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  1. 5th Wheel Gooseneck Adapter
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  3. Gooseneck Trailer to 5th Wheel Hitch
  4. Replaces Inner and Outer Tubes
  5. Not Shock Absorbing
  6. Adapts Trailer
Ram Gooseneck to 5th Wheel Trailer Coupler Adapter - Round - 30,000 lbs
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Ram Gooseneck to 5th Wheel Trailer Coupler Adapter - Round - 30,000 lbs

Part Number: KPG5-R30
905 Reviews | 17 Questions
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$214.14
 5th Wheel Gooseneck Adapter
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etrailer 5th wheel gooseneck adapter adapts trailer not shock absorbing ram to coupler - round 30 000 lbs
etrailer 5th wheel gooseneck adapter replaces inner and outer tubes not shock absorbing kpg5-r30
etrailer 5th wheel gooseneck adapter adapts trailer replaces inner and outer tubes ram to coupler - round 30 000 lbs
etrailer 5th wheel gooseneck adapter replaces inner and outer tubes not shock absorbing kpg5-r30
etrailer 5th wheel gooseneck adapter adapts trailer replaces inner and outer tubes ram to coupler - round 30 000 lbs
etrailer 5th wheel gooseneck adapter adapts trailer replaces inner and outer tubes ram to coupler - round 30 000 lbs
etrailer 5th wheel gooseneck adapter trailer to hitch not shock absorbing kpg5-r30
etrailer 5th wheel gooseneck adapter trailer to hitch replaces inner and outer tubes
etrailer 5th wheel gooseneck adapter trailer to hitch not shock absorbing kpg5-r30
etrailer 5th wheel gooseneck adapter adapts trailer not shock absorbing
etrailer 5th wheel gooseneck adapter adapts trailer to hitch
etrailer 5th wheel gooseneck adapter adapts trailer not shock absorbing
etrailer 5th wheel gooseneck adapter adapts trailer not shock absorbing
etrailer 5th wheel gooseneck adapter adapts trailer to hitch
etrailer 5th wheel gooseneck adapter trailer to hitch replaces inner and outer tubes kpg5-r30
etrailer 5th wheel gooseneck adapter adapts trailer to hitch ram coupler - round 30 000 lbs
etrailer 5th wheel gooseneck adapter adapts trailer replaces inner and outer tubes kpg5-r30
etrailer 5th wheel gooseneck adapter replaces inner and outer tubes not shock absorbing kpg5-r30

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King pin coupler allows you to pull your gooseneck trailer with a fifth-wheel hitch. The height easily adjusts to fit your application. Round inner and outer tubes replace the gooseneck coupler on your trailer. Load-bearing pin included. 1-800-940-8924 to order etrailer 5th wheel gooseneck adapter part number KPG5-R30 or order online at etrailer.com. Free expert support on all etrailer products. Great prices and Fastest Shipping for Ram Gooseneck to 5th Wheel Trailer Coupler Adapter - Round - 30,000 lbs. 5th Wheel Gooseneck Adapter reviews from real customers.
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etrailer 5th Wheel Gooseneck Adapter - KPG5-R30

Highlights

  • Tow Your Gooseneck Trailer with a Fifth Wheel Hitch: Converts your gooseneck coupler to a standard 5th-wheel connection so you can hook up to a fifth-wheel hitch.
  • 30,000 lbs Capacity for Heavy Loads: Rated to handle serious towing jobs like equipment and livestock trailers.
  • Adjusts for the Right Ride Height: 8" vertical adjustment (2-11/16" hole-to-hole) lets you level your trailer easily.
  • Stays Strong Under Load: Heavy-duty steel with .275" plate thickness and load-bearing pin built to hold up under stress.
  • Simple Weld-On Replacement: Inner 4" and outer 4-1/2" round tubes replace your existing coupler for a clean, solid install.
  • Meets SAE J2738 Standards: Tested and compliant for reliable connection and long-term durability.

Features to know about

Convert Your Gooseneck Trailer for Fifth Wheel Towing: Includes Inner and Outer Tubes

If you want to pull your gooseneck trailer with a fifth wheel hitch, this adapter makes it possible. The Ram Gooseneck to 5th Wheel Trailer Coupler Adapter replaces both the inner and outer tubes of your existing coupler so the trailer connects to a fifth wheel hitch instead of a gooseneck ball. It’s designed for round couplers, with a 4" inner tube and 4-1/2" outer tube that match standard dimensions. The setup installs on the trailer and includes a heavy-duty load-bearing pin so you can count on a secure link once everything is in place.

Adjusts for the Right Ride Height: 8" Vertical Adjustment Range

Getting the right height between your trailer and hitch is key for safe towing. This coupler gives you an 8" range of vertical adjustment, making it easier to dial in your setup. The tube length measures 20", with 2-11/16" between pin holes center-to-center, so you can fine-tune the fit for your application. Whether you’re setting up from scratch or replacing an old coupler, that flexibility helps get things level and stable.

Built Strong for Heavy Loads: Rated at 30,000 lbs

When you’re hauling serious weight, you need gear that’s up to the job. This adapter is made from sturdy steel and rated for 30,000 lbs weight capacity. The plate thickness comes in at .275", giving it the solid build needed for demanding use. It meets SAE J2738 standards, so it’s tested to handle the stress of real-world towing without compromise.

Simple, Durable Design: No Extra Clearance or Moving Parts

This coupler keeps things straightforward with no extra clearance built in and no shock-absorbing components to maintain. The flat 10" x 10" plate gives a clean mount surface, while the welded outer tube provides long-term durability. Once installed by a qualified welder, it becomes a permanent part of your trailer frame—solid, dependable, and ready for heavy use trip after trip.

Specifications

Technical diagram of the KPG5-R30 gooseneck trailer coupler showing measurements and component layout for sizing and installation reference.

Specs

Dimensions

  • Range of vertical adjustment: 8"
  • From center of hole to center of hole: 2-11/16"
  • Inner tube diameter: 4"
  • Outer tube diameter: 4-1/2"
  • Length: 20"
  • Pin hole diameter: 7/8"
  • Plate dimensions: 10" long x 10" wide

Technical diagram of Ram Gooseneck to 5th Wheel Trailer Coupler Adapter KPG5-R30 showing labeled dimensions and measurements for bolt placement and tube spacing.

  • 1 — From the top of the outer tube to the center of the top set bolt is: 11.33"
  • 2 — Distance between the set bolts on center is: 2.66"

Weight and Capacity

  • Weight capacity: 30,000 lbs

Compliance and Warranty

  • Compliance: SAE J2738 compliant
  • Warranty: 1-Year warranty

KP5G-R30 Ram Gooseneck to 5th Wheel Trailer Coupler Adapter - Round - 30,000 lbs







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Customer Satisfaction Score:

Ratings & Reviews

4.7

905 reviews
5 Stars
(748)
4 Stars
(86)
3 Stars
(30)
2 Stars
(18)
1 Star
(23)
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by:
A great way to make your trailer more secure to your tow vehicle. No josseling around from a loose ball connection. Easy hook up, less jacking. Lower your Jack’s to the ground and snug it up. Unlatch and pull out.
by:
This adapter increased my revenue by 25% as now I can haul gooseneck trailers. Highly recommend for simi's that do power only with long slide fifth wheel. I really give it a 10 star
by:
Excellent product easy to install. No more switching between 5th wheel and gooseneck hitch ball.
by:
Quality control kinda sucks with this one. I'm not happy with the crooked set screws primarily. Also not happy with the crooked load bearing pin holes that so many others mentioned. I bought this combo because it was only $[XX] more than the inner shaft by itself. Tried to get a partial refund or send it back but they want me to pay for shipping, so it's not worth it. I would recommend buying the Bulldog brand, might have better quality design.
by:
Easy to install. I have my fifth wheel hitch in all summer for my RV so its great to have 1 hitch
by:
Best customer service experience parts came in faster than expected and well packaged had placed the wrong order the first time and emailed the customer service to cancel order on a sunday replied right away and got me set up with the correct parts definitely my go to place from now on as a first generation farmer and having to deal with many trailers either to move cattle or equipment this is a place of business i can now trust thank you customer service department
by:
shipping was fast showed up in 3 days like told . was easy ordering very easy to install going to use it on a flatbed 25 foot trailer to haul tractors and big round bales or hay now going to be able to use semi tractor instead of pickup. going to put it to the test this weekend.
by:
Functionality it's fine. However it was not pri.ed or painted. Also the pin holes were not drilled at a 90 degree with the foot. Foot is angled on the fifth. This is an authentic thing but never ltheless it shows the lack of detail in the manufacture.

Welds are all good and is functional as was meant to be.
by:
This makes the changing between hitches very convenient.
by:
Was just as advertised. Nice quality with fast shipping . Thank you for your service.
by:
Shipping was fast and communication was very good.Will recommend and I will do more business thank you.
by:
Great quality and great shipping the way all company's should operate thanks again
by:
Great value, great service and very fast shipping.
by:
THIS COUPLING IS EXACTLY WHAT I NEEDED, IT IS WELL BUILT AND I HAD IT IN TWO DAYS. FOUND YOU GUYS ON THE INTERNET. THANK YOU.
by:
Had to place holes for adjustable neck 90 to length of trailer, made pad catch on a corner when backing in. otherwise I've enjoyed the coupler
by:
Very sturdy and ready to weld in right out of the box. I’ve been using for a year now and it’s held up great.
by:
Good product, fast service and delivery. Good communication. Very pleased with product and company.
by:
I'm giving this five stars because it's a well-built robust unit for a good price, exactly what was pictured, and arrived before the promised date.

It needed to be better packed, as the heavy piece with sharp edges had torn the box up and the UPS driver was having to take special care to keep it from falling out.
by:
the hitch is what we ordered and fit our needs. people were friendly and helpful.
by:
Good product. Exactly what I needed
by:
Exactly what the description says it would be, and arrives right on time..... Thank you for everything
by:
George has made this a easy transaction and fast delivery
by:
VERY WELL BUILT
by:
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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Jeff D
Installed by:
Jeff D
Employee Wilson B
Updated by:
Wilson B
Employee Mike S
Updated by:
Mike S
Employee Amanda M
Written by:
Amanda M

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