What size of tires to replace 235/55/15?

I am trying to find tires for our Ford Freestar. We had trouble finding them last time. There are currently 235/55/15. What other size could I go to that is more available. Specifically from Discount Tire and Walmart? Thanks.|||245/55 = 10mm wider





225/55 = 10mm narrower





OR





235/60 = 5mm taller





You can run 245/55 10mm wider will be better.|||If you are willing to replace the rims with a larger size, I would recommend a wider tire and a smaller aspect ratio. Maybe a 255/50/20 would be better. They are a little wider for better handling. The rims may look better and the aspect ratio is smaller so you get a little better handling and performance. I hope this helps!!|||There should be a placard on the inside of the glove box showing the recommended tire size and inflation information. If it is not there, look on the front door pillars. Regarding tire shops...don't go to wal-mart. They are dangerous because of the inept people they let work on your car. Discount tire is reputable and has excellent deals.