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Pull your gooseneck trailer with a fifth-wheel hitch by installing this square 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:
Specs:
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.
California residents: click here
Average Customer Rating: 4.7 out of 5 stars (354 Customer Reviews)
Pull your gooseneck trailer with a fifth-wheel hitch by installing this square king pin adapter. Simply replace both the inner and outer tubes of the gooseneck with this unique coupler and you're ready to tow.
Would bot fit onto my big tex trailer!
It is as advertised. Heavy built. Great construction. Welds are burned in properly. I built a bumper pull to 5th wheel conversion for our camper and it worked great. I highly recommend.
I am well pleased with the quality of this product. I used it when modifying my gooseneck to a fifth wheel.
Product looks good, was delivered as promised. I specifically ordered the heavier unit for my trailer as the hitch is the weak point in the final connection.
Good product hooks on good to my truck and my semis trucks
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.
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.
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!!
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.
This product fit perfectly on my dump trailer. Excellent product.
the Bulldog was the perfect fit for our trailer. thank you for your dedicated service in getting the parts correct and them delivered promptly!
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.
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.
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.
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.
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.
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
worked great
Piece showed up as advertised and looks well built. Thank you for the quick shipping.
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.
Do you have a question about this Gooseneck and Fifth Wheel Adapter?
Info for this part was:
At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Katrina B.
12/21/2022
I am sorry to hear that this is not working for your application. Our customer service department will be getting in touch with you about a return label.