Will 18"s rims fit an xa, without altering anything. Or should i stick with 17"s[/url]

 

check around, all xA's run 18's, including mine. No modification needed as long as you dont go over 18x8.5

 

i put 18's on my car at first and i hated it. really bad mileage and the ride was pretty terrible. once i swapped to 17's life was great. 18's look better but the right set of 17's can make a huge difference. look for a lower offset and they'll look great.