Midco Sales has detachable goosneck lowboy trailers for sale. These trailers are sometimes referred to as RGN trailers.
A hydraulic detachable gooseneck is the fastest and easiest to detach. It is detached using hydraulic cylinders to raise and lower the trailer, allowing the truck to remove the neck. Machinery can then be loaded from the front of these lowboy trailers. This hydraulic operation can be run from the truck or from a pony motor mounted on the neck of the lowboy.
A mechanical detachable gooseneck offers a more lightweight neck and requires less maintenance, but isn’t as quick and easy to detach as lowboy trailers with hydraulic gooseneck options.