Thought this chart was cool.  It shows how much lift either body or suspension...is needed to clear what size tires...also indicates what fits stock and what will only require minor fender trimming...pretty neat has alot of trucks on it everything from ford to suzuki...tire size for suzuki's only go up to 31"...id like the guy that wrote this to check out this site..
http://www.offroaders.com/info/tech-corner/facts/tires/fitting-tires.htm
cheers
Joe

Judging by his estimates for the Jeep Cherokee, it would appear his "specs" are for mall cruisers, not wheelers.