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  1. Gooseneck and Fifth Wheel Adapters
  2. Convert-A-Ball
  3. Fifth Wheel Trailer to Gooseneck Hitch
  4. Bolts Over King Pin
  5. King Pin Adapters
  6. 20000 lbs GTW
Convert-A-Ball Cushioned 5th-Wheel-to-Gooseneck Adapter w/ Offset - 12" to 16" Tall

Convert-A-Ball Cushioned 5th-Wheel-to-Gooseneck Adapter w/ Offset - 12" to 16" Tall

Item # CAB-C5GX1216
Our Price: $691.96
You Save: $201.36
Gooseneck and Fifth Wheel Adapters
Shipping Weight: 88 lbs
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Use your gooseneck hitch to tow your 5th-wheel trailer by hooking up with this coupler adapter. Poly cushions absorb shock for a smooth ride. Adjustable height fits multiple applications. Offset design is perfect for short-bed pickups. 20,000-lb GTW. 1-800-940-8924 to order Convert-A-Ball gooseneck and fifth wheel adapters part number CAB-C5GX1216 or order online at Free expert support on all Convert-A-Ball products. Great prices and Fastest Shipping for Convert-A-Ball Cushioned 5th-Wheel-to-Gooseneck Adapter w/ Offset - 12" to 16" Tall. Gooseneck and Fifth Wheel Adapters reviews from real customers.
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Convert-A-Ball Gooseneck and Fifth Wheel Adapters - CAB-C5GX1216

  • Fifth Wheel Trailer to Gooseneck Hitch
  • Bolts Over King Pin
  • Convert-A-Ball
  • King Pin Adapters
  • 20000 lbs GTW
  • Offset
  • Adapts Trailer
  • Adjustable Height

Use your gooseneck hitch to tow your 5th-wheel trailer by hooking up with this coupler adapter. Poly cushions absorb shock for a smooth ride. Adjustable height fits multiple applications. Offset design is perfect for short-bed pickups. 20,000-lb GTW.


  • 5th-Wheel-to-gooseneck adapter lets you tow your 5th-wheel trailer with your gooseneck hitch
    • Coupler bolts to your trailer's king pin and connects to gooseneck ball
  • Interior polyurethane cushions act as shock absorbers for smooth, safe ride
    • Reduce bounce and vibration
    • Minimize wear and tear on both your trailer and tow vehicle
  • Offset design provides additional clearance when making turns with short-bed pickups
    • Not recommended for trucks with beds shorter than 6'
  • Adjustable height fits multiple applications
  • Fail-safe king pin adapter has built-in, positive-lock feature to secure trailer to hitch ball
    • Steel extension handle lets you slide bar to lock or unlock coupler from outside the truck bed
      • Acts as a latch, keeping adapter secure
      • Can be replaced with a padlock (sold separately) for greater security
  • Durable, cast steel construction
  • Rust-resistant powder coat finish
  • Safety chains included
  • Made in the USA


  • Application: 2-5/16" gooseneck hitch balls
  • Towing capacity: 20,000 lbs
  • Pin weight capacity: 4,000 lbs
  • Height: 12" - 16"
  • Offset: 7-1/2"
  • Safety chain overall length: 25-1/2"
  • 2-Year limited warranty


  • Not recommended for use with Reese Elite Series gooseneck trailer hitches
  • Not recommended for use with factory-installed towing prep packages which use a hitch ball with an integrated locking lever.
  • Not compatible with sidewinder king pins.
    • When used together they produce two pivoting points at both the ball and the turret which is a safety hazard.
    • Any adapter that attaches in this way may void your trailer's warranty.
  • Not compatible with any cushioned or air ride 5th wheel king pin.

Finding the Correct Size Fifth-Wheel-to-Gooseneck Adapter

After backing the vehicle under the trailer, measure from the top of the ball in the truck bed to the base of the pin box on the trailer. This will indicate the height of the adapter that you need.

Convert-a-Ball Collar

Secure Installation

The included collar slides over your fifth-wheel trailer's king pin and is held in place with set screws. Additional, larger set screws that are mounted at the top of the coupler adapter then tighten onto the collar. Because this adapter is designed with an offset, the top lip of the adapter must also be bolted to the base of the pin box to ensure proper positioning.

Convert-a-Ball Locking Feature

Positive-Locking Feature

This trailer coupler adapter features a simple, secure latching mechanism for safe, easy hookup with the hitch ball. The convenient extension handle grabs the sliding latch so that you can easily lock or unlock the coupler from outside the truck bed. Once the coupler is engaged, hook the handle through the hole in the sliding latch's track to ensure that it remains securely coupled. For extra safety, once the coupler is latched, you can replace the handle with a padlock (sold separately) to secure the trailer to the hitch ball during towing. Use a lock while your trailer is being stored to guard against towaway theft.

Offset Design

This coupler adapter is specially designed for use with truck beds that are between 6 feet and 8 feet in length. The offset allows your trailer to sit a bit farther back than it normally would so that you can make turns safely and with confidence. Supplying that extra space between your trailer and truck cab creates the clearance necessary for you to make tight turns without your trailer hitting your cab.

Pin Box Length

Note: There are no recommended limits to the length of pin box on which the Convert-A-Ball trailer coupler can be used.

C5GX1216 Convert-A-Ball Adjustable Fifth-Wheel-to-Gooseneck Coupler Adapter with 7-1/2" Offset - 12" to 16"

Replaces 5GX1214 and 5GX1416

Customer Satisfaction Score:

Customer Reviews

Convert-A-Ball Cushioned 5th-Wheel-to-Gooseneck Adapter w/ Offset - 12" to 16" Tall - CAB-C5GX1216

Average Customer Rating:  4.7 out of 5 stars   (893 Customer Reviews)

Use your gooseneck hitch to tow your 5th-wheel trailer by hooking up with this coupler adapter. Poly cushions absorb shock for a smooth ride. Adjustable height fits multiple applications. Offset design is perfect for short-bed pickups. 20,000-lb GTW.


I liked the idea of this hitch; adjustability, easy transfer truck-to-truck etc. However, I couldn't stop it from pivoting in the middle. On sharp turns, the safety chain would get caught on the hitch and bend the eyes in the bed and/or cause the hitch to pivot within itself. It did not pivot on the 5th wheel plate. I will go back to my Anderson and sell this one. I placed a small pic with arrow pointing to the pivot point. Thanks

Etrailer Expert

Jenny N.


I would like to reach out to the manufacturer about the issues that you are having with the adapter. I have a few questions that I need to ask before I do. This adapter is not recommended to be used with Reese Elite good neck hitches, with factory-installed towing prep packages which use a hitch ball with an integrated locking lever, sidewinder kingpins, or with any cushioned or air ride 5th wheel king pin. Do have any of these set ups? Would you be able to send a picture of where the safety chains become caught on the hitch?


I ordered a 5th wheel to gooseneck 7 1/2" offset adapter. I didn't receive it for 10 days due to weather delay. When I did receive it I've got 2 of the same item, The boxes were labeled incorrectly. Now I have to go through the problem of sending the extra one back and wait on the correct item to be delivered, I sure hope there are no weather delays, I need this SOON! Other than this issue I have always had good experiences with ordering through etrailer. I will also do a follow-up review when I receive the correct item.

Etrailer Expert

Katrina B.


It is very unfortunate that this has happened. I have sent your information over to our customer service department for them to better assist you.


This is my first 5th wheel but I have several other gooseneck trailers that I tow on a regular basis. I didn't want to have to switch back and forth so I bought this adapter. I have a long bed but I have a chase rack on it that goes up over the cab. I really didn't want to have to remove it every time I wanted to tow my new toy hauler so I got the offset hitch. Install was very straight forward. Took me about 40 min. to install. The hardest part was getting the bolts in as mine has the long pin box and it was all I could do to reach the holes. I don't have very many miles on it but it tows great. I didn't notice any difference from my other gooseneck trailers.

Pierre B.


After a year in still very satisfied and glad I went this route.


Product itself is fantastic...however etrailer's rep misinformed me that it would work with our fifth wheel and when we got it, it did not. It was a very bad time too as we were moving into our fifth wheel and getting ready to move 2500 miles across the country. THANKFULLY the owner of Convertaball was willing to walk us through a fix, which worked. This was my first negative interaction with etrailer and the only time, so far, that I've been disappointed in them.


The gooseneck adapter was as advertised. Showed up on time, but was missing two parts. I had to call 4 times to get it sent out. It took over 2 weeks to get it.


The product came as ordered. Relatively easy to put together, took to a friend's shop to access his pneumatic tools. The instruction book was clearly written and the graphics were very useful. The trailer pulls smoothly.


I received this hitch about a year ago, it arrived with in a week of ordering it. The instructions were simple to understand. It did say it will take two person to install. I was able to install it by myself with in a few hours, What I like about this hitch is that I still have use of my truck bed when unhook when traveling and I don’t have a fifthwheel to haul around. My camper pulls great with this hitch with no complaintion at all. It’s a great hitch.


CAVEAT EMPTOR! Don’t cheese out - get what you really need
Not appropriate for every application but the information provided does not make it clear


this product worked out great for me. I am able to turn almost a full 90* turn with this set up. I would just keep in mind if you have any type of Tunnel cover it is hard to line up other than that great product.


Well, it works, But thats all. I bought it as a quick fix for a stuck goose ball in the bed of my truck. I tow a 2018 Jayco Eagle 5th wheel and needed an option in a pinch. The geometry of this device created a lot of chucking and bucking while towing not to mention the extra leverage on the frame. I towed with it 3 times before finally managing to remove the goose ball, and installed a B&W Companion with OEM hitch points. Night and day difference. I would only recommend this adapter if you have no other choice.


I have ordered many items from etrailer they always arrive fast this gooseneck to 5th wheel adapter installed easy and did the trick for me built very strong. The staff at etrailet is always very helpful.


Owned a year now GREAT product.
very well. Installed in 40 minutes in dealership parking lot. Trailer towed beautifully thanks to cushion in system.


Wow what a great product! Instructions were great and very easy to install. I did it by myself in under a half hour. Looks very strong and better than expected. Arrived in just a few days.


This hitch adapter is heavy duty. It's easy for two people to install in under an hour and all parts fit together well. The instructions were well written in English, which is the official language of our country (USA). The offset adapter works great with my 2011 Ram 2500 4x4 which sits higher due to oversized tires. My shipment was received two days after I ordered it without paying any expedited freight charges!
Thanks to the Convert-A-Ball and the fine folks at my days of listening to a clanging 5th wheel hitch are over. Thank you etrailer.



Hi Dano. Is your truck a shortbed or longbed Thanks Bill



My truck is a 2011 Ram 2500 Crew Cab 4x4 Short Bed.


I have a short bed so I assumed the offset was needed for cab clearance. The off set has a major design flaw. It needs to be drilled through and pinned or welded to prevent it from rotating while backing up. Trust me, we tightened the bolts to the point of denting the post and it still rotated while backing up allowing it to strike my bedside causing significant damage. The offset went in the trash and I used the large flanged adapter successfully after that with out the offset. I then discovered the late model 2018 trailer had plenty of room and cleared the shortbed cab with out the offset anyways! I was trying to fix a problem that didn't exist. Some days you can't win. lol..
Sorry, I can not recommend the offset with out pinning or welding it. But the straight Goose neck adapter works fine.

Etrailer Expert

Jenny N.


I reached out to the manufacturer about the rotation that you experienced. They advised that the front and rear adjustment bolts come partially pre-tightened however will need to be tightened to 110 foot pounds during installation. This can be overlooked or forgotten when the height adjustment is made.


Great product, only reason I gave 4/5 is the safety chain was too short and holes for safety chains too small.


Great product!I had a couple concerns and the people at convert a ball were very courteous and knowledgeable. They addressed my Conan’s it works beautifully.



Used converter all last season and very happy with it, it’s great to use my gooseneck hitch for my fifth wheel and not have fifth wheel hitch taking up box space


I could not use it on the new 5th wheel I bought. Still have it and I am trying to sell it.


Doesn't cushion very much.


worked excelent for the year that i owned this trailer. sinse have sold the whole traler and this hitch and was a definite point of sale to the new buyer. thanks



we have since sold the trailer i bout this for but with that said i absolutely loved the conversion while i had it. made life easier and the long road trips so much more comfortable.


Heavy duty. Two man job to install. Needed longer bolts but manufacturer was very helpful. Tows great, totally satisfied with product and service. I tow a 33foot Carri- lite fifth wheel rv (14000 lbs) with a 2016 F350 4x4 super cab with an 8 foot bed.

March H.


Terrific product. Had to get longer safety chains. Trailer tows great. After sale service is great.


I was not explained about having to drill holes in my fith wheel hitch. This was difficult to do and when done it was not level, very difficult to take trailer off truck, had to use a jack. I had to redo and had to add spacers between fithwheel and gooseneck. This might have been better if I had not got the 7 inch offset, this tended to pull the bolts out of the fith wheel platform. I had to redo this hitch three times.


Easy Hook Up - No 5th Wheel Saddle to remove when you want the bed of your truck back for other use, you simply flip your goose neck ball over - very stable on the road even in High Wind situations - with 8" offset it gives you extra turning radius with the Cab of the Truck - doesn't bind when you are backed into low or high spot, which happens with the King Pin of lower cost fifth wheel hitches - ininstallation instructions were very Good


I bought this adaptor about a year ago and I have to say it has been worth every penny that I paid! I have an 8ft bed with a tool box in the back so having the offset worked great, giving me more ability to turn the trailer right where I needed it to get. Install was fairly simple but you'll want at least 1 more person to help since it weighs almost 90lbs. Have a torque wrench handy to. All in all I recommend this to anyone who has a gooseneck ball in the bed of their truck who wants to own a 5th wheel trailer!


Bought this to convert 5th wheel camper to gooseneck. Hardest part of the install is drilling and tapping the holes to attach to kingpin plate. But once finished and used for the first time, absolutely love it! Camper pulls much smoother than when it was 5th wheel

Show More Reviews

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  • Mounting Dimensions of Convert-A-Ball 5th-Wheel-to-Gooseneck Adapter CAB-C5GX1216 Head
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  • Will the CAB-C5GX1216 Fit a 2020 Ram With Factory Gooseneck Hitch?
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