Internal tire pressure monitoring system in a non-modern Toy? The next script-flipper could be inside, unseen?
Either way, my back isn't strong enough for changing the kind of tires that most of Mud admires. Mine weigh 23.8 lbs unmounted, and I'm 5'10" 125lbs. I guess that those Kenda's weigh about 55lbs, 60lbs for something 10" wide at that diameter. Things happen when you add a tire's diameter.
Looking at the Max Load for a 215/75/15 BFG KM3 it is 1765lbs. The Kenda Klever in 33x9.5 is 2535lbs. The difference, multiplied by four, is 3080lbs. With big tires, the overall difference in Max Load between stockish diameter treads is as much as the weight of a minitruck, or an EV Hummer battery.