The sidewalls SUCK on the rocks /forums/images/graemlins/eek.gif. The sidewalls are weaker than BFGs IMHO, and that sayin much....The second hard trip out with em, I warrantied 2 side walls, and really tore up another good, but had to keep it. I guess they would be alright for mud, but I don't do mud...The 35-12.5-15 tires wore 4/32 on the street with only 4000 miles, balanced and correct alignment. If I had it to do over again(which basically I did), I would have got MTR's or SX's . I run the coopers on my street truck now, no hard wheelin for them babies.....