im running them they are a double edge sword, they are HEAVY but with heavy u get durability as for rocky terrain they do the trick i wouldnt say they are the best but in the mud or muskeg they are amazing they hook up like crazy when im in the "skeg" i can pull wheelies allday long they just plai hook up in that stuff climbing over wet logs suck with these tires they hookup the best in nything that is a bit softer the hard stuff not so much but its totaly a trade off i am personally happy with them but i do alot of mud and soft terrain riding.