Sorry Rico, what ever the sidewall says! not sure 80 lbs in a P-metric would be very smart......then again, use NW'rs arnt very smart Ive been told! Something to do with skiing in mtns, that high elevation of ours gives us some kind of edema which is not good.......that is my story, and I am sticken to it. oh, the michiblows did not get me to the top of rainer too well.......