I've got a couple of sets of Michelin XL's & XLZ's. These are fairly aggressive tread patterns. They are on 16" split rims. The rims are not usuable though for civilian vehicles. You could weld a center in these things extremely easily though & use the outer ring as a rock guard. Or you could fabricate an adapter plate fairly easily if you even wanted to use these rims. The tires are 38" tall and 11" wide. The XLZ's are probably 90-95% with close to an inch of tread. They are 10ply tires & they come with run flat inserts (or so a marine told me.. I still havent gotten a chance to break one down). But I want $600 for a set of those with the rims. I actually have 7 of them so if anyones got a dually I'll cut you a deal!
For the XL's I am asking $500 a set & I'll toss in a spare w/ 20-30% tread for an extra $40.00
If anyone wants pictures or anything shoot me an email at firstname.lastname@example.org
& I will try to send you some.