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  1. #1
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    Question Real string gauge

    Ever look at your new string and think that even if it's the same gauge (or even string) it looks bigger?

    I first tough it maybe an optical effect because of the difference in color or material.

    WRONG!

    Weeks ago I bought a micrometer, and since then I measure the real gauge before and after stringing.

    Heres my findings:

    Original Gauge (average)
    Measured every 24 inches (on 33 feet)

    BG80 - .680 mm
    BG66 - .675 mm
    BG65 - .740 mm
    BG 68Ti - .700 mm
    Gosen Pro 66 - .680 mm
    Gosen 68 - .700 mm
    MicroPower - .700 mm
    Rally 21 - .750 mm

    Stringed gauge (average same 4 main and same 4 cross) - Same racket model at 24x26 lbs

    BG80 - .670 mm
    BG66 - .635 mm
    BG65 - .720 mm
    BG 68Ti - .660 mm
    Gosen Pro 66 - .650 mm
    Gosen 68 - .680 mm
    MicroPower - .660 mm

    Did anyone experience the same thing?

  2. #2
    Moderator drifit's Avatar
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    never measure them.....
    need master NGP advice........

  3. #3
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    hm... interesting experiment... it's weird because, bg 66, bg 68Ti and MP have a -0.04 mm when they're strung... it's a big deviation from the unstrung diameters...

    anyhow, can't believe that bg 66 is 0.675mm...

  4. #4
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    Hi M,

    Very good work.

    OK, here is the story. The gauge is measued under a average user condition. ie. a string that is under tension of 16~18lb and not on the racquet. So Please secure one end of the string to a wall (or door handle). Strech out and tension the string at the other end at ~17 lb. Repeat the same measurement as you did for unstrung string. You should get a closer measurement.

  5. #5
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    silentheart, do you know what does yonex and ashaway use in their measurements? is it 16~18lbs as you have said? do they have a standard in doing this?.. thanks..

  6. #6
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    Yonex sample the gauge during the production. It was sampled during the transfer from the machine to the "BIG" spool with laser. I had to guess the tension during that transfer about 16~18 lb. There is a small error allowed (+/- 0.003 mm) I am not sure how Ashaway QC and measure the gauge.

  7. #7
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    ok... thanks silent for explaining and clarifying....

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