Gooseneck Couplers
Gooseneck Couplers
GN5 Round Straight Kingpin Coupler
For trailers with 4″ ID round tube
Our Part measures 4″ outside diameter. Make sure it will fit as many of the China made tubes are not all sized consistently and many are under sized. PopUp will assume no responsibility for returns when incorrect measurements are taken. Please see return policy.
Pull your gooseneck trailer with a semi-tractor or pickup mounted fifth wheel.
Simply replace the coupler with a king pin. Easily switch back and forth.
2″ SAE king pins are the industry standard and are suitable for use in all over-the-road applications.
GN5 Straight Kingpin Coupler for Reliable Towing Performance
Popup Hitch manufactures the GN5 Round Straight Kingpin Coupler for individuals who need a reliable way to tow a gooseneck trailer with either a semi-tractor or a pickup equipped with a fifth-wheel hitch. We designed this coupler to give you a straightforward, heavy-duty towing solution that installs cleanly and performs with confidence on the road. We build every towing product in-house with strict quality checks, and we stand behind our work with dependable support you can count on.
Effortless Gooseneck to Kingpin Conversion with the GN5
The GN5 lets you effortlessly replace your gooseneck coupler with a standard kingpin, allowing your trailer to hook up directly to a fifth-wheel hitch, no need for a new trailer or oversized adapter. Our design offers a straightforward, secure upgrade that maintains the strength and reliability you expect while giving you greater flexibility for your towing setup. It’s a smart solution built for convenience, performance, and long-term dependability.
Rugged Coupling Solutions for Demanding Loads
At Popup Hitch, we offer the GN5 Round Straight Kingpin Coupler that delivers superior durability and strength where it matters most. We build every GN5 to handle real work:
- Rated at 30,000 lbs. for serious towing.
- Standard 2″ SAE kingpin for over-the-road compatibility.
- 10″ round bolster plate on an 18″ tube for stable support.
- 7/8″ through-holes for secure pinning.
- Durable black powder-coat finish for corrosion resistance.
We’ve engineered it to fit snugly and perform reliably under tough towing conditions. Our design ensures easy installation, saving both time and hassle on the road. We include easy-maintenance features because we know downtime isn’t an option.
Contact us today to ensure you’re set up right, so you can tow smoothly and with total peace of mind.
- For trailers with 4″ ID round tube
- Durable Black powder coat finish.
- Rated at 30,000 lbs
- Standard S.A.E. king-pin with 10″ round bolster plate fitted to 18″ long square or round tube.
- Fits standard gooseneck trailer coupler tubes.
- 7/8″ holes thru both sides
| 5 star | 0% | |
| 4 star | 0% | |
| 3 star | 0% | |
| 2 star | 0% | |
| 1 star | 0% |
Sorry, no reviews match your current selections
For trailers with 4″ ID round tube
Our Part measures 4″ outside diameter. Make sure it will fit as many of the China made tubes are not all sized consistently and many are under sized. PopUp will assume no responsibility for returns when incorrect measurements are taken. Please see return policy.
Pull your gooseneck trailer with a semi-tractor or pickup mounted fifth wheel.
Simply replace the coupler with a king pin. Easily switch back and forth.
2″ SAE king pins are the industry standard and are suitable for use in all over-the-road applications.
GN5 Straight Kingpin Coupler for Reliable Towing Performance
Popup Hitch manufactures the GN5 Round Straight Kingpin Coupler for individuals who need a reliable way to tow a gooseneck trailer with either a semi-tractor or a pickup equipped with a fifth-wheel hitch. We designed this coupler to give you a straightforward, heavy-duty towing solution that installs cleanly and performs with confidence on the road. We build every towing product in-house with strict quality checks, and we stand behind our work with dependable support you can count on.
Effortless Gooseneck to Kingpin Conversion with the GN5
The GN5 lets you effortlessly replace your gooseneck coupler with a standard kingpin, allowing your trailer to hook up directly to a fifth-wheel hitch, no need for a new trailer or oversized adapter. Our design offers a straightforward, secure upgrade that maintains the strength and reliability you expect while giving you greater flexibility for your towing setup. It’s a smart solution built for convenience, performance, and long-term dependability.
Rugged Coupling Solutions for Demanding Loads
At Popup Hitch, we offer the GN5 Round Straight Kingpin Coupler that delivers superior durability and strength where it matters most. We build every GN5 to handle real work:
- Rated at 30,000 lbs. for serious towing.
- Standard 2″ SAE kingpin for over-the-road compatibility.
- 10″ round bolster plate on an 18″ tube for stable support.
- 7/8″ through-holes for secure pinning.
- Durable black powder-coat finish for corrosion resistance.
We’ve engineered it to fit snugly and perform reliably under tough towing conditions. Our design ensures easy installation, saving both time and hassle on the road. We include easy-maintenance features because we know downtime isn’t an option.
Contact us today to ensure you’re set up right, so you can tow smoothly and with total peace of mind.
- For trailers with 4″ ID round tube
- Durable Black powder coat finish.
- Rated at 30,000 lbs
- Standard S.A.E. king-pin with 10″ round bolster plate fitted to 18″ long square or round tube.
- Fits standard gooseneck trailer coupler tubes.
- 7/8″ holes thru both sides
Made in America
What our customers are saying
“This is a 2019 Ford F-150 with 5’5” bed. I was worried about finding a product to get the clearance I needed to pull my horse trailer . My trailer is almost 79 inches wide . Installed the SB116 16” inch extension coupler on my trailer and I’ve pulled it several trips now and it works great. My trailer pulls great due to load is on the truck where it needs to be. Very well made and love the fact I don’t have to get up in the back of truck or reach over the bedside to hook up and unhook. The folks at PopUp Towing were great to deal with and answered all my questions.”
- Mark G.
“We installed a CAG (Connect-Adapt-Go) from PopUp Towing on a truck recently. It went in very easily. Instructions were very clear and we are very pleased in the outcome. We will definitely do more business with PopUp Towing.”
- Rick & Jean Horsch
“We purchased a CC2 Cushion Coupler by PopUp Towing. I’ll tell you what, after arriving home from the last horse show, we were amazed to find two cans of pop that were left on the dinette table still on the table. Now that’s a smooth ride!”
- Larry P.
“I was having trouble explaining my issue and determining a solution to my turning issue when towing my gooseneck trailer. A friend of mine said, you should try to call the guys at PopUp Towing as they helped solve his issues. Let me tell you, I spoke with two gentlemen at PopUp if I remember correctly their names were Derrick and Chance, those to guys seem to have more knowledgeable information than anyone I’ve spoken with in this industry. Years of valuable knowledge, and highly recommended if you have similar issues. Thanks again and I absolutely love the new RVGC complete pinbox replacement to allow me to tow my 5th wheel without the bulky 5th wheel hitch taking up my bed space.”
- Bill F.