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  1. Gooseneck Coupler
  2. Bulldog
  3. Square Tube
  4. Coupler with Inner Tube Only
  5. 25000 lbs GTW
  6. 2-5/16 Inch Gooseneck Ball
Square Tube Gooseneck Coupler, Inner Tube Only - 25K

Square Tube Gooseneck Coupler, Inner Tube Only - 25K

Item # BD0288660300
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Our Price: $251.31
Gooseneck Coupler
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Shipping Weight: 41 lbs
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Bulldog Coupler with Inner Tube Only - BD0288660300
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  • Reviews (68)
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  • Videos (2)
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Bulldog Gooseneck Coupler - BD0288660300

  • Square Tube
  • Coupler with Inner Tube Only
  • 25000 lbs GTW
  • 2-5/16 Inch Gooseneck Ball
  • Bulldog
  • Manual Latch


  • Easy hook-up and release
  • Locking handle cover protects working parts
  • Pinch bolt design
  • Fits 2-5/16" gooseneck ball
  • Outer tube not included


  • Overall length: 32"
  • Outside width: 4"
  • Thickness of tube: 1/4"
  • Limited 5-year warranty


0288660300 Bulldog Square Tube Gooseneck Coupler, Inner Tube Only - 25,000 lbs

California residents: click here

Video of Square Tube Gooseneck Coupler, Inner Tube Only - 25K

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Bulldog Inner Tube Square Tube Gooseneck CouplerSquare Tube Gooseneck Coupler Review

Ryan: Hey everybody, Ryan here at etrailer. Today we're going to be taking a look at and showing you how to install the Bulldog Square Tube Trailer Coupler. So the trailer coupler is a really important piece of equipment. You're going to want to make sure it's solid and something that you're going to be able to rely on, especially considering this is going to be the main connection point, that's actually holding our truck and trailer together.Here I'm holding our old coupler next to the new one, just to give you a comparison. There's a couple of different reasons why you would want to replace just your inner tube. For example, if you look at our old one here, you can see it's really worn out.

There's a ton of surface rust here, and that can make it extremely difficult to adjust. Sometimes these can almost kind of freeze up inside of there and more importantly, the holes where the pin would go through are elongated, so they're kind of inaudible 00:00:59 out. That's going to allow this to have a ton of play and slop in it and that's what you don't want. You want everything to be nice and tight and reliable.Also, a lot of times the mechanism here and your handle can lock up on you, make it really difficult to operate. So really just over time, these things get weathered and worn out and it's good to replace them because if you think about it, this is a really critical component, that's actually pairing our trailer to our truck.

And that's where this Bulldog coupler is really going to come into play.Extremely heavy-duty and this is something you know you're going to be able to count on. Just by taking a quick look at it, you can tell it means business, super thick, heavy-duty, made from all steel. We even had a customer say they made it through a few hurricanes with this and it still functions like it did on day one and I could see how that's possible. Really a simple coupler, that's one of the things I like about it. You don't have a ton of different bells and whistles and things to go wrong, the simplicity.

You know it's going to function the way it should and you know it's going to do that for a long time.So the way it's going to work, really simple, our handle here is going to determine if this is locked or unlocked. Right now it's in that closed or locked position. Whenever we're hooked up to our trailer, this is how it's going to be pointed, down the road. So it's going to fit in there nice and tight. You won't have to worry about a lot of jarring and things of that nature.

Whenever you're ready to drop your trailer or hook up to it even, all your going to have to do, is grab this big handle, pull up, rotate it, it'll lock it into place. That way, when you get lined up with your ball, you can put it back into that lock position. So it's a spring loaded, it's going to take a lot of force to open it, not so much that it's unmanageable, but this isn't accidentally coming undone, more or less what I'm trying to say. The handle's nice and big so even in that cold icy weather, you got a big old pair of gloves on, you're able to grab it easily and operate it.What's cool too, is there's going to be a couple little holes here. So what you could do is put a padlock there or something, and that's going to stop people from being able to undo your trailer. If you're really not worried about security, as far as theft and things of that nature goes, you could always take a pin or bolt or something even, run it through there and that's just going to give you a little bit of extra security, knowing that for whatever reason, if this does happen to come off, it's not going to disconnect, that pin is going to stop it. So nice just to have the extra anti-theft and safety feature available.This coupler is going to work with a few inaudible 00:04:02 balls that are two and 5/16 inaudible 00:04:05 inch, and it's going to have a 25,000 pound maximum weight capacity, so pretty high number there. But at the end of the day, coupler you really can't go wrong with, if you need to replace yours, this has got to be a perfect choice. Not all these bells and whistles, really heavy duty, you know it's going to work and last you for a long time.So if you take a look at our new coupler, right away you're going to be able to tell, super heavy duty and it's going to be extremely reliable. The steel is very thick, very strong, and it's going to have a four inch by four inch size two. So really common size and should work well with a ton of different applications. It's going to be pretty much direct replacement for the most part. If you look on the side, we're going to have four holes here and that's going to allow us to adjust either up or down to best match up with our truck. But other than that, everything's relatively straightforward. So let's go ahead and get this installed. And just a quick tech tip before we put this in, it's going to arrive like this just bare metal.So I would highly recommend maybe getting some spray paint and putting a nice layer of paint on this, just to help prevent any of that surface rust that can accumulate. It's going to help keep it in better shape for a little bit longer and make it look a little bit better too. I will say, might not be a bad idea even to take some anti-seize and maybe apply it on the sides too, after you paint it, that'll just help this from seizing up, it'll help keep it a little lubricated. But with that being said, let's go ahead and pop this in.So we're going to take our coupler here, line it up with the existing housing and push it up into place. So once we get our coupler inside of her housing and we lined up the pin that we want to use to set that proper height, what we're going to do is take the included bolt. And I'm actually using an additional washer just to help cover up that little bit larger hole that was originally there. You can pick these up at your local hardware store. We'll just pass that through, then on the other side of the bolt, I am going to secure it using another one of those flat washers and the included lock nut. So just get this hand tight for now. Then I can come back and snug it down. And be sure to torque down the hardware, according to the manufacturer specifications. So once it's torqued down, you're ready to hook your trailer up to your truck and try it out. And that'll finish up our look at and our installation of the Bulldog Square Tube, Gooseneck Trailer Coupler..

Customer Reviews

Square Tube Gooseneck Coupler, Inner Tube Only - 25K - BD0288660300

Average Customer Rating:  4.9 out of 5 stars   (68 Customer Reviews)

- BD0288660300

Ordered over the phone. Customer service was perfect. Made it very easy to order the product and kept me informed during delivery

- BD0288660300

Good strong hitch at a great price and shipping was fast.

- BD0288660300

Caroline helped me out with my order, t hanks!

- BD0288660300

excellant people to do business with

- BD0288660300

This product was easy to find and gave all dimensions so that I knew I was ordering the right part. It was easy,reasonably priced and arrived timely. It installed with ease and is just what I was looking for. Thank you etrailer guys

It is working well and I appreciate your concern and follow up. I will defiantly use your products in the future as the need arises. Be well and thanks again.
Pete A - 09/21/2018

- BD0288660300

Great customer service!

- BD0288660300

Well built solid construction very happy with it

- BD0288660300

Product works as intended, until someone backs into it incorrectly and bends the pin. Newer version of the adapter with a clam shell lever system works much better!

- BD0288660300

The whole process was very smooth and professional.The item I ordered got to me a day earlier than expected. Great tracking also

- BD0288660300

Great job !!!

- BD0288660300

Very nice gooseneck coupler. Fit perfectly in my Kaufman Mini 5 trailer. Welds were very good quality. Built by someone that knows what they are doing

- BD0288660300

Great love it but I didn’t get a receipt

- BD0288660300

we got it and already installed it and it worked great with a little modification cause the trailer we had to put it on was weird but we made it work and its just perfect thanks for the quick delivery

- BD0288660300

was able to change just my worn out part on my goose neck. Part wasn't exactly the same but worked just fine. No more banging back and forth when stopping and going.

- BD0288660300

Coupler arrived as ordered ups took a day longer than planned sales staff are awsome great product

Ahter a year and many thousands of miles on our 4 place car hauler the goose neck is in as new condition. Great product and service
Greg - 04/06/2020

- BD0288660300

great product !! quick shipping !!!

- BD0288660300

ups delivered the Bulldog gooseneck inner coupler today to replace the worn out coupler on the flatbed trailer. Within a short time the coupler was installed. It fit perfectly. Etrailer has great customer service. Our friends at Ups delivered the coupler quickly. Larryi

Larry R - 12/10/2016

- BD0288660300

My gooseneck ordered on Wednesday delivered Friday very quick for free shipping and a very good price opened hitch looks great Haven’t got to install yet

- BD0288660300

Part was exactly what I needed worked great quick delivery

- BD0288660300

The part was delivered before on time and when I broke it out of the box it went in perfectly as it should! There were no burs or any fabricating this part. It was exactly what I ordered!

still holding strong! Been through hurricane Harvey, hurricane Irma and about to go through hurricane Florence
Harry S - 09/16/2018

- BD0288660300

great product Fast shipping Thanks

- BD0288660300

Great service, faster than expected with delivery with the a holiday and all. The part fits perfectly and looks as good or better than the old one. I'll use this site again for trailer parts. Thanks !

- BD0288660300

Great product will use etrailer again

- BD0288660300

Fit perfectly was just what I needed, I like how it was ready to paint with the stickers already taped off. I mounted it on the trailer painted it black then peeled off the tape to show the stickers underneath works smoothly great quality.

- BD0288660300

Purchased this for my Kaufman 3 car hauler. Works/fits as needed.

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Info for this part was:

Employee DeAnne T
Written by:
DeAnne T
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Joshua S
Video by:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
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:
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Employee Cole B
Installed by:
Cole B
Employee Ryan G
Installed by:
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