Kia Optima 2017 Owner's Manual page 740

Specifications & Consumer information
NOTICE
• We recommend that when replacing tires, use the same originally supplied with the vehicles.
If not, that affects driving performance.
• When driving in high altitude grades, it is natural for the atmospheric pressure to decrease.
Therefore, please check the tire pressure and add more air when necessary.
Additionally required tire air pressure per km above sea level: 1.5 psi/km
CAUTION
When replacing tires, use the same size originally supplied with the vehicle.
Using tires of a different size can damage the related parts or make it work irregularly.
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