My Patriot is supposed to have P205/70 R16 tires, but for some reason previous owner put on P205/60 R16s, which according to my research are a full 2 inches less in diameter than stock. Aside from the speedometer being off a few percent, there haven’t been any issues.
Within limits, you can use the JScan app to modify what tire size the Patriot thinks is installed. My tires are outside the pickable diameter range offered by JScan - I was able to get the difference down to 1 inch diameter, but again, no issues.