If you have a gooseneck trailer hitch but would like to tow a fifth-wheel trailer, you can choose from among several kinds of adapters that may help you. Some of these adapters attach to your gooseneck ball or use the ball hole of your gooseneck hitch, allowing you to hook up your fifth-wheel trailer without having to modify it. Other adapters mount to the trailer, allowing you to attach it directly to the gooseneck ball in your truck. Which option you choose depends on your particular circumstances.
This type of gooseneck adapter replaces the trailer's pin box. The Reese Goose Box, a popular adapter of this type, is designed to fit the most common fifth-wheel trailer pin boxes on the market. Since Goose Boxes are made to fit specific pin boxes, you'll have to check the plate or sticker on yours to determine the make and model. Goose Boxes are available for the following pin boxes:
The Goose Box features an adjustable air bag and dual shock absorbers to create a smooth, cushioned ride and to reduce stress on the trailer frame. Because this adapter replaces the king pin on your trailer, you won't need to measure for height. The Goose Box is approved by Lippert, a popular trailer frame and pin box manufacturer, and will not void their trailer warranties.
Some fifth-wheel trailer hitch adapters mount into a gooseneck ball hole. The Hi-Rise fifth-wheel trailer hitch lets you keep your Draw-Tite, Bulldog or B&W underbed gooseneck hitch for towing a gooseneck trailer, yet it lets you tow a fifth-wheel trailer when you need to. The Curt X-5 Gooseneck-to-5th-Wheel Hitch Adapter Plate connects to Curt Double-lock, Flip and Store gooseneck hitches, adding a set of fifth-wheel rails that accept standard fifth-wheel hitches, such as those made by Curt, Draw-Tite, Hidden Hitch, Reese, Valley and Husky.
This adapter mounts to the gooseneck ball in your truck bed and supports another gooseneck ball at the top of the adapter's frame. After the king-pin-to-gooseneck adapter is installed on the king pin of the trailer, the trailer can be mounted to the frame. The higher attachment point between the trailer and the hitch relieves stress on the trailer's frame and pin box.
This type of fifth-wheel-to-gooseneck adapter is a tube that mounts around the fifth-wheel trailer king pin at one end and attaches to the gooseneck ball in the back of the truck at the other.
An adapter with an offset can give you a little extra clearance between the fifth-wheel-trailer overhang and the back of the truck cab. It can also create more clearance between the trailer and the back of the truck. Although the offset adapters will provide additional clearance, a sliding fifth wheel hitch or a fixed fifth wheel hitch and a sidewinder pin box will be required to safely execute a 90 degree turn on short bed trucks.
A cushioned adapter features polyurethane cushioning that absorbs the movement and jarring of the trailer, reducing bouncing and vibrations to give you a safer, smoother, and quieter ride.
Adapters that fit around the king pin and attach to the king pin plate have to be the correct height so that you can tow the trailer level. Getting an adapter of the correct height is important for safe towing. Some adapters are height adjustable and others have a fixed height. The shortest available adapter is the Ranch Hitch adapter at 11-3/4 inches. The tallest is the cushioned gooseneck adapter at 16 inches. There is an easy way to determine what height you need for your truck-and-trailer combination.
Measuring Your Truck and Trailer
Also, five or six inches of clearance between the overhang of the trailer and side rails of your truck is necessary for safe operation.
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