Why we picked it

Low tire pressure is a gauge check away from a problem: this compact compressor plugs into your 12V outlet, reads pressure digitally and tops off tires anywhere, from the driveway to the roadside. The trunk essential that pays for itself the first time the TPMS light comes on far from a gas station.

Highlights

• Digital gauge with automatic shut-off at target pressure
• Runs on 12V car power, no batteries to charge
• Up to 160 PSI for tires, bikes and sports gear
• Compact enough to live in the trunk year-round