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  1. Gooseneck and Fifth Wheel Adapters
  2. etrailer
  3. Gooseneck Trailer to Fifth Wheel Hitch
  4. Replaces Inner Tube
  5. 30000 lbs GTW
  6. Gooseneck Coupler Adapters
Ram Gooseneck to 5th Wheel Trailer Coupler Adapter - Round - 30K

Ram Gooseneck to 5th Wheel Trailer Coupler Adapter - Round - 30K

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Retail:$234.14
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Gooseneck and Fifth Wheel Adapters
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Shipping Weight: 45 lbs
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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 tube is included. 1-636-306-4830 to order etrailer gooseneck and fifth wheel adapters part number KPG5-R30IP or order online at etrailer.com. Free expert support on all etrailer products. Guaranteed Lowest Price and Fastest Shipping for Ram Gooseneck to 5th Wheel Trailer Coupler Adapter - Round - 30K. Gooseneck and Fifth Wheel Adapters reviews from real customers.
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  • Reviews (315)
  • Q & A (0)
  • Photos
  • Why etrailer?

etrailer Gooseneck and Fifth Wheel Adapters

  • Gooseneck Trailer to Fifth Wheel Hitch
  • Replaces Inner Tube
  • 30000 lbs GTW
  • etrailer
  • Gooseneck Coupler Adapters
  • Adapts Trailer
  • Adjustable Height
  • No Offset
  • Round Tube

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 tube is included.


Features:

  • Gooseneck-to-5th-wheel adapter lets you tow your gooseneck trailer with a 5th-wheel hitch
    • Round inner tube fits most standard, round gooseneck outer tubes
  • Adjustable height to fit your application
  • Sturdy steel construction
  • SAE J2738 compliant


Specs:

  • Tube diameter: 4"
  • Range of vertical adjustment: 8"
    • 2-11/16" From center of hole to center of hole
  • Pin hole diameter: 7/8"
  • Plate dimensions: 9-7/8" long x 9-7/8" wide
  • Weight capacity: 30,000 lbs
  • 1-Year warranty


KP5G-R30IP Ram Gooseneck to 5th Wheel Trailer Coupler Adapter Inner Tube - Round - 30,000 lbs

Item # KPG5-R30IP






Customer Reviews

Ram Gooseneck to 5th Wheel Trailer Coupler Adapter - Round - 30K - KPG5-R30IP

Average Customer Rating:  4.8 out of 5 stars   (315 Customer Reviews)

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 tube is included.

by:

I have 3 of them. They are a good product and they are built very well. I recommend them to anyone who wants to convert to a 5th wheel! etrailer is a Great Company to deal with! Take Care!’




by:

Amazing build and great design. This think is thick!

Very excited to see how much better the 34 foot cargo trailer will be with this conversion.




by:

Great product. Allowed me to use a friends gooseneck trailer with my fifth wheel hitch and haul 4 tons of wood pellets! Very easy to put on and take off.




by:

Works as it should, Fits perfectly, Changes to gooseneck in minutes for different vehicle


Comments
Works good, good fit, very easy to change
Gary - 03/28/2022


by:

Great products great prices always on time or early! Product is Exactly as stated in the ad!




by:

I ordered this item and within 2 days it had arrived. Installing it didn’t take over 10 minutes! I use my truck to work during the week and pull my 5th wheel on the weekend! Only thing I’d recommend purchasing is a lube plate to put on the hitch, that way you don’t have to deal with a greasy mess! I’d recommend this hitch to anyone!


Comments
The product is holding up well and works great. It is very convenient being able to switch from my camper to my gooseneck without having the change the hitch out!
Jacob - 03/30/2021


by:

Works great dont need to lift trailer much to unhook




by:

The product was fine. But this is how it showed up from UPS.




by:

Prompt delivery. Have not towed with the adapter yet, but product appears to be very heavy duty with thick walled pipe and very sturdy welds. I am anxious to test it.
This product allows me to use a fifth wheel hitch to haul my 34' camper trailer and quickly convert to haul my 35' gooseneck trailer with my tractor and implements.


Comments
I could not be more pleased with my kingpin adapter. It exceeds all my expectations and makes the conversion a simple process. My brother and me farm together and he is very impressed with the adapter. Others I have shown it to agree. I keep your site bookmarked for future reference.
RICHARD K - 04/30/2018



by:

My adapter arrived on time with no issues. Adapter has been installed.


Comments
works great no issues yet
Rudolph - 08/19/2021


by:

Your delivery service is terrible I have purched a few items from you and I have not had one delivered to my house, always neighbors, or not delivered at all. Maybe you should consider a new service.




by:

Nice heavy duty goose neck 5th wheel adapter fit good .
Allowed me to take on other hAuling jobs




by:

Wow I was blown away by your product and received it 2 days earlier a plus not to mention the thickness of this adapter this adapter was build like a tank no paint but for me that’s a plus I can paint it to color match my trailer win win for me and talk about the welds wow that’s an awesome weld job ...I’ll buy your products again hands down I loved it ...way more than expected and for the value you just can’t beat it..quality ..and made in the USA ..need I say more ..




by:

Fit like a glove




by:

Looks and fits good




by:

Well built for the price. Had to get one to take my class A cdl test, but now I can haul my 40' gooseneck trailer with any truck.




by:

The holes that were drilled in the shaft of the part was not lined up straight they where diagonal and made the plate not useable


Comments
I will have our customer service team reach out to you.
-- Etrailer Expert Jenny N - 11/21/2021


by:

I ordered a 30k gooseneck to kingpin conversion for a 40 foot heavy hay trailer. I received my order early. Upon inspection, I was pleased with the construction and then mounted it. it attaches to my single axle road tractor easily. it also provides better stability than the other options available. I am a first time customer and will likely be a repeat customer.




by:

I was told about your website by an RV dealer, I was looking for a goose neck to fifth wheel adapter for a horse trailer I had just purchased. I found what I was looking for at etrailer and ordered it, it was delivered in a couple days and the piece looked great and worked wonderful I was very impressed with the short turnaround time and would highly recommend your business




by:

thanks, we have been using this 5th wheel adapter on a daily bases. It has stabilized the trailer 100%. Very Satisfied with it. Thanks




by:

The web site is organized and easy to order from. The customer service are knowledgeable to answere questions and assist you to finalize your orders.




by:

Makes switch from gooseneck ball hitch trailers to the fifth wheel very easy and only moments to do. Transporting for a living every advantage time wise is a plus.




by:

Hitch sits to high at it's lowest setting both 5th wheel and Adapter set as low as possible .holes in Adapter not drilled in line with plate sits cockeyed on Trailer. Painted yellow for safety.




by:

It lets me use the trailer behind a semi; the load is less stress on the semi that on the 1.5 ton flatbed trucks.




by:

Works great for adapting the goose neck trailer into being able to be used with the 5th wheel plate in the truck



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315
Show More Reviews

See what our Experts say about this etrailer Gooseneck and Fifth Wheel Adapters



  • Recommended Adapters to Tow Gooseneck Trailer With 5th Wheel Hitch
    So you're wanting a king pin adapter that would take the place of your gooseneck coupler, is that correct? If that's the case, the best way to do that wouldn't be to add a pin box. You'd want to use a king pin adapter instead. Attempting to use an actual pin box would require lots of fabrication and engineering work to ensure the assembly would have the proper weight rating, as well as achieving the proper height so the trailer is towed level. The coupler adapter you need will depend...
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  • Does Ram Gooseneck to 5th Wheel Adapter KPG5-R30 Require Professional Welding
    Yes, when it comes to round gooseneck couplers, the industry standard is a 4 inch OD inner tube and 4.5 inch OD outer tube. The Ram Gooseneck to 5th Wheel Trailer Coupler Adapter # KPG5-R30 you referenced includes both the inner and the outer tubes, ideal for people needing to replace a damaged coupler or for someone looking to fabricate a trailer without an existing coupler. It sound like all you actually need is the Ram Gooseneck to 5th Wheel Trailer Coupler Adapter # KPG5-R30IP, which...
    view full answer...
  • Replacement Inner Tube for 30K Gooseneck to 5th Wheel Trailer Coupler Adapter
    If the outer tube you have on your trailer now measures to be 4-1/2" diameter then you will not need a new outer tube and you can use the Ram Gooseneck to 5th Wheel Trailer Coupler Adapter part # KPG5-R30IP. However, if the outer tube on your trailer is not 4-1/2" diameter then you will need both, the Ram Gooseneck to 5th Wheel Trailer Coupler Adapter part # KPG5-R30.
    view full answer...
  • Base Plate Size And Capacity Differences On The Ram Gooseneck To 5th Wheel Coupler Adapter
    I contacted the manufacturer on your behalf regarding your question. Per Ram, the plate is the same 10"x10" size on the # KPG5-R25-IP and the # KPG5-R30IP. Our review video also had it measured the same. The capacity difference increase for the 30k comes by way of the welded belly band around the bottom of the outer tube. The 30k capacity also comes from the .275" inner tube wall thickness vs the .24" inner tube wall thickness on the 25K. Included are video resources for more information...
    view full answer...
  • Dimensions of the Pin Holes and the Pin Hole Diameter on the Ram Gooseneck to 5th Wheel Coupler
    The Ram Gooseneck to 5th Wheel Trailer Coupler Adapter, part # KPG5-R30IP, fits most standard round gooseneck outer tubes. The Pin Hole Diameter is 7/8 inches and the Adjustment Holes, center to center, are 2-11/16 inches apart, giving it a Range of 8 inches for Vertical Adjustment. The Tube Diameter is 4 inches and the Plate Dimensions are 9-7/8 inches long and 9-7/8 inches wide.
    view full answer...
  • Diameter of the Ram Gooseneck to 5th Wheel Trailer Coupler Adapter # KPG5-R30IP
    Yes, the outer diameter of the Ram Gooseneck to 5th Wheel Trailer Coupler Adapter # KPG5-R30IP is 4 inch.
    view full answer...
  • Best Gooseneck Trailer to Fifth Wheel Adapter Solution for Towing with Short Bed Truck
    You are definitely on the right track to coming up with the best solution to allow you to tow your fifth wheel trailer and gooseneck trailer. Since you have a short bed truck it is important that you have turning clearance which converting the gooseneck to a king pin does allow you to still use the slider hitch and have the clearance you need. Since you have the standard 4 inch tube on your trailer the king pin adapter part # KPG5-R30IP is the way to go. This will fit in place of what...
    view full answer...
  • Dimensions of the Ram Gooseneck to 5th Wheel Trailer Coupler Adapter
    The overall length of the Ram Gooseneck to 5th Wheel Trailer Coupler Adapter - Round - 30K item # KPG5-R30IP is 29". It is 14" from the top of the tube to the first adjustment hole. I have attached a diagram detailing these measurements.
    view full answer...
    Image 1 for
  • Gooseneck Trailer Conversion to 5TH Wheel Hitch
    We have a great article (linked below) that discusses what you are looking to do. For a Round Adapter Tube # KPG5-R30IP. This inner tube fits most standard, round gooseneck outer tubes. It is 4" in diameter and has a vertical range of 8" with 2-11/16" from center of hole to center of hole. It is rated for 30,000lbs and features a 9-7/8" wide square plate. For a Square Adapter Tube # KPG5-Q30IP. This inner tube fits most standard, square gooseneck outer tubes. It is 4" square and has...
    view full answer...
  • Towing a Gooseneck Trailer with a 5th Wheel Hitch and Availability of Adapter for 3-3/4" Inner Tube
    While we do not have an adapter that is 3-3/4 inches in diameter I do have a couple of possible solutions for you. First, you could replace both the inner and outer tubes using # KPG5-R30. A certified professional welder would have to perform this installation. This is a viable solution if you will be towing the trailer with a 5th wheel hitch all the time. Second, if your truck has industry standard 5th wheel rails you could use a gooseneck plate instead, such as # 49080.
    view full answer...
  • Can Lube Plate Be Used with Ram Gooseneck Coupler Adapter # KPG5-R30IP
    You can absolutely use a 10" lube plate such as the Curt # 16721 with the Ram Gooseneck Coupler Adapter # KPG5-R30IP to keep the hitch head lubricated and scratch free. You may just want to take a look at the manual for your particular 5th wheel hitch, as some will note a maximum thickness on a lube plate like this. If you can tell me what model hitch you have I can also check this for you.
    view full answer...
  • 5th Wheel Slider Hitch Adapter For Gooseneck Trailer
    You will need to lock out the sliding function on your Pull Right 5th wheel hitch to use the Ram Gooseneck to 5th Wheel Trailer Coupler Adapter item # KPG5-R30IP. If you can not lock out your slider than I recommend the Curt Spyder Gooseneck Trailer Hitch for Fifth Wheel Rails Item # 16085. This adapter mounts to industry standard 5th wheel rails, has a 2-5/16" trailer ball, comes with safety chain attachments, and also includes pins and clips for rail attachment. I have attached a picture...
    view full answer...
    Image 1 for
  • What Are The Weight Limits On The B And W Companion 3000
    You won't have any problems with the companion model 3000. It has a Gross Trailer Weight (GTW) of 18,000 pounds and a Tongue Weight of 4,500 pounds. We have several options to help you convert to a 5th wheel trailer too. One of those is the Gooseneck to 5th Wheel Trailer Coupler Adapter - Square - 25,000 lbs # KPG5-Q25. Or we have the Ram Gooseneck to 5th Wheel Trailer Coupler Adapter - Round - 30K # KPG5-R30IP. If you give us the specs on your trailer I can help you get the best parts...
    view full answer...
  • Recommended Adapter To Connect Gooseneck Horse Trailer To 5th Wheel Trailer Hitch In Truck
    We have exactly what you are looking for. I recommend the Ram Gooseneck to 5th Wheel Trailer Coupler Adapter - Round - 30K # KPG5-R30IP which will replace the coupler on your trailer and give it a king pin to attach to your existing 5th wheel hitch. This adapter has a 4" outer diameter so as long as the matches the I.D. of your gooseneck trailers outer tube this will fir perfectly. If your trailer has a square outer tube then I recommend the # KPG5-Q30IP instead. This coupler adapter...
    view full answer...
  • Recommended Gooseneck to 5th Wheel Hitch Adapter
    It sounds like your 5th wheel trailer already has what it needs and you just need the adapter for the Ram Gooseneck if I understand correctly. If your gooseneck hitch has a round tube, then I recommend the Gooseneck to 5th Wheel Trailer Coupler Adapter # KPG5-R30IP. If it has the square tube, then I recommend the Ram Gooseneck to 5th Wheel Trailer Coupler Adapter Inner Tube - Square - 30,000 lbs # KPG5-Q30IP which has a 4 inch tube. Both options have a plate that is 9-7/8 by 9-7/8 inches....
    view full answer...
  • Safety Chains Required When Using An Adapter to Tow Gooseneck Trailer w/ A 5th Wheel Hitch
    I've spoken with a few of my towing industry contacts, who tell me that even if you use an adapter like the # KPG5-R30IP, safety chains should still be used. If the fifth wheel hitch you are using is compatible with industry standard bed rails, then you can use part # RP50223 to provide an attachment point for the safety chains. To prevent the chains from snagging on anything, you'll need to ensure that the safety chains are long enough to allow the trailer to make turns, but no longer...
    view full answer...
  • Fifth Wheel Rail Mounted Gooseneck Hitch for 2003 Chevy Silverado
    If your existing Reese bed mounted fifth wheel rails have slots in them that are 10 inches apart (center to center, side to side) and 22 inches apart (center to center, front to back), a rail mounted gooseneck ball like part # RP58079 would work great for you. Using the rail mounted ball would be a simpler solution than the # KPG5-R30IP you referenced, which would require you to use a fifth wheel hitch. I've provided a diagram showing the measurements I mentioned above, so you can measure...
    view full answer...
    Image 1 for
  • Is There A Way To Connect My Gooseneck Trailer To A 5th Wheel Hitch?
    We do indeed have a few options for connecting your gooseneck trailer to your B&W Companion slider. This will depend on if you have a square tube or round tube so I have both options listed below: etrailer.com Gooseneck to 5th Wheel Trailer Coupler Adapter - Square - 25,000 lbs # KPG5-Q25 etrailer.com Ram Gooseneck to 5th Wheel Trailer Coupler Adapter - Round - 30K # KPG5-R30IP Either of these will replace your current gooseneck coupler and lock right into the jaws of your B&W Companion....
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  • Recommended Gooseneck Hitch Ball to 5th Wheel Trailer Adapter
    The Fifth Wheel Trailer King Pin # 337KP20050 is a weld on king pin to make your trailer compatible with 5th wheel hitches. If you want the gooseneck trailer to 5th wheel king pin adapter, you can use the Ram Gooseneck to 5th Wheel Trailer Coupler Adapter Inner Tube - Square # KPG5-Q30IP or round # KPG5-R30IP. If you have a gooseneck hitch installed in your truck and you have a 5th wheel trailer, then you will want the Demco Recon Gooseneck-to-5th Wheel Trailer Hitch Adapter # DM8550045...
    view full answer...
  • Recommended 5th Wheel Rails and Gooseneck Conversion for 2003 Dodge Ram 1500 with 6.5 Foot Bed
    For your 2003 Dodge Ram 1500 Short box, the design of your gooseneck trailer will dictate whether you need an offset hitch ball or a slider hitch with a gooseneck adapter like # KPG5-R30IP or # KPG5-Q30IP. I've also attached the page to many other options that will adapt a gooseneck to work with a sliding 5th wheel hitch. A great option for a gooseneck trailer with a short box truck is the B&W Extend-A-Goose Gooseneck Coupler - 2-5/16" Ball - 10" Offset - 24,000 lbs # BWTEXA4200 to give...
    view full answer...

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Info for this part was:

Employee Michael H
Expert Research:
Michael H
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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