Folks who know say most of us are running with lower tire pressure than we should. We just don't bother to check our tires often enough.
How does low tire pressure affect vehicle handling? It's not a pretty picture! Low tire pressure adversely affects braking performance. Low pressure also can affect your ability to steer and corner. Remember that all tires lose air over time, and temperature affects the pressure. Do yourself (and your family) a favor and spend five or ten minutes on your tires each week.
Remember: “The colder the weather, the lower the pressure in your tires.” Be sure to check them once every week. Another benefit from having properly inflated tires is the improvement in gas mileage.