The car currently has tires on it that are biased ply and have tubes in them. They are 6.50 x 16 and from Montgomery Ward. I had one tire place tell me that the DOT wouldn’t allow them to put tubes in tires anymore. I have plenty of room to put larger rims and tires on the front wheels but the rear wheels don’t have a lot of space so I’m trying to stick to original size. It’s literally driving me nuts I spend too much of my spare time looking for answers. I called tire rack And they can’t help me at all. I’ve been to Discount tire and they keep telling me I can put larger rims and tires on the car because there’s room but then they tell me I need to drive the car there to make sure I know this car better than they do . . .