Update on the Wild Thangs / Zillas. Took them out to my lease this weekend and was driving into our ponds. Really pleased with the tires so far. They ride very smooth (above 3-4 mph) on hard surfaces, and they pull in mud really well. They clean out at low rpms, pulling through mud felt very smooth and wasn't working the machine hard. Also eat up the bumps on the trail well. Both guys I rode with commented how smooth the ride was under a heavy load (8 dozen decoys, blind, etc)
Top speed with another guy and the dog riding was 40mph on the street.