my offroad trailer has been running 80 series wheels with some old 315s I got a while back. They've worked good but are just a touch too big in the fenders. 99% of the time they are fine but a big hit will knock them into the fenders. the last thing I want is to shred a trailer tire while bombing down a road in the Swell or something like that.
When I got the new 33x12.50s on the Tacoma I had my full set of 33x10.50s that I took off of it. I kept one as a spare for the Tacoma but still had the other 3. So I got a couple old school 4Runner rims from Ricsrx that i could use with the 33x10.50s. This gave me a little more room in the fenders on the trailer so I don't worry about bottoming them out. I had one other matching wheel already so it gives me a spare for the trailer now, and essentially 3 more tires that could be used in a pinch as spare on the Tacoma. I painted up the 4Runner wheels last night since they were pretty hammered. turned out ok.
My trailer before with the 35's
crappy phone pic of the 'new' 4Runner wheels after they were painted and on the trailer. Little more room.