My dad's stock 2006 explorer with 180k just blew another transmission, and he is finally giving up on it. He has brand new tires on the standard 17" rims, and I'm considering taking his wheels and tires and swapping with mine as I need new tires. I have a 2007 Ironman explorer with the Ironman 18" rims but they are fairly pitted from poor maintenance of the previous owner so I'm not losing much "look" by downgrading to the smaller wheels. It seems that these years use the same tpms sensors and the overall tire heights should be close enough to not mess up my speedo more than 2%. Can anyone think of any issues I could run into by switching his 17s with my 18s before he scraps his truck for cheap? We would at least be getting use out of the nearly 1k that new tires cost! Thanks in advance!