What PSI range do I need for cars, trucks, and motorcycles?

Most passenger cars run 30-40 PSI, so a 0-75 or 0-100 PSI gauge is plenty. Trucks, RVs, and high-pressure applications can exceed 100 PSI, where a 0-150, 0-200, or 0-230 PSI gauge is appropriate. Buying a much higher range than you need can slightly reduce resolution at low pressures, so match the gauge to your typical use.