theyre pretty good. much better when aired down to about 22psi, went to buildwas at 35 psi and nearly got stuck in the clay only got out with a heavy foot. but then aired down and they feel so confident then, can take them to about 20 safely imho. Dont compare them to the likes of special tracks, special tracks run rings around them in the mud, but are dreadful on the road.
personally i like the stt, havent got stuck (due to no grip) yet... and well behaved on road