What Is the PSI of a Regulation NBA Basketball? A regulation NBA basketball must contain between 7 1/2 and 8 1/2 pounds of pressure per square inch, or PSI. The ball also must exhibit an official NBA approval mark. At the beginning of an NBA game, each team must have access to six balls during the warm-up period.
A regulation basketball used in NBA play is inflated to an air pressure between 7.5 and 8.5 pounds of pressure per square inch. Many balls are inflated to the average pressure of 8 pounds. Regulating a basketball's air pressure ensures fair playing conditions throughout a league. A ball's internal air pressure determines the height of its bounce.
Size: Radius: Weight: PSI: Used By: Size 7: 29.5″ 22 oz: 7.5 to 8.5: This is the official size for the NBA and men’s college and high school basketball leagues.
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So far the official information states that a NBA basketball should always be inflated to a maximum pressure of 7.5 to 8.5 PSI. The WNBA follows the same rules. The NCAA inflation requirements are handled differently since they are by given weight.
To begin with, the NBA basketball is produced by Spalding, and the official size for men’s tournaments has to be 29.5 inches in circumference. With a weight of 22 oz., the ball can be inflated with a pressure range of 7.5 to 8.5 psi. These balls are made up of orange leather having black lettering, and are of size 7.
For a 29.5″ basketball (mens) and a 28.5″ basketball (womens), the recommended air pressure range is 7 - 9 PSI. The irony is almost no one has a gauge to accurately check the PSI rating on a basketball while inflating it because most pumps aren’t equipped with a gauge and ones that are rarely give an accurate reading.
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