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  1. 5th Wheel Gooseneck Adapter
  2. etrailer
  3. Gooseneck Trailer to 5th Wheel Hitch
  4. Replaces Inner Tube
  5. Not Shock Absorbing
  6. Adapts Trailer
Gooseneck to 5th Wheel Trailer Coupler Adapter - Round - 30K
etrailer

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

Part Number: KPG5-R30IP
$174.90
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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etrailer 5th Wheel Gooseneck Adapter - KPG5-R30IP

  • Gooseneck Trailer to 5th Wheel Hitch
  • Replaces Inner Tube
  • etrailer
  • Not Shock Absorbing
  • Adapts Trailer
  • 30000 lbs GTW
  • No Extra Clearance

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:

Ratings & Reviews

4.7

823 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.

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

  • Dimensions of Gooseneck to 5th Wheel Trailer Coupler Adapter
    Hey Jackson! The distance from the top of the tube down to the plate is 29". The distance from the top to the first bolt hole is 14". I went ahead and attached some diagrams of the # KPG5-R30IP below. I don't have the full height down to the bottom of the pin but I can get it if that is what you're looking for. Just let me know in the comments below.
    view full answer...
  • 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...
    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
  • 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
  • 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...
    view full answer...
  • 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....
    view full answer...
  • 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.
    view full answer...
  • 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.
    view full answer...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
    view full answer...
  • Picking Out Gooseneck to Fifth Wheel Adapter that Could Fit Diamond C FMAX 212 HDT Trailer
    Most likely the Ram Gooseneck to 5th wheel adapter part # KPG5-R30IP is what you'd need as this fits most gooseneck hitch tubes that have an inner tube diameter that is 4 inches. If you have a different setup let me know. Another popular setup is 4 inch square tube like with the part # KPG5-Q25-IP. I attached a link to a page that has all of the adapters we have for you to check out as well.
    view full answer...
  • 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...
  • 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.
    view full answer...
  • 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.
    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...
  • Weight Capacity of etrailer Goosesneck to Fifth Wheel Adapters # KPG5-R30IP and # KPG5-Q25-IP
    The etrailer fifth wheel adapters part # KPG5-R30IP and # KPG5-Q25-IP do not have vertical weight capacities. As long as the overall trailer capacity figure is not exceed of either you'd be safe. The part # KPG5-R30IP has a 30k capacity and the # KPG5-Q25-IP is rated for a 25k trailer.
    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...
  • 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...


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Info for this part was:

Employee Michael H
Expert Research:
Michael H
Employee Jameson C
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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
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Employee Amanda M
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