Check your tire pressure, reduce pollution

Checking tire tread and tire pressureAbout 40% of the 5 million cars on Minnesota roads don’t have properly inflated tires. Those cars are spewing out up to 306,000 extra tons of carbon dioxide per year because their tires are under-inflated. These emissions directly contribute to increased greenhouse gases in the atmosphere. Reduce pollution by keeping your tires at the proper pressure.

Want to save 10 cents per gallon?

Keep tires properly inflated. Maintaining proper tire pressure is like saving 10 cents per gallon! Tire health not only saves you up to 3% on fuel but also reduces your car’s tailpipe emissions. Proper pressure will also help your tires last longer and wear evenly—saving you money on tires, too.

Check the "Tire and Loading Information" label on the driver's side door edge or in your owner's manual.

Tips for tire inflation

  • Be sure to measure the inflation pressure of your tires, including your spare, at least once a month. While doing so, take a moment to ensure that the tire is securely fastened to the vehicle.
  • Find the vehicle manufacturer’s recommended pressures for front, rear and spare tires. Recommended pressures are printed on the vehicle’s tire information label, which is usually attached to the edge of the driver’s door, the door post, the glove box or the fuel door, or check your owner’s manual.
  • Don’t use the pressure indicated on the tire. It’s the maximum pressure, not necessarily the recommended one.
  • Use a good-quality gauge to measure the pressure of each tire. The pocket gauges sold by automotive supply stores are generally more accurate than those on gas station air pumps.
  • Measure the pressure when your tires are cold, and don’t forget the spare. Tires will be cold if the vehicle has been stationary for at least three hours or has not been driven more than 1 mile.
  • Remember that tires lose pressure when the air temperature gets colder (about 7 kPa or 1 psi for every 5°C drop in temperature). Tires may also lose a certain amount of pressure due to their permeability (about 14 kPa or 2 psi per month).
  • Over inflation can be a problem too. An overinflated tire rides on just the center portion of the tread. The smaller contact area means reduced grip on the road, leading to a harsh ride, handling issues (steering and stopping problems) and increased wear on tires and suspension components.
  • Rotate your tires according to the vehicle manufacturer’s recommendation, found in the owner’s manual. Or talk to your tire professional. Common practice is to rotate tires once or twice a year.