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The tire size for the 2004 Kia Optima varies based on the engine. For the Ex and LX models with the 2.4 L 4-cylinder engine, a P205/60R15 tire is used on a 15-inch diameter, 6-inch width wheel. The 2.7 L V6 Ex and LX models use a P205/55R16 tire on 16-inch diameter, 6-inch width rims. All models should maintain a tire pressure between 34 to 35 psi. The Optima is equipped with a Tire Pressure Monitoring System (TPMS) that will illuminate the TPMS light on the dashboard when tire pressures drop slightly below the recommended level. By keeping the proper tire pressure, you can extend the lifespan of your tires and ensure even wear.
The 2004 Kia Optima offers 2 different versions and has 2 sets of tire sizes to choose from. It's recommended to keep the tire pressure at 30 psi. The wheel size is 15 inches, and the standard tire size for both the front and rear is P205/60R15 on the 2004 Kia Optima.