Prestretch your multifilament strings before stringing is a good idea when using a crank style tennis racket stringing machine.

If you are using a manual 'crank style' tennis racket stringing machine you might benefit from prestretching your multifilament tennis strings before installation. I was having a conversation today with a tennis player that strings his own rackets on a table top crank stringing machine and had installed Wilson NXT tennis strings. His initial reaction to using NXT was he liked the feel for about two weeks and than it 'loosened' up to much for him.

My thoughts regarding this tend to follow the idea of prestretching the string prior to installation. The pre-stretching will first of all make it easier to string because you are taking some of the coil recall out of the string and it will take some of the elasticity out of the string which ultimately will help it keep tension a little longer once installed.

A constant pull computerized machine will keep the string taught while you are clamping off and will take out the excess slack but this is not the case with a crank manual machine and therefore the strings might in fact lose tension quicker. another idea is to add 3 pounds to the desired tension to compensate. Let me know what you think!

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