Finding the size of tires that your car came with from the factory is easy.
Open the driver’s door, you will see a factory sticker on the door post. This sticker will have the factory tire information….the size of tires, speed rating and the recommended tire pressure.
When your car came from the factory, many of the computer settings and the speedometer calibration were set for the size tire listed on the door. It is best to follow these tire recommendations if you can.