* Model Year: Tire sizes changed over the years the Ranger was produced.
* Trim Level: Higher trim levels sometimes came with different tire sizes.
* Options: Certain options packages might have specified different tires.
To find the original tire size for *your* specific Ford Ranger 4x4, you should:
* Check the sticker on the driver's side doorjamb: This sticker usually lists the recommended tire size and inflation pressure.
* Look at your owner's manual: This will also specify the original tire size.
* Check the tire itself (if still original): The size is printed on the sidewall of the tire. It will be a code like "LT245/75R16" or similar.
Without knowing the specific year and model of your Ranger, it's impossible to provide a definitive answer.
