This whole conversation has been a real eye opener. I don't think we have ever checked the air pressure in the spare. It is up under the rig and you never think of crawling under there to check the spare. We DO travel with a small air pump so we could add air but it would take time.
We will probably chain and padlock this thing as per the other post herein.
The good news is that we have found a rim in stock 50 miles north and can get a new tire in time for our trip. If we do not have time or the material for the mounting we can chain it to the bed of the pickup.
We will be leaving here July 1 for the rally, with stops at Rocky Mtn Nat Park, Moab UT, then Mesa Verde Nat Park. I love the west and can't wait. Oh and 3 days in Sedona after the rally then home.