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Towing should feel steady, not jarring. Inside this adapter are interior polyurethane cushions that absorb shock and vibration between the trailer and the truck. That cushioning helps smooth out rough roads, reducing bounce and minimizing wear on your trailer and tow vehicle. The result is a quieter, steadier pull that doesn’t feel harsh mile after mile.
If you already have a gooseneck hitch, this adapter makes it easy to tow your fifth wheel trailer without swapping hardware. It bolts directly over your trailer’s king pin and connects to a 2-5/16" gooseneck ball. With an adjustable height from 12" to 16", it fits multiple setups and levels your trailer for proper towing alignment.
This adapter has the muscle for serious towing. With a 20,000-lb gross towing capacity and 4,000-lb pin weight rating, it’s built for heavy fifth wheels and stays solid under load. The cast steel construction and rust-resistant powder coat finish add durability that holds up through long hauls and rough conditions.
Hitching up is straightforward thanks to the built-in positive-lock feature. A steel extension handle lets you slide the latch to lock or unlock from outside the bed—no climbing in required. Once engaged, the latch keeps the coupler secure, and you can swap the handle for a padlock (sold separately) for extra protection when parked or towing.
The adapter’s heavy-duty construction stands up to years of use. It comes with safety chains rated for 15,200 lbs each and carries a 2-year limited warranty. With its simple bolt-over installation and rust-resistant finish, it’s designed for dependable performance every time you hook up and head out.
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
Ratings & Reviews
The gooseneck adapter was very easy to install and works and hauls well. I prefer to haul my fifth wheel with this adapter vs. a fifth wheel plate so I have less holes in my bed and my bed is flat. I have noticed my 2016 Chevy 2500HD rides rougher when hauling. I would recommend this product to someone that wants a cleaner bed and does not want to keep moving their fifth wheel plate in and out.
Pulled my 34ft 5th wheel from Texas to Montana. This gooseneck adapter handled the job with no issues. It’s great not having to remove a 5th wheel hitch every time I need to haul something in my pickup bed.
Just received the hitch
Some of this must be UPS but you guys might need to up your game in the packing department.
I can't imagine this hurting this chunk of steel so I'm not too concerned. I have opened the box and all looks good.
It would help to have listed out wrench sizes needed for installation prior to receiving the item. That way I could be prepared if I don't own the right sizes. Thankfully I'm old and have many tools younger people don't have. I do have what is needed in my tool box.
I did appreciate the videos online. They made me feel much more confident in my abilities to install this product with safety.
I own a Ram3500 longbed and will be pulling a 2014 Jayco Eagle 35' 5th wheel. GWV 12060 unloaded. My truck came to me with a Gooseneck hitch built in and I do use the bed on a regular basis. Getting an adapter seemed the logical direction. I did receive a 5th wheel hitch along with the trailer and am planning on keeping it till I know I'm happy with the adapter.
Now for installation...
I'll need to report back after that is completed.
So far I'm going with 3 stars as I withhold my true assessment till I am done and have driven this beast.
This product was a great way to keep the bed of my truck clear by using my flip up goose neck ball to pull my new 5th wheel. I just got back from my first trip pulling through Washington, Oregon, and Idaho and it pulled smooth and great! I had conditions from very hilly two lane roads with 6% slopes to 75mph interstates. I do have to say that the included release lever (the one you can use from the side of the truck) doesnt make any difference because you still have to climb into the truck to remove the chains. Also my truck is a F250 which sits stock a little taller and in the lowest (12") position the trailer rides at an angle up to the truck bed (photo)so a good idea to measure closely before purchase.
the hitch arrived in 3 business days as promised via UPS. It weighing over 70 pounds I expected the cardboard box to be thrashed. The box arrived in perfect shape, great job on packaging . I immediately ran out and and began installing it on my trailer. Things went terrible, I had the white line on the collar facing forward per the video and the instructions; it just wasn't lining up when I slipped the hitch up. Plus it would not go up and seat to the king pin plate. I called customer service and they were going to have a technician call me. I started taking the collar off and that's when I discovered I had installed it upside down?? I flipped it over reinstalled it and the rest of the installation went perfect as per the instructions. If I had not of made that error the whole thing would have only taken about 15 minutes.
I felt kinda stupid because the collar is stamped this side up and has an arrow. None the less I called customer service back and told them of my error and cancelled the technician callback request.
Great product, love the additional bed space I gained by going to the turnover ball with the etrailer adapter.
Bought a truck with a heavy duty gooseneck hitch. Found a fifth wheel we wanted to buy. I ordered the CAB-C5G with 3 day shipping. It was here in 3 days! The unit was very heavy and the packaging was very well done. I read the instructions and gathered up the tools needed for the installation. We drove about 125 miles with it still in the box not knowing exactly what was going to happen. The seller and I took about a half hour to install it on the trailer and a few more minutes to adjust it in his driveway. Once we got it out on the road we noticed the trailer was front high. We took about 20 more minutes in a parking lot to make the final adjustments. My truck is a 2011 GMC 3500 single wheel so it is pretty high.
On the road we experienced no problems on the 125 mile trip home. I was a little skeptical about how this would feel going down the road but after a little while we were doing the speed limit at 70 mph on route 93 South in NH coming out of VT. We stopped after 50 miles or so to check the torque on the bolts and it was fine.
This adapter was supposed to be a short term fix until I could figure out a fifth wheel setup with the given hitch, but I think I just may like this on a longer term. With the fold over ball, I can use the bed of the truck without having to remove a big heavy hitch. This adapter is HEAVY DUTY, emphasis on heavy! Hooking up you have to have the trailer a little higher than normal to clear the ball height. Also yo do not have the luxury of the 5th wheel to guide you in if you're a little off. Mostly pros with this unit, can't come up with any cons. Great product and I would recommend it.
On time and easy installation!
Product arrived as described. Was very easy to install, took about 30-45 minutes including reading the instructions. It would be nice if the bolts to secure the hitch to the collar, as well as the bolts used to adjust the height were a standard bolt head vrs a square head. Other than that very easy & straight forward. I like this adapter much better than having the traditional 5th wheel hitch taking up room in the bed of my truck.
Ordered this prior to the arrival of my new Eagle RKS-313. The CAB-C5G was easy to install on the trailer, instructions were straight forward and easy to follow. One season under my belt with a Fifth Wheel, and it's been a Great one. Connect & disconnect are smooth and quick. With the hidden Goose in my Ram 3500, i have ample room for necessities to have a great week/weekend of camping. Very happy with my CAB-C5G!!
I purchased this adapter before the note of not to be used with air ride 5th wheel hitches was added so now I am stuck with a 50lb paper weight. Don’t be me…listen to the notes that are now attached or you will spend a half hour every fuel stop retightening the adapter so you don’t lose your rv enroute.
I searched and searched for days to find whether I wanted to go with the fifth wheel hook up or go with the gooseneck adapter to fifth wheel. I'm still glad to this day that I made this decision to go with this adapter..It's simple and easy.. Installation was a breeze, instructions & pics to a T..Ive told everyone about this product and still talking about it I definitely recommend this product!!..
Researched several products similar to this and this was the best. Received it in a few days. Exactly what I needed for my camper. Installation was easy. YouTube video was very helpful. Will recommend to anybody.
Donnie H.
9/13/2015
what is distance from rear bumper and lower front of fifth wheel. also it looks like you ,are at a skew with your adapter, is that with all the weight lowered on to the truck. if not how well does it tow like that.
John W.
9/21/2015
The space between is about 2-1/2 feet. Plenty of room. That is how my hitch sets fully, its mostly due to me running 315s on my tires. But Ive pulled it all around the south and even up to the Great Lakes. Never once had a problem
Donnie H.
9/23/2015
thankyou for your answers
I was looking to maximize the space in my bed and didn't want a heavy fifth wheel hitch to move in and out. I reached out to the pros at etrailer and they helped me pick the right setup. I chose to go with the Curt hideaway hitch and the Convert-A-Ball. I couldn't be more happy with their service and fast delivery.
Great product, heavy duty and very easy to install and adjust.
Very happy with the product and service.
It would be helpfull to me if you had a 6” convert a ball. This one is a bit to tall
Heavy built was nice to be able to not load and unload a fithwheel. Have multiple goosenecks and this pulled my 40’ camper just fine
I want to thank Etrailer for the great customer service I received. Emily H, was very helpful in the process of my purchase. The c5g _1216 converter ball adapter was a very well made and sturdy product. And will handle the 39ft toyhauler that I have it installed on. The installation was very easy and simple. So thanks again Etrailer for a great product and fast delivery, and great customer service.
Walter, R
Walter, R.
12/16/2016
When I first received it I thought it would work out. But after using it for a couple of months, I had to remove it. The ride quality was terrible and the jerky ride while towing was unbearable. Plus the additional stress it put on the frame of my fifth wheel trailer over time would cause even more problems. So I removed it and installed a Curt fifth wheel hitch and now the ride is much better and smoother with no jerkiness. Would not recommend this adapter at all.
Installation is a breeze. I'm a short but stocky guy so installing it by myself wasn't hard at all. I just lowered the trailer to where I had enough leverage to hold the adapter up and be able to tighten the bolts down with the other hand. Torqued everything down to spec and was on the road in no time. Pulled off after 50 miles and retorqued everything as any good transporter does. This is where my review gets bad. The bolts that hold the adapter to the kingpin couple failed. They crushed on the ends and damaged the threads. Keep in mind, I followed the torque specs TWICE. I didn't have the twisting issues that others have had. It took me 30 min with a pull bar and a piece of pipe to get the bolts backed off enough to get the adapter off the kingpin coupler. Today I spent 30 min working ONE bolt completely out of the adapter and this is what I found. I am in contact with etrailer to get it resolved. The bolts and the inner threads are damaged. Hopefully this is just a lemon and I will get a replacement hassle free. Other than this, this is a great design and towed well.
Joe N.
12/5/2016
Great product but the bolt crushing problem is a major one that I am working directly with Convert-a-ball to get fixed. They admit it is on their end and we are working on
I just wanted to tell the folks at etrailer how great of an experance I had ordering from them. I ordered a 5th wheel to gooseneck adapter. From the time the phone rang until Wayne had taken my order was less than 2 minutes. These people know their stuff and the price was great. The install was flawless, fit perfect. I was kept informed several times by e mail what the status of my order was. My order came a day early even during a holiday week.
I am sure glad to have some room in my p/u bed while pulling my 5th wheel.
Thanks Wayne and thanks etrailer
Walter, R.
12/2/2015
Danny I notice you have a morryde pin box on your trailer. did you change the skid plate over to the morryde RPB77006 gooseneck adapter plate. to use this adapter?
The Product installed with no problem. I just got back from a 900 mi. round trip to Utah. I was in elevations from 1000 ft above sea level to 9000 ft. above sea level. I It hooks up very easy and is very good compared the my old system. I would have given it a Excellent except that it (rotated) turned about 1/4 of an inch.on the king pin as you can see on the Photos. I will be drilling holes in the King Pin Extension and putting in the four bolts before I take it out again. I was suprised that I did not receive the optional bolts nor was I asked if I wanted them. .I did order on line so I accept responsibility for it. At no time did I feel any safty issues.
I had replaced the suspension on my trailer with the easy ride system and combined with your Convert-A-Ball Cushioned System my wife said there was a huge emprovement and I also felt a big difference it the Truck. It is a well engineered product and my raiting will go to Excellent after I put in the four Bolts. You can send me the bolts or I will get my own.
Attached are some photos of my Truck and Trailer.
The Trailer is a 2000 Forrest River Sierra Sport Toy Hauler.
I bought it new.
9200 Dry.
(2) 6500 lb Axels
1900 lb. on the Pin (est)
If Questions, Feel free to call
Have a Great Day
JoeB
Carlos G.
7/27/2014
How do you plan on installing the 4 additional bolts?
Rachael H.
7/29/2014
Joe B.
7/17/2015
I did as I said I would do and I drilled four hole in the pin box and installed four bolts. I feel much more confident in the system. I am very happy with it at this time. To drill the holes I removed the pin box and used the adapter for a pattern, I then drilled the holes by hand. 1/2 in Drill
Raymond L.
10/21/2015
Joe, what is the box length of your Ram?
Joeb
10/26/2015
Raymond L.: My Ram is a 3500 4X4 SRW It has the 8Ft bed. I pulled the same Toy Hauler with two different Quad Cab PUs over the years with 6-12 ft. beds. One 2WD and one 4X4 before this one. I ordered this P/U as a Std. Cab. It is set up like a Laramie inside. towing I get 10-13 MPG. Empty 22 MPG It tows at any speed I want in the Mountains.
I recently bought a 36ft 5th wheel toy hauler and needed a way to pull it, we didn't really want to install a 5th wheel hitch because we didn't want the extra holes in the bed of the truck so we bought this. I was nervous at first but this hitch adapter work very well. It mounted to the 5th wheel easily and sat right on the gooseneck ball that came built into our truck. It also disconnected from the truck with ease. We have left it hooked onto the camper for now for quick movement if needed.
Lindsey
11/1/2017
I am still using the goose neck adapter, I now take it off if my camper is parked for a while just to reduce stress on the front end of the 5th wheel. I would recommend!
Heavy duty, easy install
Easy install. Made hooking up real easy no hassle. Definitely make sure you get a 3/8 torques bit. They arent in the usual torques bit sets. Extremely satified with my purchase and highly recommend this setup.
James D.
5/19/2026
Thanks for the great feedback Tyrone. Easy and no hassle hookup is a win! Adding the 3/8" bit is helpful insight for others getting ready for the install. Appreciate you choosing etrailer!
I just purchased my first fifth wheel camper and have a gooseneck hitch on my truck. This adapter works great! Was easy to install on the camper, on site, with only a couple of wrenches and towing was smooth and easy. The maiden voyage was about a 3 hour trip including passing through the turbulent roads in Charleston and down the WV turnpike and I have no complaints. Highly recommend
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Condition: Surface Scratches
Notes: Minor scuffing on the bottom of unit, otherwise in like new condition.
Info for this part was:
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Keith
6/15/2025
Still holding up with zero issues.