You’ll still use your stock tire valve to monitor air pressure, and this clip-on liquid-filled gauge is the perfect companion for Monster Valves or Mini Monsters. Like the Powertank itself and the Monster Valves and Mini Monsters, Powertank tire gauges are made in the USA. Our 4Runner uses 40 psi for the street and anywhere between 15 and 30 psi on the trail, so we ordered the 0-to-60-psi version of the gauge. If you use higher street pressure, go for the 0-160 psi version. Either way, the clip-on valve chuck means hands-free use.