Oldcarlover

Last year I purchased an 06 ls430. I saw the wheel size increase from 15 to 17 from my old 95 LS400. I was not real happy. I purchased the car with new tires. Now i have crappy wear and flat after 20K miles and the tire cannot be repaired. Low profile tires are not cheap! Is there a problem going back to a 15' wheel? I can't see any but you never know with these new cars.