* 205/75R15: This was a very common size.
* 215/75R15: Also frequently used.
* 30x9.50R15: This was a more common size for models with off-road packages. (Note that this is a metric equivalent to a slightly different size than the 205/75R15 or 215/75R15)
To know the *exact* factory tire size for a specific 1992 Jeep Wrangler, you need to check the following:
* The sticker on the driver's side doorjamb: This sticker usually lists the recommended tire size and inflation pressure.
* The owner's manual: This will also specify the factory-recommended tire sizes.
Without knowing the specific trim level and options of your 1992 Wrangler, it's impossible to give a definitive answer.
