What the biggest size tire that can go on a ford 500?

The Ford Five Hundred typically accommodates tires sized up to 235/55R18, depending on the specific model and trim. However, you can fit larger tires, such as 245/50R18, with some modifications, but this may affect handling and ride quality. It's essential to consider the wheel well clearance and the overall diameter to avoid rubbing issues. Always consult with a tire professional or refer to the owner's manual for the best recommendations.