Kingpin to Gooseneck Adapter: 3 Top Picks Compared

If you own a fifth wheel hitch but need to tow a gooseneck trailer, a kingpin to gooseneck adapter is the simple solution. It converts your truck’s fifth wheel setup into a gooseneck ball receiver, saving you the cost and hassle of swapping hitches.

This guide compares three top-rated adapters, focusing on build quality, towing capacity, and ease of installation. Whether you’re hauling a camper, trailer, or tractor, you’ll find the right adapter for your needs.

Misakomo Fifth Wheel to Gooseneck Adapter – Forged Steel Durability

The Misakomo adapter stands out with its robust forged steel construction and one-piece machining, which together provide maximum strength and durability. You can trust this unit to handle heavy loads, as it features a 2-inch kingpin and a 2-5/16 inch gooseneck ball with a 3/5-inch bolster, engineered for a towing capacity of 30,000 lbs. The 8-inch diameter middle disc is precision-designed to better manage dynamic forces during towing, reducing stress on your hitch and trailer.

Installation is straightforward—the adapter is designed for a hassle-free setup, so you can get on the road quickly. The black finish adds a clean look, and the forged steel ensures long-lasting performance even under demanding conditions. If you prioritize strength and a precise fit for heavy-duty towing, this Misakomo adapter is a reliable choice.

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• Built to Last – The kingpin to gooseneck ball adapter is engineered with robust forged steel and precise one-piece machining for maximum strength and durability. This ensures a uniform distribution of force and a high resistance to breakage. It’s topped off with a protective coating for outstanding rust resistance, making it ideal for withstanding both severe weather and the test of time.
• Heavy-Duty Towing Capacity – This fifth wheel hitch adapter features a dependable 2-inch kingpin and a 2-5/16 inch gooseneck ball with a 3/5" bolster, engineered for maximum towing performance. It is capable of handling up to 30,000 lbs of gross trailer weight, perfect for securely transporting large fifth-wheel and gooseneck trailers.
• Precision Designed – Specially crafted for trailer-fifth wheels, the 5th wheel to gooseneck adapter's 8" diameter middle disc is optimized to better handle the dynamic forces during towing and reduce potential wobble, ensuring a stable and safe journey.
• Installation Made Simple – The 2085295 Gooseneck Ball Adapter offers a hassle-free installation, allowing for quick and secure attachment of your gooseneck or fifth wheel trailer to your truck, without the need for welding or extensive modifications. Simply adjust the main post of your gooseneck trailer as needed to ensure a level tow.
• Usage Guidelines – Ensure the fifth wheel is securely locked in an upright position to avoid tilting or unnecessary stress on the adapter. For trailers with an offset gooseneck, stabilize the fifth wheel plate to prevent articulation. Be cautious with pick-up type fifth wheels that swivel 360°, as they may not be compatible with this adapter.
• Verify Product Dimensions – Before making a purchase, please confirm the dimensions of this gooseneck ball adapter. Not all adapters are identical or share the same measurements. It is essential to verify that this adapter is compatible with your trailer and towing setup BEFORE PURCHASING to ensure a proper fit and avoid any compatibility issues.

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MARKETTY Gooseneck Ball Adapter – Forged One-Piece Design

The MARKETTY adapter uses a one-piece machined forging process, ensuring uniform force distribution and strong performance. It allows your gooseneck trailer to be towed by a fifth wheel hitch without any welding, making installation quick and safe. The 2-inch forged kingpin and hardened steel construction provide a stable structure, while the 8-inch diameter middle disc is designed to bear the trailer’s weight effectively.

Note that this product is unpainted, so some surface rust may appear over time—this is normal and does not affect functionality. The adapter is specifically designed for trailer-fifth wheels, offering a reliable connection for campers, trailers, and tractors. If you prefer a no-fuss, unpainted option that still delivers solid performance, the MARKETTY adapter is a practical pick.

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• Quick installation: This fifth wheel to gooseneck adapter allows your gooseneck trailer to be towed by a fifth wheel hitch, easily and safely installed on your truck without welding or dismantling the truck chassis. Installation takes just a moment.
• Forging process: kingpin to gooseneck ball adapter use one-piece machined, forging process, uniform force, strong enough. The product is unpainted so some surface rust may be present when received.
• Design object: Kingpin adapter specially designed for trailer-fifth wheels, diameter of the middle disc of the fifth wheel to gooseneck adapter is 8", which can better bear the traction force of the trailer when it is on the road, and the use of spacers can better solve the problem of possible shaking.
• Stable structure: The fifth wheel hitch adapter has a solid 2" forged kingpin, hardened steel 2-5/16 inch gooseneck ball with a 1/2" bolster. Tested safety, this Kingpin Adapter is tested according to SAE J2638 specifications for safety and is rated to tow up to 30,000 lbs gross trailer weight rating.
• Please note: Sometimes if the trailers gooseneck is offset you may need to block your fifth wheel plate to keep it from tilting/articulating. You may also have to adjust the main post of your gooseneck trailer to allow the trailer to ride level.

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EXODIOS Fifth Wheel to Gooseneck Adapter – Enhanced Maneuverability

The EXODIOS adapter features a 4-inch round tube design and a 2-inch kingpin, with a 30,000 lbs load capacity. It is built from high-quality steel with a black frosted finish that offers excellent rust and corrosion resistance. One of its key advantages is improved turning and maneuverability compared to a traditional fifth wheel hitch, making it ideal for tight spaces and winding roads.

This adapter is designed for versatility, fitting campers, trailers, tractors, and semi-tractors. Installation is easy without the need for modifications, so you can switch between towing setups quickly. The sturdy construction and enhanced maneuverability make the EXODIOS a great choice if you frequently navigate challenging terrain or need a flexible towing solution.

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• Versatility and Compatibility: The 5th Wheel to Gooseneck Kingpin Adapter is designed to work with a variety of towing setups, including semi-tractors, campers, trailers, and tractors. This adapter is compatible with vehicles that have a 4-inch round tube and a 2-inch kingpin, making it a flexible option for various towing needs.
• Increased Maneuverability: One of the advantages of using gooseneck to 5th wheel adapter is that it provides better turning and maneuverability compared to a traditional 5th wheel hitch. If you frequently need to make tight turns with a trailer or camper, this adapter allows you to improve handling and reduces the likelihood of jackknifing during low-speed maneuvers.
• Sturdy Steel Construction: The 5th wheel gooseneck adapter is made of high quality steel and the surface is coated with a black frosted finish, offering excellent rust and corrosion resistance while significantly enhancing durability and service life. With a carrying capacity of 30,000 lbs, bringing you a safer driving experience.
• Easy to Install: Gooseneck to 5th wheel adapter is designed for easy installation without the need for any complicated tools or procedures. It attaches securely to the 5th wheel hitch and provides a simple way to convert to a gooseneck configuration. This convenience is especially valuable for those who want a quick solution for different towing setups, without the need for professional installation.
• Strong and Secure: The gooseneck to 5th wheel adapter is designed to ensure a tight and secure fit, with no noticeable play or movement once attached. This secure connection ensures that your trailer, camper, or other towed equipment stays safely in place during transportation, providing peace of mind on the road.

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Buyer’s Guide: What to Consider

When choosing a kingpin to gooseneck adapter, focus on load capacity, build quality, and ease of use. Here are five key factors to consider.

• Load Capacity: Check the adapter's maximum towing capacity. Most models offer 30,000 lbs, but ensure it matches your trailer's weight.
• Build Material: Forged steel or one-piece machined steel provide strength and durability. Avoid cast materials for heavy towing.
• Kingpin and Ball Size: Standard sizes are 2-inch kingpin and 2-5/16 inch ball. Verify compatibility with your fifth wheel hitch and gooseneck trailer.
• Ease of Installation: Look for adapters that require no welding or modifications. Quick installation saves time and reduces setup hassle.
• Finish and Corrosion Resistance: A painted or frosted finish helps prevent rust. Unpainted adapters may develop surface rust but remain functional.

Conclusion

Each of these three adapters offers reliable performance for converting your fifth wheel hitch to a gooseneck ball. The Misakomo excels in heavy-duty strength, the MARKETTY provides quick no-weld installation, and the EXODIOS enhances maneuverability.

For most users, the Misakomo is the top pick due to its forged steel build and high load capacity. However, if you prioritize easy installation or better turning, the MARKETTY or EXODIOS are excellent alternatives.