Recommended tire sizes for the 2006 Chrysler PT Cruiser vary by model. For the Convertible base model, Wagon base model and Wagon Touring model, the recommended size is 195/65/R15. Recommended tire sizes for the other 2006 PT Cruiser models are listed on Tire-Size-Conversion.com, as of 2015.
Find recommended tire sizes for all 2006 Chrysler PT Cruiser models on Tire-Size-Conversion.com by selecting "Chrysler" in the Make menu, "2006" in the Year menu, "PT Cruiser" in the Model menu, selecting an option and then clicking Find Tires. The website displays the recommended tire size, an alternate recommended size and links to purchase tires of those sizes.