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

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

Part Number: BD0289580300
In Stock
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$279.24
Retail:$318.75
You Save: $39.51
5th Wheel Gooseneck Adapter
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Pull your gooseneck trailer with a fifth-wheel hitch by installing this round king pin adapter. Simply replace both the inner and outer tubes of the gooseneck with this unique coupler and you're ready to tow. 1-800-940-8924 to order Bulldog 5th wheel gooseneck adapter part number BD0289580300 or order online at etrailer.com. Free expert support on all Bulldog products. Great prices and Fastest Shipping for Bulldog Gooseneck-to-5th-Wheel Trailer Coupler Adapter - Round - 25,000 lbs. 5th Wheel Gooseneck Adapter reviews from real customers.
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  • Reviews (362)
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Bulldog 5th Wheel Gooseneck Adapter - BD0289580300

  • Gooseneck Trailer to Fifth Wheel Hitch
  • Replaces Inner and Outer Tubes
  • Gooseneck Coupler Adapters
  • Bulldog
  • 25000 lbs GTW
  • Adapts Trailer
  • No Offset
  • Adjustable Height

Pull your gooseneck trailer with a fifth-wheel hitch by installing this round king pin adapter. Simply replace both the inner and outer tubes of the gooseneck with this unique coupler and you're ready to tow.


Features:

  • Gooseneck-to-5th-wheel adapter lets you tow your gooseneck trailer with a 5th-wheel hitch
  • Unique coupler fits the same as a gooseneck coupler with inner and outer tubes
  • Sturdy, load-bearing pin and 2 set bolts included
  • Durable steel construction with raw finish for welding
  • Adjustable to fit your application


Specs:

  • Retracted height: 23-1/3"
  • Extended height: 31-1/3"
  • Range of adjustment: 8"
  • Outer diameter of inner tube: 4"
  • Plate dimensios: 14" long x 10-7/8" wide
  • Capacity: 25,000 lbs
  • Limited 3-year warranty


Dimensions of coupler plate

Note: This coupler replaces both the inner and the outer tubes. A professional will need to remove the original coupler and weld on the new coupler.



0289580300 Bulldog Kingpin to Gooseneck Adapter - Round




California residents: click here


Customer Satisfaction Score:


Customer Reviews

Bulldog Gooseneck-to-5th-Wheel Trailer Coupler Adapter - Round - 25,000 lbs - BD0289580300

Average Customer Rating:  4.7 out of 5 stars   (362 Customer Reviews)

Pull your gooseneck trailer with a fifth-wheel hitch by installing this round king pin adapter. Simply replace both the inner and outer tubes of the gooseneck with this unique coupler and you're ready to tow.

by:

I bought a used trailer and wanted to replace the gooseneck coupler and redesign the frame connection. I had a number of goals in this replacement.
1) Extend radius of the frame neck. Was 73in increased to 90in.
2) Move frame connection to a lower area of tube.
3) Increase surface area frame contacts tube and add collars to tube for increased surface area for cross tube pin.
4) Convert from gooseneck to fifth wheel style connection but allow revert back if wanted.
5. Add cover over top of tube to shed water from entering tube sections. (4in PVC pipe cap with a little dremel work fits great)
6. Replace safety chains with weld on chain mounts to frame. Allow chain replacement without welding chain to frame.
7. Provide covered area for safety chains and wiring to avoid weather.

After much welding and fitting the new tube and post insert are finished and painted. I am very pleased with the quality of the items from etrailer and will be placing more orders in the future for trailer parts.



by:

Perfect for the job if you’re switching from the regular gooseneck hookup to a semi truck fifth wheel set up. Shipping was accurate & I love my adapter! Very easy to attach & real neat finish to paint it whatever color you would like to.



by:

the Bulldog was the perfect fit for our trailer. thank you for your dedicated service in getting the parts correct and them delivered promptly!



by:

Only reason I didn’t give it 5 stars is due to inadequate packaging and it comes without paint/primer. No damage due to packaging. Easy enough to paint after receiving. Like this brand for the bigger surface area on fifth wheel compared to others. Well made and quality welding.



by:

Great workmanship, quality product, great investment….



by:

A very solid piece of equipment.



by:

Wow needed it asap and they didn't let me down .product was perfect and customer service out standing can't wait to show the build thank you



by:

Works great, came without paint.



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by:

I ordered the Bulldog adapter because I believe their quality is good. The construction of the Bulldog hitch adapter was good. However, the 4” tube was not perfectly round, approximately.030 out of round. This shouldn’t have been an issue, but since my trailer is used and had a Temco hitch originally, the tube wouldn’t slip in. I chucked the Bulldog in the lathe and skimmed .030 of the diameter and it went right in. This review is not written to criticize Etrailer or Bulldog. Just be aware if you’re working with a different brand hitch other than what is listed, there is a possibility of fitment issues.



by:

I ordered this product and received it 3 days later, I took about 1 hour to remove the gooseneck tube and install this one and get the height set for towing, removed it once again and painted it due to it being bare metal. So far this seems to be a quality product.



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.



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.



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.



by:

Great product, fast shipping, excellent communication, definitely recommend these guys!!

We painted the square tube/king pin tube red and installed it. Works great, but there is not much of it to see in the pic. Take my word, well built & very heavy duty!!



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!



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



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.



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.



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.



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



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.



by:

This product fit perfectly on my dump trailer. Excellent product.



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.


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See what our Experts say about this Bulldog 5th Wheel Gooseneck Adapter

  • Do I Need to Replace the Outer Tube on Gooseneck Trailer to Use Bulldog 5th Wheel Adapter
    The specific Bulldog Gooseneck to 5th Wheel Adapter, # BD0289580300, that you found is actually both the inner and outer tube. If you only need the inner tube, then you will want part # BD0289640300. This is just the inner tube that will give you the adapter without replacing the outer tube welded to your trailer frame.
    view full answer...
  • Does Bulldog Gooseneck to Fifth Wheel Adapter Need Pin Hole
    Hey Jake, so you would need to use the pin hole that the adapter has so since your setup doesn't have that I would instead recommend the part # BD0289580300 which comes with it's own outer tube that has a matching pin. You could add the hole to your setup if you really wanted to though.
    view full answer...
  • What is the King Pin Diameter on the Bulldog Gooseneck to 5th Wheel Hitch Adapter
    The standard king pin dimension for a semi-trailer is 2 inches diameter, where the fifth-wheel jaw wraps around the king pin. I went out to the etrailer.com semi-trailer on our lot, see link, and produced a short video showing both of the king pins in close proximity to each other for you to see. The king pin on the Bulldog Gooseneck-to-5th-Wheel Trailer Coupler Adapter, # BD0289580300, is an industry standard 2 inch king pin and will work in a semi-tractor fifth-wheel hitch, as long as...
    view full answer...
  • Orientation Of Bulldog Gooseneck To 5TH Wheel Adapter On Trailer and Lube Plate Recommendation
    The Bulldog Gooseneck-to-5th-Wheel Trailer Coupler Adapter - Inner Tube # BD0289640300 is designed to be a replacement for their Bulldog Gooseneck-to-5th-Wheel Trailer Coupler Adapter # BD0289580300 which does have the pin hole located 15 degrees off center of your 90 degree coupler. If you were to drill new holes for your specific trailer that has the pin holes at 90 degrees this will cause the warranty to be void due to modification of the product by someone other than the manufacturer....
    view full answer...
  • Can the Bulldog BD0289580300 be Bolted on to a Trailer?
    The outer tube of the Bulldog Gooseneck-to-5th-wheel adapter # BD0289580300 should be welded into place. With the outer tube only having 2 bolts, it will not have enough capacity to hold everything in place.
    view full answer...
  • What's Needed To Tow 5th Wheel RV with a 2015 Peterbuilt Semi?
    You'll need to add a 7-way RV connector with # ETBC7, and # 18002, and an electric brake controller like # 90195. The 7-way round you have now has separate turn signal and brake signal wires, which the RV 7-way does not. We've found the easiest way around this is just a new 7-way install kit and and universal 4 way to completely bypass your existing wiring. Also 5th wheel trailers use a standard 5th wheel king pin, which is probably what your Peterbilt is setup for, but if in the off chance...
    view full answer...
  • How To Tow Fifth Wheel And Gooseneck Trailers With A Gooseneck Hitch On A 2006 Chevy Silverado
    If you are wanting to use the B and W gooseneck hitch that is in your 2006 Chevrolet Silverado you will have to use the 5th Airborne Premium Fifth Wheel Air Ride Coupler, part # 5AB-S500-700, with a Draw-Tite Hi-Rise Gooseneck to Fifth Wheel Trailer Hitch, part # 9480. The 5th Airborne standard king pin has a 21,000 lbs. weight capacity and will attach to your Fabex 520 pin box. The Draw-Tite Hi-Rise adapter will attach to your B and W gooseneck hitch and give you a fifth wheel hitch...
    view full answer...
  • Towing a Gooseneck Trailer with Two Different Trucks with 5th Wheel Trailer Hitches
    First, 5th wheel hitches accept an industry standard king pin size which is what is on the Bulldog gooseneck to 5th wheel adapter, # BD0289640300. So it will fit both 5th wheel hitches. Next, this is an inner tube of a gooseneck coupler. It will fit in place of a 4 inch diameter round inner tube on a gooseneck trailer. It does not fit over the existing tube. It is height adjustable with 4 height settings to compensate for the differences in height between trucks. You can also adjust the...
    view full answer...
  • Recommendation for a Gooseneck to Fifth Wheel Trailer Hitch Adapter for a 2006 Dodge Ram
    It sounds like you need a Gooseneck to fifth Wheel adapter like # KPG5-Q25-IP. This 4 inch outer diameter square tube will fit as an inner pipe on most standard gooseneck outer tubes. The overall length is 34-3/4 inches. We also have a round adapter that has an extend height of 31-5/16 inches, # BD0289580300.
    view full answer...
  • Can Bulldog Gooseneck-to-5th-Wheel Trailer Coupler Adapter Fit Any Brand Gooseneck Trailer
    Hey Marvin, thanks for reaching out! The Bulldog Gooseneck-to-5th-Wheel Trailer Coupler Adapter # BD0289580300 is designed to be welded on to the trailer so your old coupler will need to be cut off and you'll need a professional to weld this one on. So this will technically work with any brand trailer, yes.
    view full answer...
  • Adapting Gooseneck Trailer for Towing with a Single Axle Tractor Truck
    Without knowing the exact nature of your existing trailer and how the coupler attaches to the trailer, I can't prove a specific adapter, but I can show you what we offer. We offer many different adapters that would replace the coupler on your Gooseneck trailer if it has a square or round tube coupler. I've linked you to the adapters we offer. To choose the correct one, you'll need to know the inner diameter of the outer tube that the existing coupler slips into. Also, you'll need to know...
    view full answer...

Do you have a question about this 5th Wheel Gooseneck Adapter?


Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Robert G
Expert Research:
Robert G
Employee John H
Expert Research:
John H
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C
Employee Hannah L
Updated by:
Hannah L
Employee Andy C
Installed by:
Andy C

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