Looks like a lot of improvements have been made since the 1972 model year that I had. Back then it was break steering. by slamming the brakes on one side the vehicle's other side would continue and turn. Not very efficient as you were always fighting the power train with the brakes.
Probably an aggravating factor in keeping air in the tires.
Isn't brake steering the same as skid steering? Mine, and I believe even the latest models, are skid steering. To turn right you pull the right handlebar, which activates the brake on the right side and slows down or locks the right wheels and vice versa. The new ones have a different handlebar that turns like a bicycle's, but they still operate on the same skid steering principle. And, yes, if the tires are underinflated, the twisting that they do as they drag sideways on the ground while steering will make air leak out of them, as the bead of the tire is pushed away from the edge of the rim. I always keep mine inflated to at least 5 lbs. It gives you a stiffer ride, but the tires stay inflated. Weather permitting I am going to get my Argo fixed next week. I hate trailering (or driving it) when it rains because it's just a bathtub with wheels and fills up with water. And in the old models like mine you have to take everything out of the back compartment and remove the floorboard to reach and remove the drain plugs. The new ones have the plugs on the outside, like boats. Besides, to drain it completely you also have to drive it up the loading ramp of the trailer, as the drains are not on the bottom.