* 245/75R16: This was a very common size.
* 255/75R17: This was also frequently found, particularly on higher trims or optional packages.
To know for *certain* what size tires your specific 2009 Jeep Wrangler came with, you should:
* Check the sticker on the driver's side doorjamb: This sticker lists the recommended tire size and inflation pressure.
* Look at the sidewall of your current tires: If you still have the original tires, the size will be printed on the sidewall.
* Check your owner's manual: The owner's manual should specify the factory tire size.
Don't rely solely on online searches as the answer varies by model and options. Always confirm with your vehicle's documentation.