TRIPLEdam,
In the pic is about the deepest mud I have been in so far and the wife was folling untill she decided to not follow my path and she sunk up to almost the top of her rear tires. She put it in reverse and backed right out of it to my surprise, I thought I was going to have to pull her out.
The mud was not a real sticky mud but never once had a problem with them getting loaded up with mud. When they seemed to all you had to do was give it some gas and spin them and they would clean perty good. Them mud hole in the picture was a good three blocks long as we stuck to more of the sides hopeing it would not be as bad but was still perty nasty. We were able to just crawl through most of it and did not really have to use any speed.
I have a pic on 35mm of a stock Polaris with stock tires following behind my wife in the same path we went and he ended up stuck for about a good 20 mins untill his group of riders and I got him out. Not sure he was really expecting the mud though because he was wearing like dress shoes or loafers on his feet..lol Needless to say he never got off to help other wise he would have lost his shoes.
I guess it all depends on how much mud you try to go through and how thick as how well they will perform. For me so far I could not be any more pleased so far for the performance I have got out of these tires so far.
Keep us updated as to how the mudding is going and the limites of the ATR's.