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5th Wheel to Gooseneck Adapter


You already have a gooseneck hitch installed in your truck, but then you see this shiny new fifth wheel that you are destined to have. You don't really know if it's possible for you to even tow a fifth wheel with your gooseneck hitch, but you definitely don't want to install a whole new hitch or get a different truck.So where does this leave you? Well, you're in luck. There is a way tow a fifth wheel while still keeping your gooseneck hitch, so keep reading to find out how.

Can You Pull a 5th Wheel with a Gooseneck?

With the use of an adapter, you can definitely pull a 5th wheel with a gooseneck hitch, but the question you should really be asking is should you. Fifth wheel-to-gooseneck adapters will usually put additional stress and wear on both your fifth wheel trailer and your gooseneck hitch, so this should not be your first choice if you tow the same trailer very frequently. It's ultimately best to tow a fifth wheel trailer with a fifth-wheel hitch, and same for a gooseneck trailer, as that is how trailer and hitch manufacturers design them to be used. However, if you are in dire need and do not want to drop four-digit cash on a hitch setup, an adapter will do just fine for you.

What is a 5th Wheel Adapter?

A fifth-wheel adapter is an adapter that you can either attach to your fifth wheel itself, or to the gooseneck hitch in your truck. These can be either a permanent or a temporary solution (most are temporary). If you occasionally need to tow your fifth wheel with a vehicle that already has a gooseneck hitch, this can be an excellent and convenient solution for you.
If you'd like to tow a fifth-wheel trailer but you have gooseneck hitch in your truck, 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.There are four types of adapters to choose from that will allow you to tow a fifth wheel with a gooseneck hitch. Below I have ranked them from best to worst, based on factors such as ease of use, wear and tear, and overall quality.
Types of 5th Wheel Adapters
1. 5th-Wheel Adapter that Replaces the Trailer Pin Box
Reese Goose Box Adapter
Choosing an adapter that replaces your fifth wheel's pin box is the safest and most secure option to go with when towing a fifth wheel trailer with a gooseneck hitch. The Reese Goose Box is a popular adapter of this type; however, it's only available to replace these specific pin box numbers: Lippert 1621 and 0719 (20k), Lippert 1621 (16k), and Lippert 1716 and 1116). If you're not sure of your pin box number or how to find it, click here. What We Like:
  • Doesn't cause any additional stress on either the trailer frame or hitch
  • Fully enclosed air bag and dual shock absorbers to create a smooth, cushioned ride
    • Improves handling and overall ride
    • Reduces strain on truck and trailer
  • Leaves your truck open for other uses
  • Custom fit to fit your trailer means no drilling/welding required
What We Don't Like:
  • You won't be able to take on and off in between uses since it's a more permanent solution
  • Much pricier than other options since you're replacing your entire pin box
  • You can't install on your own because of its weight (approx. 200 lbs)
Note: 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.
2. 5th-Wheel Adapter that Installs in the Ball Hole of the Gooseneck Hitch
Curt X5 Rail Adapter
Using an adapter that installs in your gooseneck hitch's ball hole is another excellent option for adapting your fifth wheel trailer to your gooseneck hitch. You may like this option better than the first, as it's not a permanent installation, and therefore is a great solution if you frequently switch between trailer types. What We Like:
  • Great solution if you have to tow multiple trailer types with the same vehicle
  • Adapter is easily removed when you need to haul cargo in the truck bed
  • More affordable than replacing your pin box
  • Adapter plate gives you standard, universal rails to work with almost any fifth-wheel hitch
What We Don't Like:
  • You must already have fifth-wheel hitch to use an adapter plate or purchase one separately
  • Not many options for short beds
  • Hitches that attach to ball hole (B&W Companion) aren't as budget-friendly as adapter plates

Popular adapters that attach to the gooseneck ball hole

There are several different brands that offer this type of adapter, and each one has its own benefits and drawbacks.
B&W Companion
B&W Companion
  • 3 Height settings from 16-1/4" to 18-1/4"
  • Custom made for B&W Turnoverball hitches only
  • Available in 3 types: fixed, slider, or flatbed-style
  • 360-degree contact with king pin for secure, comfortable attachment
  • Widely recognized as one of the best 5th-wheel hitches in the industry
  • Check our fitguide to see which one will fit on your truck
  • Up to 20,000 lbs. GTW (22,000 for flatbed)
  • Limited lifetime warranty
Draw-Tite Hi-Rise 5th-Wheel Adapter
Hi-Rise 5th-Wheel Adapter
  • Greater height adjustment than B&W from 14-1/4" to 18" tall (normal range for fifth-wheel trailers)
  • Works with Draw-Tite, Bulldog or B&W under bed gooseneck hitches
  • Up to 18,000 lbs. GTW
  • Single, self-latching jaw for tight, secure fit
  • If bed liner present, trimming may be necessary
  • 2-Year limited warranty
Curt X-5 5th-Wheel Rail Adapter
Curt X-5 Adapter
  • Comes in 3 models:
    • X-Plate (C16210) for Curt hitches - fits Curt Double-Lock, Flip and Store gooseneck hitches with round hole
    • X-Plate (C16220) for Curt EZr hitches - fits Curt Double-Lock, Flip and Store gooseneck hitches with round hole
    • X-Plate (16310) for B&W hitches - fits B&W turnover ball hitches with square hole
  • If bed liner present, trimming may be necessary
  • Up to 20,000 lbs. GTW
  • Limited lifetime warranty
Demco 5th-Wheel Rail Adapter
Demco 5th-Wheel Adapter
  • Only works with B&W Turnoverball gooseneck hitches
  • Unlike Curt and Draw-Tite, this has an adjustable mount to fit with a bed mat/liner without trimming
  • Up to 21,000 lbs. GTW
  • 5-Year limited warranty
3. 5th-Wheel Adapter that Attaches to the Gooseneck Ball
Demco Recon Adapter
If you have a gooseneck hitch installed in your truck bed and aren't able or just don't want to have to take the gooseneck ball in and out to tow your fifth wheel, this is a great option for you. This style of adapter attaches to the existing gooseneck ball already in your truck bed, and provides you with a fifth-wheel hitch so that you won't have a lot of the additional stress and strain on your fifth wheel as some of the other types of adapters can cause.One adapter that is great if you want something lightweight and light on your wallet is the Demco Recon. The Recon is an popular and excellent adapter that attaches to the gooseneck ball in the truck bed to give you a fifth-wheel hitch. The Recon is offered in a standard gooseneck ball style, and in a recessed gooseneck ball style as well for flatbed trucks.What We Like:
  • One of the lightest hitch options available
    • Easy to take in and out
  • Wraparound, single jaw for most secure connection possible
  • Available with 3" offset for extra turning clearance
  • Quick and simple installation
  • No need to remove gooseneck ball
  • Cushioning polyurethane dampeners absorb shock and reduce noise while towing for a very comfortable ride
What We Don't Like:
  • Not compatible with rotating pin boxes (sidewinders)
  • Won't work with high-rise gooseneck balls
4. 5th-Wheel Adapter that Bolts to the King Pin
Convert-A-Ball Adapter
This type of fifth-wheel-to-gooseneck adapter is a tube that bolts 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, just like a standard gooseneck coupler would. This type of adapter can also come with an offset to provide a bit more turning clearance for short bed trucks, and the adapters made by Convert-A-Ball also feature polyurethane cushioning to help minimize strain and wear on your trailer and hitch.What We Like:
  • The pin box does not have to be removed or modified for installation
  • Easier to take on and off than Reese Goose Box
  • Available with or without an offset to accommodate for short-bed trucks
  • Typically more affordable than the other options
What We Don't Like:
  • Adapters can be heavy - an extra set of hands will help with installation
  • Designed as a temporary solution - over time these put extra strain and wear on both your trailer and hitch
  • Not all trailers can use this type of adapter - confirm with the trailer manufacturer
Determining the Correct Height for Your Adapter
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.
How to Measure Height for Adapter
Measuring Your Truck and Trailer
  • Back your truck into position as if you were hooking up your fifth-wheel trailer, making sure that the truck and trailer are level
  • Measure from the king pin plate down to the top of the ball in the bed of your truck
  • The measurement you get is the total height of the adapter you will need
Note: Five to 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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Updated by: Olivia M.Last Updated: 2/14/2020

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