I dunno as far as fitment. But, I bought the 33x13.50x15 LTB's and have regretted it ever since. They drive TERRIBLE! I typically run street tires, but the times that I do drive from and to trails they plain SUCK! I balanced them myself and can tell you that they are the most out of round tires I have ever seen. That's a substantial statement, given that I have worked in a tire shop for 5 years. The treadlife is awful, I'm expecting between 10k and 15k miles out of them.
On the rocks, they perform very well. They are super agressive and very soft. They cut and chunk very easily, because they are so soft. I am very happy with them once I leave the pavement. But, I think that I would be just as happy with some TSL's, Truxus MT's, or TSL radials. It would be worth the extra cost to go radials IMHO. The Truxus MT's really aren't much more money and would be a FAR BETTER street tire.
Jared