So my dad just bought a Dodge Journey which came with steel wheels and hub caps. He wants to get different wheels and I found him a set of 2010 Jeep Wrangler 18" wheels but the tire that comes on them is 255 wide while the stock tire on the Journey is 225. 2 questions about this. First is how wide do you think he can safely go on that car? Second is how skinny of a tire can I safely put on a wheel designed for a 255 section tire? Even the 19" wheel package that you can get on the Journey is a 225 section tire so I was thinking 235 would be safe, 245 might be pushing it and 255 would be out of the question but I am not really a wheel guy so I do not really know. I also would think you could put a 245 section tire on the Jeep wheel since its not THAT big of a difference but if you could do 235 it would be even better. However, that skinny might start to look weird on the wheel, again, I am not sure. Any input would be appreciated. I am trying to get these as a birthday gift so I can't just go test fit them on the car unless I want to give it away, that is the last option. THANKS
EDIT: I see a lot of people putting bigger tires on the Journey, would the tires that come on a Jeep (255/70 R18) fit on the Journey without rubbing? Also, is it possible to adjust the speedo to read correct with the larger tires?