My 80 series scales out at 6300 lbs empty. With all our gear loaded up and dragging our trailer we are at 8,000 lbs. 7,000 on the truck and 1,000 lb trailer. My KO2 "E"s are currently at 35,000 miles. I've rotated them once and keep 36lbs of pressure in them. Of that 35k, 20 of them were long...