Kia Optima: Tires and wheels / Tire pressure

Always observe the following:

• Check tire pressure when the tires are cold. (After vehicle has been parked for at least three hours or hasn't been driven more than 1.6 km (1 mile) since startup.)
• Check the pressure of your spare tire each time you check the pressure of other tires.
• Never overload your vehicle. Be careful not to overload a vehicle luggage rack if your vehicle is equipped with one.
• Warm tires normally exceed recommended cold tire pressures by 28 to 41 kPa (4 to 6 psi). Do not release air from warm tires to adjust the pressure or the tires will be underinflated.

WARNING - Tire Inflation

Overinflation or underinflation can reduce tire life, adversely affect vehicle handling, and lead to sudden tire failure. This could result in loss of vehicle control and potential injury.