Onza Dave and Dan. Gary Fisher Hoo Koo E Koo
Pros: Wear like iron, resist mesquite and locust thorns better than any tire I've ever had, self clean real well, and grip everything from hardpack to mud. Best offroad traction I've ever had. If you break these loose, you would have already been down or stuck with IRCs, Maxxis, or WTBs
Cons: Heavy pigs, rolling resistance on pavement, and I can't find them anymore.