The first clue that something out of the ordinary was going to occur was the Arizona State Patrol car parking in the highway facing oncoming traffic. Shortly, another patrolman arrived and asked me to move our pickup truck and travel trailer farther off the highway even though we were already pulled off in a wayside enjoying lunch. It seemed a very wide load was on its way towards us and it needed to pull off the highway to let the parade of vehicles behind it pass. Soon I could see the procession of patrol cars, the wide load and the string of vehicles behind it slowly approaching. The wide load consisted of a lead truck with three rear axles all sporting duals, a specially built double wide trailer with ten axles, each axle had 8 wheels supporting it and bringing up the rear was a conventional semi tractor hooked to the rear of the trailer via a tow bar. The rear truck was there to push up the hills and supply additional braking on down grades. All told there were 104 tires on the ground moving what appeared to be a very large pressure vessel. How would you like to be the one that has to buy new tires for that rig?
Consider yourself lucky that the longest RV combinations need less than 10% of that amount of tires. That includes spares!