I have a 37” Goodyear MT (old school military OZ tire). 37x12.5x16.5 mounted on a Humvee 8 bolt wheel (no run flat or pvc beadlock inside). The rim was recentered before I got it with a flat plate weld in center with 8on6.5. I wouldn’t use this for anything more than a spare tire to get you back to your trailer.
It has about 1/4” tread. I had this to carry as a spare tire before I had a full-size spare (I was running 39” IROKs at the time).
Free for anyone that can use it.