As a car owner, there are helpful habits you can form that will help you save time and money. Keeping a close eye on the air in your tires is one way to extend their life. Tire pressure is a factor in how your tires wear over time. Too little air pressure will cause a deflated tire to wear more along the sides of its tread. Too much pressure will cause an over-inflated tire to bulge and wear more in the middle of its tread. Checking your tire pressures and adjusting them will ensure they wear evenly.