21" OEM Continentals......I looked in the spare well, I have a bunch of Noico left over from my stereo install, I'm gonna line the well with that and maybe pull some rear panels and see whats up.
Weird....this thing is very loud to me. Lots of wind/road/tinny sounding noise. Caddy we just traded was much quieter, not even close to my f150 or my daughters Escape. My truck has a bunch of Noico installed because of my stereo I installed. I do have the pano roof, but it all seems to be coming from the rear of vehicle.