Operating Range 6-30 PSI Airdown from street pressures to as low as 6 PSI or as high as 30 PSI. | Operating Range15-55 PSI Airdown from street pressures to as low as 15 PSI or as high as 55 PSI. | Operating Range 1-10 PSI Airdown from street pressures to as low as 1 PSI or as high as 10 PSI. |