Medium weight tennis rackets are a better fit for intermediate and advanced players. These rackets normally weigh between 10.5 and 11.5 ounces (or 285 and 325 grams). They provide a nice balance between power and control, and offer decent maneuverability.
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As the name implies, strung weight is the weight of a tennis racquet with tennis strings installed. This weight is measured by placing a strung racquet on a scale to calculate its weight. For reference, tennis strings will generally add roughly 15 -20 grams or a little over a half-ounce to a racquet’s static weight.
When you see that a racket has a swing weight of 330 RDC, this means that this is the number that the machine determined for the particular racket’s swing weight. This is not to be confused with grams. Grams are commonly used to measure the static weight of a racket, and these numbers can be very close to each other.
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The difficulty in analysing SW, as with all racket variables, is unless you own a racket shop and hitting wall you can’t ever really check whether the differences in feel and performance are due to SW, static weight, balance, polarization, flex, string type, tensions or vibration frequency, to name just a few.