A tire pressure gauge is an affordable and easy to use tool that can prevent a flat tire or worse. Tires that are improperly inflated can cause blowouts that lead to accidents. They can also find you stranded on the side of the road. Additionally, the wrong level of inflation affects your fuel efficiency. It’s important to check them regularly and also be aware that the right tire pressure changes based on the outside temperature. Check with the tire manufacturer for the right pressure.