In a 37 i wouldnt touch a terra or mud. They dont last, heavy foot or not. Im impressed with my km2's though. 23k and still have half tread left. They dont hook in 2wd anywhere but got me a 1.8 60 ft in the quarter on 37s in 4wd. Not bad for a wheel and tire that weight 120lbs
Thats pretty damn good. I think KM2s will be my next set, but I know some guys that have had real good luck with Micky MTZs. They cost a bit more though.
I still have my old KMs, but there ain't much left of them. I finely wore off my siping and my tires don't seem to have as good as traction any longer. So maybe I'll try and sipe the Terras