Checking the tire pressure should be a normal habit for all car owners. If the tires strain is too high or too low it can influence how the car breaks as well as the fuel intake. Both things can be influenced by it although many might not be aware of this. The issue comes when the strain is too low and the wheels need to be inflated a little bit. Not everyone has a car service near which may check the strain. In addition, it doesn't seem like it would be worth it to waste the opportunity to go to a car service just to inspect the pressure. A good alternative is to get a cheap tire inflator . Most of them come with a pressure gauge and a number of them can also be powered from the car's lighter. These simple devices are extremely small and may be saved in the back without requiring much space. Some models are a bit bigger and take a wall plug to be powered but for the most part, they all are powerful enough. Kensun YS-205 (Home 110V)/ DC (12V Car) Portable Air Compressor Tire