we3 wrote:
I have built several tag axles for pick up trucks and truck campers. Mine were designed so you could lift them off the ground or inflate the airbags and transfer 1800lbs to the tag axle without affecting the front axle weight, all with two switches on the dash. I patented the idea and presented it for manufacture. I soon learned that any time you modify the suspension of a vehicle the liability goes out of sight.
Yes.
I see nothing wrong with adding a tag axle especially with brakes if the truck is operated properly. For ditch driving and such it depends on how much wheel travel is designed into the suspension.
Last week I met a truck camper rig with a tag under it on the highway near the Alberta Rockies.
It is interesting this company has the equipment certified as a trailer ( or "Tag Trailer") so it is not a modification to the vehicle.