A portable tire pump
This portable emergency air compressor can save you the trouble of having to deal with the often-broken coin-operated machines at the gas station. Connect the wire to your car's 12V outlet and attach the hose nozzle to your tire valve to inflate most standard tires. You can set it to the tire pressure you need and it'll automatically shut off when you reach it to quell risk of over-inflation. The LED screen can also come in handy if you're ever using this in the dark. Simply enter the desired tire pressure and let it work!
Great for preventative road trouble, too, it has a digital tire gauge so you'll always know if you need to top off before a road trip.
$27.19 AT AMAZON (REGULARLY $32.98)
