I have ridden my 07 WR450 twice since I got the bike, in the desert north of Phoenix. The trail is really rocky/gravelly/technical. The original stock rear tire was in pretty good shape when I got the bike, like 80%. After 2 rides, I will be lucky if I have one more ride left on this tire. The knobs just rip off. It looks like crap. Looks like some one threw it in a giant food processor. What is the best tire for harsh desert? Does it help to go super wide in size?