Originally Posted by MILD THUNDER

I used to haul big wrecking style dump trailers for a demo company. They built their own trailers. They had a very cool feature. Obviously semi trailer with air brakes/air suspension. Anyhow, the suspension was a triple axle air bag setup. The trailer had air valves on the side. You can raise any axle off the ground, by pushing a button. Want to raise the front of the 3 axles, push a button. Want to raise front two axles, push two buttons.

This was a nice feature, as I would often have to back a big wrecking trailer into tight alleys and what not. So, sometimes, I would raise the rear axles off the ground, which made it easier to get in/out of tight quarters. Obviously all 3 on the ground when going down the road loaded.

I think this would be cool on boat trailers. Air bag suspension, with the option to raise the axles. Sometimes backing up a triple axle boat trailer in a tight spot can be hard, but also tough on the axles from the twisting/jackknifing . Prob not something for the average boat, but at the cost of some of the big boy boat trailers, I think it be pretty cool. I know on semi trailers, it really isnt much more cost to opt for air ride suspension over spring suspension.