Gooseneck to 5th Wheel Trailer Coupler Adapter - Inner Tube - Square - 25,000 lbs

Gooseneck to 5th Wheel Trailer Coupler Adapter - Inner Tube - Square - 25,000 lbs

Item # KPG5-Q25-IP

lowest price pledge

Our Price: $159.63

Gooseneck and Fifth Wheel Adapters

This item qualifies for Free Shipping

Shipping Weight: 48 lbs

Quantity: 
In Stock, Ships Today
etrailer Adapts Trailer - KPG5-Q25-IP
zoom in icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
Please enter a valid email address.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

pop out icon replay 360 icon
horizontal rotate icon

Product Images

Customer Photos


  • Gooseneck Trailer to Fifth Wheel Hitch
  • Replaces Inner Tube
  • etrailer
  • Adapts Trailer
  • Gooseneck Coupler Adapters
  • 25000 lbs GTW
  • No Offset
  • Adjustable Height
  • Square Tube
King pin coupler allows you to pull your gooseneck trailer with a fifth-wheel hitch. The height easily adjusts to fit your application. Square inner tube is included. Call 800-298-8924 to order etrailer gooseneck and fifth wheel adapters part number KPG5-Q25-IP or order online at etrailer.com. Free expert support on all etrailer products. Guaranteed Lowest Price and Fastest Shipping for Gooseneck to 5th Wheel Trailer Coupler Adapter - Inner Tube - Square - 25,000 lbs. Gooseneck and Fifth Wheel Adapters reviews from real customers.


  • All Info
  • Reviews (19)
  • Q & A (21)
  • Videos (1)
  • Photos
  • Why etrailer?

etrailer Gooseneck and Fifth Wheel Adapters - KPG5-Q25-IP

King pin coupler allows you to pull your gooseneck trailer with a fifth-wheel hitch. The height easily adjusts to fit your application. Square inner tube is included.


Features:

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


Specs:

  • Tube width: 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: 25,000 lbs


KPG5-Q25-IP Ram Gooseneck to 5th Wheel Trailer Coupler Adapter Inner Tube - Square - 25,000 lbs







Video of Gooseneck to 5th Wheel Trailer Coupler Adapter - Inner Tube - Square - 25,000 lbs


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for etrailer Gooseneck and Fifth Wheel Adapters - Adapts Trailer - KPG5-Q25-IP Review

Today we're going to take a look at the square inner tube goose neck to fifth wheel trailer coupler adapter. It has a 25,000 pound weight capacity. This goose neck to fifth wheel inner tube adapter will let you two your goose neck trailer with a fifth wheel hitch. The square inner tube right here is designed to fit most standard square goose neck outer tubes. The kingpin right here on the bottom of the plate slides in to your fifth wheel hitch. It is an adjustable height design. You can see the four hole design right here. This allows you to adjust it to fit your application.

It is a sturdy steel construction. Notice down here between the tube and the plate they have some nice, heavy gussening for support. It is in a raw finish. It is SAEJ2738 compliant. Few specs on this. We're going to do the width.

The width on this inner tube edge to edge is going to be right at 4 inches wide. The range of your vertical adjustment, or height adjustment, is going to be 8 inches. If we Mauser from the center of the lowest hole to the center of the highest hole you can see center to center that's your 8 inch height adjustment. Now the measurement between each hole center to center is going to be 2 and 11/16th's inches. The diameter of the pin holes are 7/8's of an inch.

The dimension on the square plate right here is going to be right at 10 inches. Just to show you the very bottom here. This kingpin is your industry standard, 2 inch diameter kingpin that will fit most all your fifth wheel hitches. The weight capacity on this adapter is 25,000 pounds. That should do it few the review of the square inner tube goose neck to fifth wheel trailer coupler adapter with a 25,000 pound weight capacity.


Customer Reviews

Gooseneck to 5th Wheel Trailer Coupler Adapter - Inner Tube - Square - 25,000 lbs - KPG5-Q25-IP

Average Customer Rating:  4.9 out of 5 stars   (19 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. Square inner tube is included.

- KPG5-Q25-IP
by:

Very fast and prompt service. Product was just what it said it was . 484207



- KPG5-Q25-IP
by:

Heavy, well built. easy to install. Quick delivery, 522783



- KPG5-Q25-IP
by:

My pickup engine went down being unable to pull a my gooseneck with a ball application I ordered your 4 in kinpin adapter for a gooseneck trailer as you can see in the pictures it pinned in perfectly with no trouble at all with your adapter im able to get my trailers moves while repairs are made and with it i'll just have to use the fifth wheel hitch for the pickup witch is much more easy to use than a goose ball 313920



- KPG5-Q25-IP
by:

Very good quality. The welding is superior. Fit perfectly. 607151



- KPG5-Q25-IP
by:

Thanks you!!! 584544



- KPG5-Q25-IP
by:

I use this to pull my gooseneck flatbed with my road tractor. It works fine on both my trucks. 489637



- KPG5-Q25-IP
by:

Installation photo 488895



- KPG5-Q25-IP
by:

Looks great well built but holes for adjusting are to small for my application. 452315



- KPG5-Q25-IP
by:

Product was exactly like the video showed. Could not be happier. Thanks etrailer for another great product. 442513



- KPG5-Q25-IP
by:

This gooseneck to 5th wheel adapter was an excellent decision, hooking up my equipment trailer is now as piece of cake. 438127



- KPG5-Q25-IP
by:

Fit right in hooked right up 435453



- KPG5-Q25-IP
by:

Nice product and fast shipping 397498



- KPG5-Q25-IP
by:

Quick shipping n part fit just like it should..thank etrailer 367192



- KPG5-Q25-IP
by:

The king pin adapter works great and I won't have to switch back-and-forth between gooseneck ball and fifth wheel hitch anymore. I found the best price at the etrailer.com . 339363



- KPG5-Q25-IP
by:

Ordering was quick and easy. Product does what it is supposed to do. Shipping was fast. 316619



- KPG5-Q25-IP
by:

Super great service. Fast shipping with tracking. Product was exactly as listed and is built very well 313952



- KPG5-Q25-IP
by:

Quality manufacturing. I have a 1989 gooseneck car hauler with a 4 1/2 inch OD square tube and I'm changing it over to a king pin. This is a 4 inch OD and it fits perfectly inside my existing tubing. The holes aren't the same size as my original 4 1/2 inch but that's an easy fix. I can't wait to be able to tow my 5th wheel and my car hauler without having to switch from king pin to gooseneck ?????? 299577


Comments

Perfect, Works as good as new.

Opa - 09/27/2017

28528

- KPG5-Q25-IP
by:

Well made product, delivered on time & easy to order. All in all a very good experience. Thanks 292582



- KPG5-Q25-IP
by:

A great company to do business with very fast shipping 284962


21
21

Ask the Experts about this etrailer Gooseneck and Fifth Wheel Adapters
Do you have a question about this Gooseneck and Fifth Wheel Adapter?


  • Recommended Square Tube Gooseneck to 5th Wheel King Pin Adapter
  • It sounds like you have a gooseneck like the Atwood Gooseneck Trailer Coupler AT75401. For an adapter to kingpin, I recommend the Bulldog Gooseneck-to-5th-Wheel Trailer Coupler Adapter - Inner Tube - Square - 30,000 lbs # BD0289650300 or the # KPG5-Q25-IP. Both measure 4 inches outer diameter to fit inside a tube 4-1/2 inches outer diameter. Another option is to use the Bulldog Gooseneck-to-5th-Wheel Trailer Coupler Adapter - Square - 30,000 lbs # BD0289590300. This will only be needed...
    view full answer...

  • What Size King Pin On A Gooseneck Adapter Is Needed To Fit The Pro-Series Hitch, # PS30094
  • The Pro-Series 5th Wheel Trailer Hitch with Square Tube Slider, # PS30094, has a 15,000 lbs. gross towing weight capacity. It will accept a industry standard 2 inch king pin. It has 10 inches of slider travel to give you clearance between your truck and the trailer. This fifth-wheel trailer hitch will not fit trucks with beds shorter than 6 feet. It also will not fit trucks with flareside/stepside beds. A minimum 13 inches extended trailer pin box is recommended. We do have a couple...
    view full answer...

  • Gooseneck Trailer Hitch Ball with Offset for Fifth Wheel Rails
  • We do have a solution for you, though there is not a Gooseneck to 5th Wheel Trailer Coupler Adapter such as # KPG5-Q25-IP which has an offset. Since you are looking to use your gooseneck trailer and have a fifth wheel hitch I recommend checking out the Curt Above-Bed Gooseneck Trailer Hitch for Fifth Wheel Rails # 16055 which will give you a 3 inch offset. This will work with standard above-bed 5th wheel base rails from Curt, Reese, Draw-Tite, Hidden Hitch, and Valley. It has a 25,000...
    view full answer...

  • Adjustable Gooseneck To 5th Wheel King Pin Assembly
  • We don't have one that says anything that is compatible with a crank adjuster, but we do have the tube adapters you mentioned. If you have a round tube, I recommend the Gooseneck to Fifth Wheel Trailer Adapter # BD0289640300 which has a 4 inch outer diameter or for the square tube the Gooseneck to Fifth Wheel Trailer Adapter - Square, # KPG5-Q25-IP. This is 4 inches square outside measurement. If you are looking for a hitch that works in standard 5th wheel rails and works with a gooseneck...
    view full answer...

  • Recommended 5th Wheel Sliding Hitch For 2015 Ford F-250 4x4 and Gooseneck Trailer
  • The Demco Hijacker Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Above Bed - 18,000 lbs # DM8550034 is an excellent hitch for your 2015 Ford F-250 Super Duty 4x4. I personally think this is the best hitch available for short bed trucks because it has the autoslide ability to give you the clearance you need for safe turning. This hitch connects to industry standard 5th wheel rails, so I recommend the Demco Hijacker Premier Series Above-Bed Base Rails and Custom Installation...
    view full answer...

  • Calculating Clearance Between 2006 Dodge Ram 2500 Short Bed Cab and Gooseneck Horse Trailer
  • The gooseneck horse trailer is best towed using a gooseneck trailer hitch. For a gooseneck hitch, I recommend the Hide-A-Goose Underbed Gooseneck Trailer Hitch Installation Kit, # 9464-35. With this hitch installed you can flip the ball over when not in use to have full access to the bed floor. I have included links to the installation details and a video installation on a similar vehicle. When towing a gooseneck (or 5th wheel) trailer with a short bed truck like your 2006 Dodge Ram...
    view full answer...

  • Will Gooseneck to Fifth Wheel Trailer Adapter # KPG5-Q25-IP Fit Fifth Wheel Plate On A Mack Semi
  • The Gooseneck to Fifth Wheel Trailer Adapter # KPG5-Q25-IP has a 2 inch industry standard kingpin. If your Mack semi fifth wheel plate accepts a 2 inch kingpin, then this adapter will work. This adapter is designed to fit the inner tube on most standard gooseneck square tubes. It has a 4 inch square outside diameter. I also have the Gooseneck to Fifth Wheel Trailer Adapter # KPG5-R25-IP. It has a 2 inch kingpin and is designed to fit the inner tube on most standard gooseneck round tubes....
    view full answer...

  • Gooseneck or Fifth Wheel Hitch Recommendations for 2000 Ford F350 Cab and Chassis
  • The best hitch for you will really depend on what you're planning on towing. Gooseneck hitches are typically used for commercial or agricultural purposes while 5th wheel hitches are usually for recreational use. We offer a weld-on 5th wheel hitch, part # RP30054 that would have more than enough capacity for your needs. Once the hitch was in place, if you wished to tow gooseneck trailers, you could use an adapter like # KPG5-Q25-IP for a square tube gooseneck coupler or # KPG5-R25-IP for...
    view full answer...

  • Options For Towing A Fifth Wheel And A Gooseneck Trailer With a 2004 Chevy Silverado Short Bed
  • Yes, the Draw-Tite Gooseneck Plate, # 49080, will attach to your Reese above-bed rails and give you a gooseneck connection. The plate is rated for 25,000 gross towing weight, but the capacity will be determined by your installation kit and the above-bed rails. The hitch ball on the gooseneck plate is offset from the center of the plate. If you install the plate on your rails with the hitch ball towards the rear of your truck the measurement from the center of the hole in your rear rail...
    view full answer...

  • Fifth Wheel Adapter Options Other Than King Pin to Gooseneck Ball
  • We don't have a 2 inch receiver application, but we do have the B&W Turnoverball King Pin Adapter for Trailers with Inverted 5th-Wheel Hitches # BWGNXA4000 which is a 2-1/2 inch outer measurement on the solid square. We also have the Fifth Wheel Trailer King Pin # 337KP20050 with no connection on the backside if you need to make a custom adapter If you are looking for a gooseneck to king pin connection, we have the Gooseneck to 5th wheel adapter inner tube # KPG5-Q25-IP which has a...
    view full answer...

  • Will Gooseneck to Fifth Wheel Adapters Fit a Fifth Wheel Hitch on a Kenworth Over the Road Tractor
  • The most common size for a kingpin that fits a fifth wheel hitch is 2 inches in diameter. We have checked the kingpins on some of the truck trailers here on our lot and they measured 2 inches. I would recommend to measure the opening on your fifth wheel hitch with the jaw(s) closed to see if your Kenworth tractor will fit a 2 inch diameter kingpin. The gooseneck to fifth wheel adapters will come in either a square tube design or a round tube design. You will need to choose the adapter...
    view full answer...

  • Towing a Gooseneck Trailer with a 5th Wheel Trailer Hitch
  • All of the replace inner square tube adapters that we carry like # KPG5-Q25-IP are 4 inches square. But there is an option none-the-less. You could replace the entire coupler, inner and outer tube, with something like # BD0289590300. Removal of the old coupler and installation of the new one is going to require a qualified professional with experience in this sort of job. If this is not an option for you I recommend a different sort of adapter, one that fits in the truck. If your 5th...
    view full answer...

  • Recommendation for a Gooseneck to Fifth Wheel Trailer Hitch Adapter for a 2006 Dodge Ram
  • It sounds like you need a Gooseneck to fifth Wheel adapter like # KPG5-Q25-IP. This 4 inch outer diameter square tube will fit as an inner pipe on most standard gooseneck outer tubes. The overall length is 34-3/4 inches. We also have a round adapter that has an extend height of 31-5/16 inches, # BD0289580300.
    view full answer...

  • Availability of Fifth Wheel to Gooseneck Adapter with Round Tube
  • We have the Bulldog Gooseneck Adapter part # BD0289640300 that is designed to fit a round tube that measures 4 inch in diameter. I attached a review video for you to check out as well.
    view full answer...

  • Pulling Gooseneck Trailer w/ 5 ton Truck w/ Custom Fold-Away 5th Wheel Hitch
  • If the fifth wheel hitch is mounted using industry-standard 5th wheel rails (see photo), you can simply remove the existing fifth wheel, and mount an adapter like # 49080. If your gooseneck trailer has a removable coupler, we offer some king pins that will actually slide into the square or round tube the coupler fits into. For a round 4 inch diameter tube, use # KPG5-R25-IP or # KPG5-Q25-IP for a square tube that measures 4 inches square. If you have some other set up, please reply with...
    view full answer...

  • Can a Gooseneck to 5th Wheel Trailer Coupler Adapter Be Used with Bolts Instead of Locking Pins
  • As long as the inner diameter of the outer tube on your gooseneck trailer has a 4" wide opening then the Gooseneck to 5th Wheel Trailer Coupler Adapter part # KPG5-Q25-IP will still work for you. We do not have anything specifically designed for your trailer but the adapters are very universal with just slight modifications. On the adapter there are four 7/8" diameter pre drilled holes for vertical adjustment. The adjustment holes can be secured by either a locking pin or bolt. If the...
    view full answer...

  • Square Tube Gooseneck Coupler Adapter Recommendation
  • We offer 2 square tube gooseneck-to-fifth-wheel coupler adapters, the Redline Coupler Adapter, # KPG5-Q25-IP, and the Bulldog Coupler Adapter, # BD0289650300. These are quality couplers that would do an excellent job. If I were choosing one of these couplers, I would go with the Bulldog coupler because it has a wider bottom plate similar to a fifth wheel pin box that will make more contact with the fifth wheel hitch. It also has a small curved lip at the front of the plate making it...
    view full answer...

  • Hitch Pin Recommendation for the Gooseneck to Fifth Wheel Adapter # KPG5-Q25-IP
  • The hitch pin that I recommend for the Gooseneck to Fifth Wheel Adapter, # KPG5-Q25-IP, is the Redline Hitch Pin, # 346H. This hitch pin has a diameter of 3/4 inch and a length of 6 inches and it will work with the coupler adapter that you referenced. I verified the compatibility with my contact at Redline.
    view full answer...

  • Do You Have Adapters to Convert a Gooseneck Trailer to a Fifth Wheel
  • Yes, we have a couple different solutions that could solve your problem. Since you have a fifth wheel with rails already in your bed, I would suggest using a Gooseneck plate built for fifth wheel rails like Draw-Tite part # 49080. If you will be towing other fifth wheel trailers and need to keep your fifth wheel on the truck at all times and do not want to pull the fifth wheel on and off, we do have adapter tubes. If you have a round gooseneck coupler with a 4 inch outer diameter, you...
    view full answer...

  • Parts Available for Converting a Gooseneck Trailer for a Fifth Wheel Hitch
  • We do have a couple adapters that will take your gooseneck trailer to a fifth wheel king pin. One is part # KPG5-R25-IP. The tube is 4 inches outer diameter round so if you have an adjustable gooseneck, this part will slip right in. If you have a square tube gooseneck, you could use part # KPG5-Q25-IP. This tube is 4 inches square. I've linked the complete selection for you.
    view full answer...

  • Will Reducing Air Pressure in Suspension Air Bags Reduce Sway on a 5th Wheel Trailer
  • You can experiment with different amounts of air pressure in the air bags to get to the best ride quality. More pressure would make the bag stiffer and there would be less trailer at the front of the trailer (mostly vertically but also some side to side) and rear of the truck. A bag with less pressure would have more give and could be more of a cushion and absorb some of the force that is causing the sway. When the trailer does start swaying you will want to reduce speed and keep...
    view full answer...


Do you have a question about this Gooseneck and Fifth Wheel Adapter?




  • Why etrailer.com?

    At etrailer.com we guarantee:

  • Highest quality gooseneck and fifth wheel adapters for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate gooseneck and fifth wheel adapter information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Satisfaction Guarantee
    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Installed by:
Jeff D
Expert Research:
Jameson C
Photos by:
Zach O
Updated by:
Sarah W
Written by:
Amanda M
Updated by:
Mike S

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.