All Spalding basketballs come with a printed inflation guide located around the inflation valve to help ensure optimal performance and longevity. This guide clearly indicates the recommended pressure in pounds per square inch (pSi), which typically ranges between 7 and 9 pSi depending on the ball type. It’s important not to exceed this range, as over-inflation can damage the ball and affect gameplay. For reference, 1 pSi is equal to 6.9 kilopascals (kPa). Always use a reliable pressure gauge when inflating your basketball to get the best bounce and feel on court.