Well its been awhile since i posted. I went out to a derby a few weeks back and got a great chance to test the zillas. While there were some others with very aggressive tires like the silverbacks,,the zillas held their own.. In my particular group we had (all 3 polaris) one had mudlight xtr,one stock tires, and my zillas..It was night and day,,,in our mud conditions i could crawl in 2wd where the atv with stock tires got stuck,,,and the mud lights seemed to really spin to clear where the zillas just kinda easily dug threw.. haveing said that, as i said before,,the guys with the silverbacks were in some insane mud i wouldn't even attempt and dont think i could,especially for fear of swampping the bike,so if your going to be the mud king you don't buy zillas imo anyways. As far as an all purpose im more than happy! Take as you will.