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

Part Number: KPG5-R30IP
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$163.01
Retail:$178.26
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5th Wheel Gooseneck Adapter
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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. 1-800-940-8924 to order etrailer 5th wheel gooseneck adapter part number KPG5-R30IP or order online at etrailer.com. Free expert support on all etrailer products. Great prices and Fastest Shipping for Gooseneck to 5th Wheel Trailer Coupler Adapter - Round - 30K. 5th Wheel Gooseneck Adapter reviews from real customers.
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  • Reviews (656)
  • Q & A (0)
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etrailer 5th Wheel Gooseneck Adapter - KPG5-R30IP

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

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
  • Heavy-duty load-bearing pin (GCPN-PIN) sold separately
  • Sturdy steel construction
  • SAE J2638 compliant


Specs:

  • Tube diameter: 4"
  • Range of vertical adjustment: 8"
    • 2-11/16" From center of hole to center of hole
  • Pin hole diameter: 13/16"
  • Plate dimensions: 9-7/8" long x 10" wide
  • Weight capacity: 30,000 lbs
  • 1-Year warranty


Diagram showing plate dimensions for gooseneck


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





Customer Satisfaction Score:


Customer Reviews

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

Average Customer Rating:  4.7 out of 5 stars   (655 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:

This may be a compatibility issue between manufacturers, but why is the front of the hitch pin plate not centered with the trailer center

Etrailer Expert

Jenny N.

5/29/2024

To be honest we have asked our manufacturers this question before however we have not gotten a definitive answer. We do know that it does not effect the performance.



by:

I like this a whole lot better than the gooseneck. hooking up is faster and easier. no trying to guess if youre over the ball or not, just back into it until the jaws latch.., I will be putting this on all my goosenecks. love it! Not to mention it took the chucking out..

Monty

6/23/2024

its a great idea, im worried about the welds, i see rust coming thru the powder coat where there shouldnt be



by:

Great craftsmanship on the adapter, works perfect. Will save my back not having to pull out 5th wheel hitch every time I need to switch to pulling a different trailer. Overall experience was excellent. Great prices, awesome customer service and fast delivery time.



by:

Package arrived in some what good condition all products were undamaged shipper (UPS) dosent handle your products with care !



by:

With shipping that fast I’ll never get my trailer parts from anyone else!



by:

100% as advertised, zero damage to the excellent box used for shipping.

Dave T.

9/9/2024

The item rusted quickly to it was sand blasted and painted. Welds are intact, no issues with the product at all.



by:

The gooseneck to 5th wheel adaptor has worked great and is a quality part. I would recommend it to anyone that is transitioning a trailer.



by:

I am extremely happy with this fifth wheel adapter, works great, was delivered in a timely manner



by:

Product arrived promptly and was as adv ertised.

David

6/21/2024

Love it!



by:

For a semi it needs to be wider, doesn't ride on the friction plate.



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:

Excellent service from easy ordering & check out. Quick delivery of the product. Great quality products. I have ordered before & will order again. Exceptional service & products.



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:

Product looks great, very excited to put it to the test. Not fully impressed on its packaging, but it wasn't harmed in any way so can't complain



by:

Fast service. Excellent communications.



by:

It looks very nice. Paint or at least primer would be nice on the exposed lower 4 inches. (to the top of the gussets) but I can rattle can it. Nice fabrication.

Lking

2/1/2024

Still working great. I use the nylon shim so no grease required either except in the jaws. Excellent.



by:

Ordering online was easy and delivery was very fast.



by:

Perfect fit. Easy install. It comes raw. Buy a can of paint to match your trailer.



by:

Arrived on time and was exactly what I was looking for



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:

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:

Have not unboxed or used it yet but shipping was good.



by:

Not much to the big chunk of metal but it is definitely heavier then my gooseneck coupler. It definitely feels like it can take 30k lbs! A little downside I have to really clean it up and the rust to paint it, it comes bare. Otherwise I'm happy with it!!



by:

Exactly as described & fast shipping



by:

good product, good price, welds are not up to standards, well at least my standards. i added another pass on all welds for added strength and peace of mind.


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Show More Reviews

See what our Experts say about this etrailer 5th Wheel Gooseneck Adapter

  • Gooseneck to 5th Wheel Adapter for Big Tex 14GN
    Since you have a 4" round tube you need the Ram Gooseneck to 5th Wheel Trailer Coupler Adapter # KPG5-R30IP. This will replace the inner tube on your Big Tex 14GN. The # KPG5-R30 you were looking at comes with the same inner tube along with the outer tube.
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  • Adapting A Kauffman Gooseneck Trailer To A Fifth Wheel Hitch
    I am not sure exactly which model of Kauffman gooseneck trailer you have, but the easiest way to adapt to a 5th wheel hitch will be to use a coupler adapter. This will replace the gooseneck coupler inner tube with a traditional fifth wheel kingpin. We have the # KPG5-R30IP for a 4" round tube, or the # KPG5-Q30IP for a 4" Square tube. Both of these are rated for 30K so more than enough capacity wise for your trailer. You can use the Load bearing pins # GCPN-PIN to make your connection....
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  • Recommend Parts to Convert a 30,000 lbs Gooseneck Hitch to a 5th Wheel Hitch
    Yes, we do have the parts you need to convert your Big Tex trailer over to a 5th wheel hitch. You will want the Ram Gooseneck to 5th Wheel Trailer Coupler Adapter item # KPG5-R30IP. It has a 30,000 lbs capacity. The Ram Adapter item # KPG5-R30IP replaces the inner tube only and can be bolted on to your Big Tex 25GN's existing outer tube. This adapter has a 4" diameter so it should fit but you will want to confirm before ordering. If you end up needing to replace the entire coupler and...
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  • Will Ram Gooseneck to 5th Wheel Trailer Coupler Adapter Fit 1998 Sundowner
    You will need the safety pin hole to use the # KPG5-R30IP. It should be pretty easy to drill a hole to make this work and then get a replacement pin # GCPN-PIN. Alternatively, you could get the # KPG5-R30 which includes the outer tube with the hole for the safety pin and replace what you have now.
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  • Gooseneck to 5TH Wheel Adapter For 30K Trailer With 4" Diameter Inner Tube
    The Gooseneck to 5th Wheel Trailer Coupler Adapter # KPG5-R30IP you found is our only 4" tube rated for 30K. The plate does not have to sit perfectly square inside the 5th wheel hitch as it will still latch into the coupler. You will want to face the side with the most of the raised lip towards the front so that it can more easily slide on the 5th wheel. Understanding it will not be a perfect 90 degree angle but it will still load into the hitch.
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  • Parts Needed To Pull A Gooseneck Trailer Behind a 2007 Kenworth T800
    I do see your Holland FW35 is designed to fit a 2" kingpin like the one used on both the 25K # KPG5-R25-IP and 30K # KPG5-R30IP coupler adapters you looked at. For the wiring you will need to create a custom adapter. First you will need the 7-Pole Round Pin Connector # PK11702. This will need to be wired to the Tail Light Converter # HM48847 since the 7-pin connector on your Kenworth has separate wiring for the brake and turn signals and a 7-way Blade # PK12-707E combines the brake and...
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  • 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...
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  • 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 # 16055.
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  • 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...
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  • 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...
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    Image 1 for
  • 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.
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    Image 1 for
  • Will Ram Gooseneck to Fifth Wheel Adapter Use Same Connection as Tractor Trailer
    Tractor trailers do use fifth wheel hitches for connection so yes, the Ram Gooseneck to 5th Wheel adapter part # KPG5-R30IP would provide the connection needed for a gooseneck trailer as it will convert it to a fifth wheel king pin.
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  • 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...
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  • 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.
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  • 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.
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    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....
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    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...
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  • 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.
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  • 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...
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  • 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...
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  • Will Curt PowerRide 5th Wheel Trailer Hitch Work with Gooseneck to 5th Wheel Hitch Adapter
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Do you have a question about this 5th Wheel Gooseneck Adapter?


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 Michael B
Updated by:
Michael B
Employee Amanda M
Written by:
Amanda M

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