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Q & A: Tennis ball pressure

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Most recent answer: 01/04/2008
Do the standard tennis balls of all tennis brands have the same amount of air pressure inside their tennis balls?
- Mira
Walnut, CA, US
No.  The USTA regulations only specify the pressure for special "pressure-less"balls, which use more rigid skins rather than air pressure. The rules say that that type of ball must have less than or equal to 1 psi (7 kPa) pressure (above atmospheric pressure).  There are a number of other rules, for example, a ball dropped from a height of 100 inches must rebound between 53 and 58 inches, which apply to all tennis balls. 

For all the gory details see Appendix I at the USTA site:

LeeH (mods by mbw)

(published on 01/04/2008)

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