1. Gooseneck and Fifth Wheel Adapters
  2. Bulldog
  3. Gooseneck Trailer to Fifth Wheel Hitch
  4. Replaces Inner Tube
  5. 25000 lbs GTW
  6. Gooseneck Coupler Adapters
Bulldog Gooseneck-to-5th-Wheel Trailer Coupler Adapter - Inner Tube - Round - 25,000 lbs

Bulldog Gooseneck-to-5th-Wheel Trailer Coupler Adapter - Inner Tube - Round - 25,000 lbs

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Gooseneck and Fifth Wheel Adapters
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Gooseneck and Fifth Wheel Adapters BD0289640300 - Gooseneck Trailer to Fifth Wheel Hitch - Bulldog
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Pull your gooseneck trailer with a fifth-wheel hitch by installing this round gooseneck-to-king-pin adapter. Inner tube fits most standard, round gooseneck coupler outer tubes. Call 800-298-1624 to order Bulldog gooseneck and fifth wheel adapters part number BD0289640300 or order online at etrailer.com. Free expert support on all Bulldog products. Guaranteed Lowest Price and Fastest Shipping for Bulldog Gooseneck-to-5th-Wheel Trailer Coupler Adapter - Inner Tube - Round - 25,000 lbs. Gooseneck and Fifth Wheel Adapters reviews from real customers.
  • All Info
  • Reviews (288)
  • Q & A (31)
  • Photos
  • Why etrailer?

Bulldog Gooseneck and Fifth Wheel Adapters

  • Gooseneck Trailer to Fifth Wheel Hitch
  • Replaces Inner Tube
  • 25000 lbs GTW
  • Gooseneck Coupler Adapters
  • Bulldog
  • Adapts Trailer
  • Adjustable Height
  • Round Tube

Pull your gooseneck trailer with a fifth-wheel hitch by installing this round gooseneck-to-king-pin adapter. Inner tube fits most standard, round gooseneck coupler outer tubes.


Features:

  • Gooseneck-to-5th-wheel adapter lets you tow your gooseneck trailer with a 5th-wheel hitch
  • Round inner tube fits most standard, round gooseneck outer tubes
  • Direct replacement for inner tube on Bulldog gooseneck-to-5th-wheel coupler adapter (BD0289580300 - sold separately)
  • Adjustable-height, 4-hole design
  • Durable steel construction
  • Raw finish


Specs:

  • Application: outer tubes with 15-degree offset pin holes
  • Range of vertical adjustment: 8"
    • 2-11/16" From center of hole to center of hole
  • Tube diameter: 4"
  • Weight capacity: 25,000 lbs
  • Pin hole diameter: 7/8"
  • Plate measures 11" x 14"
  • 3-Year limited warranty


0289640300 Bulldog Round Pin Gooseneck Adapter Inner Tube

Item # BD0289640300




California residents: click here



Customer Reviews

Bulldog Gooseneck-to-5th-Wheel Trailer Coupler Adapter - Inner Tube - Round - 25,000 lbs - BD0289640300

Average Customer Rating:  4.7 out of 5 stars   (287 Customer Reviews)

Pull your gooseneck trailer with a fifth-wheel hitch by installing this round gooseneck-to-king-pin adapter. Inner tube fits most standard, round gooseneck coupler outer tubes.

- BD0289640300
by:

Ordered on Friday afternoon and received the following Tuesday. Very simple installation. No longer have to crank the gooseneck up or down to connect to truck. Very satisfied with this product and the price was very reasonable.


Comments
Still loving it. Hook up is so much easier
Dean B - 03/28/2021


- BD0289640300
by:

I'm well satisfied with the adapter, shipping and overall experience with etrailer. The link you emailed to track the order worked great. The adapter seems very well constructed.



- BD0289640300
by:

The bulldog gooseneck to 5th wheel adapter has saved me time. It make leaving the 5th wheel in my truck a reality. Now my travel trailer and equipment trailers are all 5th wheel connections. Back under to connect, simple. They tow smoothly with less jerking. It is bare metal, so paint to match.


Comments
A year later, painting the bulldog adapter was a wise choice. No rust has formed because I primed and applied a topcoat black finish of rust inhibiting paint. Ease of use, speedy trailer connection, and the stability the fifth wheel brings to my towing is unmatched. Highly recommend this for anyone interested in fifth wheel towing. The gooseneck connection in my truck bed hasn’t been used since I change the trailer connector and it’s been wonderful.
Travis - 08/29/2021


- BD0289640300
by:

excellent product performs as needed . like it so well we just left it on trailer to only use with tractor.Would like to even look into changing pickup over to fifth wheel so it would be easier to hook up trailers with loads.The only issue I had was a small bead that was on the inside of trailer tube that hindered insertion of hitch.Would definitly do it again. We put it on flat bed gooseneck trailer to use with semi so it would free up pickup


Comments
product is still performing well makes hooking up gooseneck so much easier
Greg H - 05/04/2021


- BD0289640300
by:

My expectation when I unboxed the unit was that it would be a brand new unit. This unit looks like it had been made up and peicemealed from random gooseneck parts. I am reluctant to use this unit because I am questioning the workmanship of the welds.


Comments
I reached out to my contact at Bulldog and sent him the photos of your coupler adapter. Based on the photos, my contact confirmed that this coupler is per their prints for the product. This coupler has a raw finish so that the end user can paint it to match the trailer. Because there is no paint or primer on the coupler, surface rust can occur and would need to be cleaned off before painting.
-- Etrailer Expert Victoria B - 10/15/2019


- BD0289640300
by:

The adapter is really well built. The welds are great and the raw material was easy to paint. The problem I encountered was the fourth and lowest adjustment hole could not be reached due to the four pieces of triangular support stock hitting my Big Tex trailer neck tube before the hole would line up for the pin. So I had to take my cutoff wheel and trim 1/2” off those four pieces of triangular support metal so the adapter would go up further in the neck and the pin could be inserted. I hate working on new equipment but it’s easier than returning it and losing time.



- BD0289640300
by:

Great product. Very well built. I am a farmer and use it to hook up a goose neck trailer to our semi. We use the trailer to haul hay, machinery, or even cattle. What's great about this product is that you can move it from trailer to trailer. This adapter will fit in a gooseneck trailer with the pin running through the side or with the bolts on the front. Overall great product for the farm.



- BD0289640300
by:

I have ordered alot from etrailer and always been pleased , last week I ordered a 5th wheel conversion for my gooseneck trailer then went outside and literally cut my gooseneck hitch off , i then got a call from etrailer saying the part I ordered was backordered and was not available .while I was disappointed I was so glad called me immediately and was able to come up with a alternative . Great customer service ,I can not say enough great things about etrailer



- BD0289640300
by:

Works great. Now I don’t have to use the tractor to pull the heavy B&W hitch with the pog system everytime I need to pull the gooseneck. I did have to drill the holes for the pin since the coupler was not a bulldog brand. Pulls better on the king pin than the gooseneck ball also. Great price. Will shop again soon.



- BD0289640300
by:

Bought this so my wife could load and unload our 30' flatbed easier. The gooseneck required her to climb into the bed and was hard for her to line up. This adapter installed in less than 60 seconds and has made her new career as a hot shot driver that much more enjoyable. I couldn't be more happier.



- BD0289640300
by:

Worked like a charm, haul for a living and slides right in every circle gooseneck hitch. Only recommendation for company for buyers is to clear coat it because when not in use it will surface rust with in a couple days. Otherwise affordable quality buy!



- BD0289640300
by:

Product that I ordered was out of stock at the time so they suggested I ordered this part when I received the part the holes didn't line up with bolts in my trailer so I called about it and they said I can send it back but they refused to pay for shipping or give me a credit for shipping amount which is 45$.. sent me a replacement part AGAIN and the holes on it was drilled in diagonal totally unusable offered to pay for shipping on second part but not the first one even though it's not the one I ordered in the first place didn't want me to speak to a supervisor or manager.. definitely will not be using these people again....i paid 45$ to be ripped off



- BD0289640300
by:

First trip the king pin was not welded properly and came off. I now have a damaged truck and trailer. I expect a full refund for the hitch. I also will be speaking with an attorney to see what my options are.


Comments
I will have our customer service team reach out to you. The coupler does have a three year warranty.
-- Etrailer Expert Jenny N - 12/06/2021


- BD0289640300
by:

The item itself was fine, I would have given it 5 stars but for the shipping. It was improperly packed for shipping it was put in a giant thin box with 1 piece of wrapping paper and with all it’s bouncing around it had ripped big holes in the cardboard box. It actually rolled out through the side when the delivery guy picked it up hitting his leg leaving it bleeding.



- BD0289640300
by:

Quality construction and materials and a perfect fit to convert my gooseneck coupler from ball to kingpin.



- BD0289640300
by:

I bought a fifth wheel camper trailer and mounted a B&W Companion hitch onto the gooseneck hitch in the bed of my truck. It is such a pain to take in and out, so I bought one of these for my horse trailer to see how they work. They work great, so great in fact that I bought two more for my stock trailer and flatbed trailer. The only negative I have is that the holes in the sides of the pipe for bolts, pins, etc., are not located 90 degrees from the front of the hitch plate and therefore will not line up with the holes in most receivers on the trailers. They are apparently drilled before the plate is welded on, because none of the three I bought are in the same relationship to the front of the plate.


Comments
I love these adapters. They make it possible to use my truck's 5th wheel hitch for my rv trailer, stock trailer and flat bed trailer (plus, they are much easier to hook up than the gooseneck hitch was). I would recommend these adapters to anyone. Thank you for checking back with me. I am very pleased with the service your company has given me over the years.
Larry L - 04/18/2018



- BD0289640300
by:

This item is ONLY for Bull Dog tubes requiring a 15 degree offset. I did not know this until after putting it in my none Bull Dog tube (I have a Lippert chassis). Tested after installation and the offset was so pronounced that it caught on my receiver. Talked with manufacturer's technical expert, and he said that the industry standard is 15 degrees. Regardless, the adapter is expertly fabricated and of good strong steel. Just wish it worked for my trailer. etrailer.com was very good trying to resolve my concern to point Donna spent a lot of time researching a solution for me. Ultimately I shipped back the adapter because it was not doable for me. We both learned a lot today about trailers and the limitations on Bull Dog adapters.


Comments
Ended up paying a welding shop to cut and welding it in place because it hung down too much on the lowest setting putting stress on rear axle. Fixed the receiver plate 15 degree offset by cutting the plate off the tube removing the 15 degrees. Glad the Bull Dog was a raw product which allowed modification. Spent an extra $150 in mods to get what I needed.
Michael - 12/20/2018



- BD0289640300
by:

This is the third adapter I have purchased from etrailer. One for my horse trailer, one for my dump trailer and now one for my equipment trailer. A little bit of time to paint and install and everything is fine. No more climbing in the pickup bed to hook and unhook, no chains to deal with. I prefer the 5th wheel to the ball gooseneck, much easier hook up when you can't see the ball in the bed of your truck. Quality is very good and they work. You won't find it cheaper anywhere else and they always ship quick.


Comments
Still doing what they are supposed to do and holding up very well. No complaints.
JOSEPH H - 03/23/2018



- BD0289640300
by:

Worked perfect thought fitment might be an issue but it slid in perfect and gets the job done very satisfied especially considering the price would definitely recommend if switching from a gooseneck to a fifth wheel



- BD0289640300
by:

Looks good, it’s exactly what I needed to get our living quarters trailer ready to pull with the Pete .



- BD0289640300
by:

The holes through the round tube insert for pinned height adjustment are not at a right angle to the square plate. I am not sure if it's designed that way on purpose or not. I would have thought it would have went exactly cross ways and not at an angle? The pictures look like the holes are for the pins to go straight thru from the side. I will not be using this feature at this time but maybe in the future. It's welded great and not warped and appears square in good shape but does have some rust. Primer at min would be helpful. It arrived very quickly about 2 travel days plus the weekend, 1 day ahead of schedule. This should solve the problem of leaning/ rolling trailer on the goose neck ball for high leverage loads by converting to anti sway 5th wheel set up.



- BD0289640300
by:

I own a small transportation company and needed a way to minimize hookup time for one my drivers that primarily pulls fifth wheels hookups. We bought a 30 ft gooseneck trailer and found we needed a faster solution. We reached out to etrailer and they had solution that worked perfectly. Also, we were able to get our hitch conversion within 3 days limiting our downtime. I will buy from these guys again!!!! Excellent service....



- BD0289640300
by:

I just put it on yesterday and it was a very easy install (about 5 Minutes). I hooked my truck up with no problems. I wanted to use my gooseneck trailer without having to pull my heavy B&W companion fifth wheel out of my truck bed. Mission accomplished.



- BD0289640300
by:

First time buyer. Amazing customer service. Got my king pen adapter will order from here again Chris J did an excellent job



- BD0289640300
by:

It was delivered right on the day it was suppose to.


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    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
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