Curious about spare tires. I've not had a flat on the last three trucks. With a dually, one could always remove the flat and continue (slowly) on the remaining 5 tires. There's plenty of people running heavy campers on single rear wheels, the load rating of the OEM tires in single use on my Ford is 3750 which would be slightly under the 3920 I measure on each rear. Driven slowly to the next place to have the flat fixed is probably going to work. And you get to use the spare location for another fuel tank.
Any opinions?