
That's a 20' car hauler trailer. It's meant to be pulled with its payload car facing forward, with the heaviest part of the towed car (engine) all the way at the front.
I've never pulled a car hauler; if I had, I probably wouldn't be asking this question. But, I have pulled other bumper-pull cargo trailers, and they have the two axles positioned more or less centered on the trailer. I know that, when loading the cargo trailer, you want more of the load on the tongue (supported by the truck's suspension) than you do on the tail. This keeps the trailer from wanting to lift up off the ball hitch, and it keeps the trailer from swaying at highway speed. You don't want to overload the tongue though, lest you damage your truck's suspension. I usually use an eyeball measurement of my truck's rear suspension for a ballpark "correct" tongue load; if my truck sags 2-3", good, otherwise, not.
So in the case of the car hauler, I would think that having the trailer axles centered on the trailer (just like on the cargo trailer) would be ideal. When you pull the payload car onto the trailer, the heavy part (engine) would be at the front, where you want the most weight, and everybody would be happy. But apparently everybody isn't happy, because they felt the need to move the axles a few feet further back, meaning (I assume) that now 75% or more of the heaviest part of the [car + trailer] will be resting on my truck's suspension.
I want to pull a car hauler with another fullsize chevy pickup (heavy) on it. In my mind's eye, I see the trailer with that heavy 'ol rustbucket on it bottoming out my truck's (the pulling truck's) rear suspension. But I must be wrong about that, or else I would not find that every single trailer manufacturer makes their car haulers like this. Can someone explain why?