Ashaway 100% Zyex monofilament

Discussion in 'Strings' started by corners, Feb 22, 2012.

  1. Shroud

    Shroud Hall of Fame

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    2 things:

    1. Not nearly enough time to have it fully stretch
    2. The mains limit the stretching.

    I'll do it manually with my body weight for 2-5 minutes, and then with the stringer pulling 25% higher using the prestretch function. And waiting to clamp.

    You can get a ft or more permanent stretch on zx if you do it right....
     
  2. elkwood

    elkwood Rookie

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    Seems like over kill for the poor string. It needs a certain amount of elasticity i would think. Pre stretching it then pulling it with a 25% over pull most make it cry uncle !!
     
  3. Shroud

    Shroud Hall of Fame

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    yeah there are some posters I see here that I respect that are in the school of wanting the string to be elastic. Unorthodoxstring comes to mind as one in that camp.

    In this instance think of WHY the prestretch. Its for tension maintenance. That elasticity you mention eventually ends up as tension loss. ZX has a huge initial loss but then is super stable. Prestretching minimizes tension loss. Its one reason the kev/zx string bed can last soooo long and play unchanged. But you dont get there unless you prestretch.

    FWIW I stretched the zx today with my manual method and managed to get 16inches of permanent elongation in 2 min of pulling. Think of the kind of tension loss that represents, and this is why I am hassling poor Drak :)

    Also I love a dead string bed and this probably helps. And FWIW zx is still elastic after I stretch the crap out of it....
     
  4. drak

    drak Professional

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    LOL, if that was "hassling" I got off easy! I get what you are saying but am happy with the tension I end up with per the method I use
     
  5. Shroud

    Shroud Hall of Fame

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    All that matters!!!

    Though are you happy with how long it lasts??
     
  6. racket king

    racket king Rookie

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    That's only 3.4% of elongation.

    16" = 40.64cm

    40.64cm / 1200cm packet = 3.4% elongation.

    That's less than pulling the string to tension.

    Unless you're talking about a half set?

    I experimented by pulling an unimpeded main to 60lbs reference and got a 6% elongation. Another pull of the same piece resulted in a another 2-3% (8-9% total). After 10 mins of resting the string, it only shrunk back by 1% giving a total of ~8% elongation.

    Mimicking a machine prestretch (ie tension overshoot) of 10% at a reference of 60lbs, I get 8% in total elongation.

    It would be a lot simpler if they produced a lower powered or pre-stretched version from factory....
     
    Last edited: Jun 21, 2015
  7. Shroud

    Shroud Hall of Fame

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    Amen to that!!! But Julian said no

    It's a half set. Only use zx as a cross.

    If those numbers are right it's scary because no one is doing zx at 60lbs. I am but that's just because of a recent switch to a 110"

    Was this on a crank or cp?
     
  8. racket king

    racket king Rookie

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    That's on a crank - I do poly / ZX at 58/60.

    On a constant pull, I do 53/55.

    How are you pre-stretching yours? Can you describe the method?
     
  9. Shroud

    Shroud Hall of Fame

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    Here is a link where I detail it:

    http://tt.tennis-warehouse.com/showthread.php?t=516705&highlight=Prestretch

    It could be better. But think about the tension loss over a 1ft of elongation produces. Broken crosses are a few inches at best and you see what it does
     
  10. Ramon

    Ramon Hall of Fame

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    I was doing ZX at 66 lbs when I was playing with a 16x16 ESP racquet, and I was using ZX in the mains. It holds tension great even at that tension. I used a drop weight machine with a ratchet, holding it for at least 30 seconds for each pull with no pre-stretch. I used 16g natural color. I tried the red color but it broke more often than not.
     
  11. Shroud

    Shroud Hall of Fame

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    Cool. The package says don't go above 60 so I figured people would stop there

    Now I can go higher!!

    Thanks
     
  12. racket king

    racket king Rookie

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    All that stuff sounds like a lot of trouble, especially having to build a weights and pulley device!

    I haven't tried it, but surely, it would be simpler to twice pull the string being tensioned or alternatively get a old 18x20 type racket and use that to stretch a half set of the strings (avoid weaving them in that racket). With the 2nd option, you could just leave it in the racket for a day or so and take it out for restringing when needed.
     
  13. ricardo

    ricardo Professional

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    I tried this.

    I strung a racket (just the mains) at my regular tension (50 lbs).
    Left it clamped on the stringer for 24 hours.

    Result
    No permanent elongation.

    I measured the permanent elongation after 24 hours.
    Not even an inch.

    I waited 24 hours to measure permanent elongation because
    as soon as you remove a string from a load, it will shrink.
    A string is elastic. It will attempt to return to its original lenght.
     
  14. Nostradamus

    Nostradamus G.O.A.T.

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    In the future
    how does it compare to X-1 biphase or Babolat Origin in Power and control ?
     
  15. Shroud

    Shroud Hall of Fame

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    No pulley here. Just a dowl rod. I have an electric so I would avoid the 2nd option
     
  16. racket king

    racket king Rookie

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    Has anyone else noticed that the reel price of this string makes no sense?

    It costs as much, if not more, to buy a reel than a load of individual sets.
     
  17. Shroud

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    Yep!

    I bought like 10 sets at the sale price because you could get more string that way for less.
     
  18. comeback

    comeback Professional

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    I think you save more with a reel because you can cut much less(due to stretching) than buying an individual package which wastes much more. ie: I only use 12 ft 8 inches for my crosses
     

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