Hey Jay, check out this link...
Club Vmag official tire post

I've got 31" Pro Comp ATs on Tech 1 black Rock Crawler 15x8 steel wheels. The offset is 3.75, and some trimming of the cladding was needed. These tires are not noisy on the road, and are amazing off-road. They are also very good it the rain and snow. I did lose a little of the cornering ability I had with the stock 18s, but the benefits FAR outweigh that loss. I don't think Kasia had to trim her cladding because her wheels are not offset like mine, but she is pushing the 32" mark with her setup, so I might be wrong. Hope this helps!