ARB Small Dial Tire Gauge (PSI/Bar, ARB506)

The ARB506 is a small-dial mechanical tire gauge that reads 0-70 PSI with a matching bar scale. The movement is a brass bourdon tube with geared internals, so the needle holds true across temperature, humidity, and altitude swings that push cheap pencil and digital gauges off. The dial sits behind a protective rubber guard that takes the drops and rolls that come with a tool living in a door pocket.

The real work happens when you air down. A flexible hose ends in a dual-angle chuck that seats on straight and angled valve stems, and an integrated bleed button lets out air while the needle reads live. You hold the chuck on, thumb the button, watch the pressure fall to your trail number, and let go. No pulling the chuck to re-check, no overshooting and topping back up. The low end of the dial is geared for the single-digit pressures you run in sand, rock, and snow.

It carries ARB's 3-year warranty and runs $34.95.