With a real truck, you don't need such a contraption!
Ditto that. I don't like the two small tires. Tires that size do not do well at highway speeds, spinning at about three times the speed of the rear wheels. There would be a big load on the bearings. Since it is in a fixed position, the tires would scuff in turns. They would take a big blow on uneven ground or in/outs of driveways. It is a four lug lightweight wheel, even if it has a trailer rated tire on it. I also notice that the truck is a 5 lug wheel with street radials. That is the low end on truck series. I think this device invites overloading of wimpy trucks by people who don't understand that pulling something and towing something are two different things. Seen a lot of rigs in the ditch, and they were mostly wimpy trucks that were overloaded.