never feel dead.
     
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  6. cluckcluck

    cluckcluck Hall of Fame

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    You have a very good point. Though do they say how much they pre-stretch? If they only pull to even out the string a little (maybe 5%) then I wouldn't see any harm. But if they really stretch the string, by leaning back until there is no coil I think it's too far.
    Personally, I don't pre-stretch and I don't string at high tensions.
     
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