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i have never seen or heard of chains being used in mud or dirt.


I've never personally know anyone who's used chains offroad, but they're used on heavy logging equipment to improve traction - and skidders are already running gonzo tires!
Here's an intersting article on the use of tire chains in the mud: http://www.rockcrawler.com/departments/landcruiser/qna/qna020198a.htm


97 Montero SR: Factory rear locker, 3.5 L 24 Valve V6, ActivTrac 4wd (Love it) , 3 way suspension, four wheel disk brakes, 32x11.50 Pirelli Scorpion ATs