For truck owners who frequently tow 5th wheel trailers but prefer the convenience of a gooseneck hitch, a 5th wheel king pin box for a gooseneck hitch is the ideal solution. This specialized adapter allows a 5th wheel trailer to be towed using a gooseneck hitch, eliminating the need for a bulky 5th wheel hitch while maintaining strong towing capability.

How a 5th Wheel King Pin Box Adapter Works

A standard 5th wheel king pin is designed to connect to a 5th wheel hitch, but with an adapter, it can be converted to work with a gooseneck ball hitch. The king pin box adapter extends downward from the 5th wheel trailer and features a gooseneck coupler, allowing it to securely latch onto the gooseneck ball in the truck bed.

Types of 5th Wheel to Gooseneck Adapters

There are several types of adapters available, each designed to accommodate different towing needs:

1. Fixed Adapter: A simple, rigid connection that converts the 5th wheel king pin into a gooseneck coupler.
2. Cushioned Adapter: Designed with shock-absorbing technology to reduce vibrations and improve ride quality.
3. Full Replacement Pin Box: A complete replacement for the existing 5th wheel pin box, built with an integrated gooseneck coupler for a seamless connection.

Advantages of a 5th Wheel King Pin Box for Gooseneck Hitch

✔ Maximizes Truck Bed Space – Unlike a large 5th wheel hitch, a gooseneck hitch is installed below the truck bed, allowing for full use of the cargo space when not towing.
✔ Versatile Towing Setup – If your truck is already equipped with a gooseneck hitch, using an adapter eliminates the need to switch back and forth between hitches.
✔ Easy Installation – Many adapters can be installed quickly, reducing downtime and making the conversion process simple.

Potential Considerations

✖ Increased Stress on Trailer Frame – Some adapters can transfer additional stress to the trailer’s frame, which may impact durability. Choosing a cushioned or air-ride model can help mitigate this issue.
✖ Warranty Concerns – Some trailer manufacturers may void warranties if a gooseneck adapter is used instead of a traditional 5th wheel hitch. Always check with the manufacturer before making modifications.

Is a 5th Wheel King Pin Box for Gooseneck Hitch Right for You?

If you own a gooseneck-equipped truck but need to tow a 5th wheel trailer, a king pin box adapter offers a practical and space-saving solution. It allows for seamless towing compatibility while keeping your truck bed free for other cargo when not in use. Whether you choose a fixed, cushioned, or full replacement pin box, this adapter can help you get the best of both towing worlds.

For those looking to optimize their towing setup, investing in a 5th wheel king pin box for a gooseneck hitch can make a significant difference in convenience, performance, and overall efficiency.