air pressure 16.5\" So, I put the 16.5 wheels with 35 MT's on the K5. It is now officially 3/4ton. I'm looking for a D60, just haven't found one yet. Anyways, I am going wheeling on sunday, and the trail is kindof long, not all that difficult, and I want to air down the tires. I am used to 15" wheels, so I've never worried about popping the bead on the K5. So, what is the lowest I should go without worry?