I had the XLs on mine, 11.00r16 as has been stated. Loved them, they did good in everything, and IME as opposed to TiredIron, these do GREAT in the mud...hell my XLs did great in anything and everything but rocks, these things are like ice blocks, racing slicks would grip better in the rocks than the XLs. Sand was no problem, even the softest sand at Ocracoke couldn't stop those bad boys. Never got stuck in any mud I put myself in, and these only had about 40% tread or so.
But, I bought them for test fitting as they are close to the same size as the 38.5x11 boggers I have been wanting. Well, they fit and worked better than I expected, but now that I have boggers, I say if you can get a set of boggers for $650 like I did, then go for it, but the $600 vs $1k+ is a no brainer, run the Michelins all day long, but if it was $600 vs $650 like the deal I got, the boggers are a dream come true.