bing tracking image
  1. Fifth Wheel King Pin
  2. Lippert
  3. Lippert 1621HD
  4. 21000 lbs GTW
  5. Upgraded Pin Box
  6. Absorbs Road Shock and Reduces Chucking
Curt Air Ride 5th Wheel Pin Box - Lippert 1621 & 1621HD - 21,000 lbs

Curt Air Ride 5th Wheel Pin Box - Lippert 1621 & 1621HD - 21,000 lbs

Retail:$1,957.22
Our Price: $1,299.78
You Save: $657.44
Fifth Wheel King Pin
Shipping Weight: 184 lbs
Add to cart
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

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.

Product Images

In Use/Installed

Customer Photos

Need help with installation?
Locate installers near me
Enjoy smooth, stable towing with your fifth-wheel trailer by replacing your ordinary pin box with this air-ride-equipped model. An internal air bag and built-in strut absorb road shock so that you won't feel it. Replaces Lippert 1621 pin boxes. 1-800-940-8924 to order Lippert fifth wheel king pin part number LC158778 or order online at etrailer.com. Free expert support on all Lippert products. Great prices and Fastest Shipping for Curt Air Ride 5th Wheel Pin Box - Lippert 1621 & 1621HD - 21,000 lbs. Fifth Wheel King Pin reviews from real customers.
  • All Info
  • Reviews (144)
  • Q & A (0)
  • Photos

Lippert Fifth Wheel King Pin

  • Lippert 1621HD
  • 21000 lbs GTW
  • Upgraded Pin Box
  • Lippert
  • Absorbs Road Shock and Reduces Chucking
  • Fixed Turret

Enjoy smooth, stable towing with your fifth-wheel trailer by replacing your ordinary pin box with this air-ride-equipped model. An internal air bag and built-in strut absorb road shock so that you won't feel it. Replaces Lippert 1621 pin boxes.


Features:

  • Air ride pin box replaces standard pin box on your 5th-wheel trailer to cushion your ride, improve handling, and limit strain on truck and trailer
    • Minimizes chucking
    • Eliminates bounce and jarring
  • Internal air bag absorbs road shock
    • Scissor-like motion allows pin box to compress, compensating for jarring and bounce
    • Built-in shock ensures that pin box rebounds - keeps air bag from breaking down
  • Black powder coat provides rust resistance
  • Sturdy steel construction
  • King pin connects to any 5th-wheel trailer hitch
  • Bolt-on installation with no assembly required
  • Made in the USA


Specs:

  • Designed to replace Lippert 1621 and 1621HD long-jaw 5th-wheel pin boxes
  • Weight capacity: 21,000 lbs
  • Length (from outside edge of mounting plate to center of king pin): 28-11/16"
  • 1-Year limited warranty


Note: Do not use the Curt air ride pin box with any type of gooseneck adapter.


Getting there is half the fun, right? Not if you're being bumped, jerked, jammed, and pushed around from the chucking and road shock that occurs as you tow your fifth-wheel trailer or RV. And imagine the costly wear and tear on your trailer as it endures that rocky ride.


Put the fun back into your trip and ease the stress on your trailer by replacing your factory pin box with the Curt air ride pin box. The internal air bag and built-in shock work together to cushion your ride, improve handling, and limit strain on both your truck and your trailer.


Air Bag Absorbs Road Shock

Lippert Trailair air ride pin box air bag and shock

Standard pin boxes without any type of shock absorption transfer road shock to your trailer, resulting in potential damage to the trailer and an overall bumpy ride. But the Curt air ride pin box absorbs shock and cushions your ride as you pull your fifth-wheel trailer. When you encounter uneven terrain on your trip or hit a pothole on the highway, the Curt air ride pin box compresses vertically, similar to how a pair of scissor blades closes in on each other. This compression transfers the road shock and vibrations to the internal air bag, saving your fifth-wheel hitch, trailer, or tow vehicle frame from enduring a rocky ride.


A built-in strut, or shock, controls the Curt air ride pin box's compression so that the internal air bag doesn't burst. The strut also causes the pin box to appropriately rebound without any bounce, and positions it to be ready for the next bump in the road.


Simple Setup and Installation

First, simply remove your existing Lippert 1621 or 1621HD pin box from your trailer. The Curt uses the same bolts that held on your original pin box so no additional hardware is required for installation. Plus, the Curt pin box comes out of the box ready to be put on your trailer, so no assembly is needed. Because the Curt is quite heavy, you should put it on an elevated surface or have a friend help you support its weight during installation.


Lippert Curt air ride pin box air intake valve and inflation indicator

The internal air bag should be inflated after the pin box has been mounted on your trailer. Using the air intake valve, inflate the air bag until the outer cylinder of the shock rises high enough to fully expose the yellow inflation indicator sticker.



158778 Lippert Components (LCI) Air Ride by Trail Air Fifth Wheel Kingpin Box for Long Jaw Lippert 1621 and 1621HD

Same as 35-946203 Ultra-Fab Air Ride Trail Air Kingpin Box

Replaces 171200

Item # LC158778





Customer Satisfaction Score:


Customer Reviews

Curt Air Ride 5th Wheel Pin Box - Lippert 1621 & 1621HD - 21,000 lbs - LC158778

Average Customer Rating:  4.7 out of 5 stars   (144 Customer Reviews)

Enjoy smooth, stable towing with your fifth-wheel trailer by replacing your ordinary pin box with this air-ride-equipped model. An internal air bag and built-in strut absorb road shock so that you won't feel it. Replaces Lippert 1621 pin boxes.

by:

the fit was perfert. as you can see from the pictures is attached, i drilled a hole in the top to drain water that collects. i fabercated a cover to fit over the opening.

Jimmy

5/12/2024

still works great.



by:

Our fifth wheel experienced pin box cross frame cracking while on a trip. After having it properly repaired I decided to invest in the Trail-air pin box to alleviate the shock and harsh pounding from our lousy roads. I purchased from etrailer.com and installed it myself. Being only a 29 foot 5th wheel the tounge weight is low so after experimenting with pressures I run 40 psi in it and it flexes when hitting bumps or dips taking the stress off the trailer. Tows like a dream. Knowing what I know now I would have bought and installed it when I bought the 5th wheel and saved a repair during a trip. It is expensive but well worth it.

Charles F.

10/26/2023

Still very pleased with my purchase and reassurance it gives me against future problems.



by:

Swapped out the MorRyde cushioned pin box. This Air Ride is awesome



by:

I’ll start from the second I ordered this online. Confirmation email, then within days a shipping confirmation. When I ordered my shipping said 2 weeks out for delivery. I got the item in 9 days. The communication from the freight service was top notch. Unlike, some reviews the item was in great condition when it arrived. On a pallet in a box. No complaints. The driver even let me back up to his lift gate and help me slide the item into my truck for easier install. I had previously removed the factory hitch box prior to arrival so when the upgraded item arrived I was ready for install. Took about an hour to line everything up. Used a jack in the truck bed to help lift item where I needed it. I haven’t towed with it yet, that’ll be next week. But it looks beastly and like it’ll be a much more comfortable ride for me and my truck. Very happy so far, will leave an updated review after an out of state trip next weekend. etrailer was great. First item Ive ordered from you all but I’ll be back. Thank you!! Happy customer!!



by:

The king pin has eliminated about 80% of the chucking. I pull 16k fiver. I am very happy with it. Related I always use etrailer for my parts purchase. One time I was stranded near Disneyland. I needed shackle. They had me triple check for correct part and rushed delivery. These guys are the real deal.



by:

Best upgrade to the 5th wheel you can do. Our first cross country trip and I-40 beat the snot out of us on all the bridge transitions with the stock pin box. Immediately ordered this unit and now it’s like the trailer is floating behind us. I run 65 psi in the airbag. Solid unit and easy installation.



by:

Obviously a quality product made with quality materials. As you can see in the photo I placed the bottom bolts in the bottom hole. Problem is the bottom steel place is very close to the hardware so I had to have the bolt facing outward on the two bottom forward bolts. Don’t like torquing bolt heads but it worked. This is being very nit picky Torqued to 160 ft lbs.



by:

This is an outstanding pin box. It makes our trailer pull really nice. I know everyone says "I didn't even know I was towing anything" which is usually not the case, however with this, it really was like nothing was/is behind me. I highly recommend this product.



by:

Easy install. I dropped it down one hole Vs. the factory one and still has all 10 bolts without drilling any holes.



by:

With the help of my wife, I had the Flex Air pin box installed within 1.5 hours. Used a floor jack on top of my pickup tailgate.



by:

I love this AirRide by Trail-air. It provides an incredibly smooth ride on the road. You can adjust the amount of air for your ride, the Schrader valve is right on top of the unit and easy to access. My Trail air installed easily on my Forest River Sandpiper 372LOK mid bunk, especially with help from my Dad. This Trailair solved a big problem for me. I needed an extra couple of inches space between my 2018 Ford Super Duty DRW and the coach. My truck came with the Ford factory-installed Reese 27K hitch and I needed more clearance to allow the tailgate to drop without touching the coach. The kingpin on the Trailair sits at least 2” forward of the factory kingpin and provided that desperately needed space. It really makes for smooth and quiet ride !
etrailer folks were very helpful. The first unit was damaged by the freight company and when I notified them, etrailer sent another unit quickly. I will buy from etrailer whenever I can..

Bernie C.

5/26/2020

I still love the ride it provides- always smooth. Wouldn’t use a standard kingpin again. The airbags lose air over time- it’s my only complaint. Not enough to effect performance on a week-long trip but it loses air. I tightened the fill valve. Will re-tape the valve again if needed.



by:

Added this pin box to improve ride and give my rv a smoother pull. The owners manual says you can use the orginal nuts and bolts, but felt getting new ones that are grade 8 was the best route for me.
The pin box had several deep scratches due to shipping so I mounted it and then painted over the scratches and resolved the problem.
The rebound shock didn't have the yellow arrow like the one in the pictures, does have an max inflation stamped in the shock but black on black doesn't help for proper inflation so I painted the arrow yellow, not great but it works.
Number one issue is no matter the inflation of the airbag I can't get it too the top of the arrow as required. I checked the PSI on the airbag and was at 135 PSI. I felt that was too high of air pressure and there's nothing in the manual or online to say how much air should be in an airbag so I went with 98 PSI to be safe.
As for the ride I feel it was an improvement over the previous pin box but to be honest my F450 has airbags as well, so was the improvement due to the pin box or because of the truck airbags. I'll go with both had factors with the ride. But the number 1 factor for me was the 21000 weight capacity. 4 out of 5 is the issue with inflation and what's correct.

David M.

3/4/2022

Its been a year since last review, still havent had any issues with the pin box. Works well and provides a smooth ride under most conditions. If you run into rough patches on the road youll feel it and in my opinion there isnt anything made today that will eliminate that type of chucking. I also have airbags on my truck and it still happens. Now for the pin box 1. It works as advertised and improves the ride substantially. 2. The pin box is very well built and no issues period. 3. One issue is the air valve on top of the pin box which makes you get up into the truck bed to fill it with air. What would be a improvement would have a extension that attaches to the valve that would allow you to add air without having to get into the truck bed. To summarize, this pin box has been a great investment and if youre looking a replacement box, youll be happy you purchased this one.



by:

Excellent company to deal with. Top notch product



by:

Can’t believe what a difference it made. Pulling a 38’ Avalanche with a 2019 Ram dually and we now glide over formerly rough bridge approaches. I’m 76 and my brother-in-law is 69 and we installed it at our RV Park in about 20 minutes! That included removing the old one! Recommending it to all my friends!



by:

This is the second Trailair hitch I have purchased. Fast shipping and easy to install on our new DRV Fullhouse JX390. Much better than the Mor-Ryde hitch DRV uses. Now no bounce in the truck on rough roads.



by:

The package arrived with installation parts missing. It was very disappointing. etrailer was notified and sent another package, hopefully this time with all parts needed for installation.



by:

The trailair pin box I ordered and received looks be be everything I was told it would be. I have not bin able to road test the hitch yet as it's only early March and living in north east Minnesota, we still have about two feet of snow . I'm sure hoping it works as well as its supposed to.

Dean S.

3/7/2021

I lovin the ride with this air ride pinbox. It works well for the ride on both truck and trailer, glad I decided to make the investment.



by:

Smooths out the porpoising when traveling over rough roads and at uneven bridge abuttments.



by:

Stout, quality pin box. Quick shipping and great service. The final condition of the shipping container and some heavy scaring on the pin box left much to be desired from the freight carrier, but scuffs don't effect the functionality of the component.



by:

Really made a positive improvement in towing my RV. The hitch absorbs the shocks from the trailer when towing and therefore the ride is much better in the tow vehicle. I also think it works the other way as well, RV is somewhat shielded from shocks the tow vehicle is experiencing. Am so impressed that I moved it over to our new RV. Well worth the time and cost to buy and install.



by:

This is the 2nd air ride hitch i've purchased. First one was on another 5th wheel and stupidly didn't keep it when I traded for the one I have now. They work great! It takes the shock out of the bumpy roads and keeps camper insides from re-arranging when traveling. Very happy with the hitch.



by:

Have the Lippert Components Trailair fifth wheel king pin installed on our 40 foot Big Country has made the difference in pulling the trailer down the road. I would recommend the King Pin if pulling a fifth wheel trailer. Now we don't even know it behind us. Great Product.



by:

Took all the transfer of trailer hunting out of tow vehicle as you travel. Also give me more turning clearance on short bed F250.

Dale H.

10/5/2021

Makes hook up a snap!



by:

I will not own another 5th wheel without this type of pin box. It absorbs the shock and improves the ride tremendously. It was recommended to me by a friend and I would do the same. Well built and worth every penny.



by:

Very satisfied with the TrailAir. I love it so much that I went ahead and put air bags on my truck to also help. I'm looking forward to Easter for our first camping trip of 2018. Thanks for checking in.


25
145
Show More Reviews

See what our Experts say about this Lippert Fifth Wheel King Pin

  • Installation Instructions for TrailAir 5th Wheel Trailer Pin Box for Lippert 1621 Pin Boxes
    There really is not too much to installation of the TrailAir pin box # LC158778. You are going to need some assistants given the weight of pin boxes. But really all you do is unbolt and remove the old one and then bolt the new one in its place.
    view full answer...
  • Solution for Lowered Tailgate on 2016 Ford F-350 Being too Close to 5th Wheel Trailer when Coupling
    If you have a Lippert 1621 pin box that measures 17-3/4" from the center of the king pin to the center of the first row of bolt holes then I do have a pin box that will give you a little bit of additional clearance. The Trailair Air Ride 5th Wheel Pin Box # LC158778 is a direct replacement for a Lippert 1621 pin box and measures 19-1/2" from the center of the king pin to the first row of bolt holes (see attached picture). Aside from this pin box all of the options have the same measurement...
    view full answer...
    Image 1 for
  • Recommended Pin Box Replacement For 2007 Forest River Wildcat 24RL
    From what I can find, it looks like your 2007 Forest River Wildcat 24RL has a Lippert 1621 pin box. Using that pin box number as a reference, I recommend the Trailair Air Ride 5th Wheel Pin Box - Lippert 1621 - 21,000 lbs # LC158778. This drastically reduces chucking and minimizes bounce as well as road shock. The internal air bag and built-in strut provide a scissor-like motion to compress and rebound for a smooth ride. Another great option is the Reese 5th Airborne Premium Fifth Wheel...
    view full answer...
    Image 1 for
  • Altering Trailair L05 for Lippert 1621 Pinbox to Fit Lippert 1116
    Unfortunately, the Lippert 1621 and the 1116 are different enough that the L05 Trailair can't be safely modified so that it'll work on a 1621. Enlarging or changing the hole position on the pin box can weaken the metal, and cause the attachment point between the pin box and the 5th wheel to fail. I've linked you to our FAQ article about pin boxes. At the bottom of the page, you can see diagrams and tables showing the various bolt hole spacing that the various pin box models use. I'd...
    view full answer...
  • Difference Between Lippert 1621 Pin Box And 1621SHD Pin Box
    The difference between the 1621 and the 1621SHD is weight capacity and how many bolts is required to mount it. The 1621 uses 4 bolts for mounting. The 1621SHD requires all 6 bolts to be used.
    view full answer...
  • Trailair Pin Box for Lippert 1621 that is Compatible with Andersen Ultimate Connection
    You'd want the Trailair pin box part # LC158778 that you referenced which is the correct fit for a Lippert 1621 pin box and is perfectly compatible with your Andersen Ultimate fifth wheel hitch as well.
    view full answer...
  • Replacement Air Bag for Lippert TrailAir Pin Box
    I have a solution for you, but you're not going to be able to use a Firestone vehicle airbag to replace the bag on your TrailAir Pin Box. Instead you'll need to use the Replacement Air Spring for Trailair 5th Wheel Pin Boxes # LC432404 This airbag will work as a replacement on the following models: Air Ride - Lippert 1621 with 21,000-lb capacity ( # LC158778 ) Air Ride - Lippert 0719 with 18,000-lb capacity ( # LC179879 ) Flex Air - Lippert 0719 with 18,000-lb capacity ( # LC328484 ) Flex...
    view full answer...
  • Will Trailair Pin Box for Heartland Landmark Savannah Void Trailer Warranty
    From our previous experiences with the Landmark Heartland Savannah we have found that it has a Lippert 1621 pin box from the factory. The Trailair part # LC158778 is made to fit as a replacement for that pin box and since it is also made by the same company Lippert it would not void any warranties.
    view full answer...
  • Does Air Bag of Trailair Pin Box LC158778 Inflate With Trailer Connected or Disconnected
    You will want to have the truck connected to the trailer when inflating the air bag of the Trailair part # LC158778 so that you can determine what the proper pressure will be to get it sitting where it needs to be. If you are asking about whether or not the bag itself prefers to be inflated with the load of the trailer on it or not that would not matter. The bag will inflate just fine with a trailer connected. The load would not affect anything or change the pressure.
    view full answer...
  • 21k Ultra-Fab Trailair Recommendation for Lippert Pin Box with 341369 Pin Box
    Based on the information you listed you have a Lippert 1621 pin box. The correct Trailair replacement pin box that you would want is the # LC158778 this is rated at 21,000 lbs.
    view full answer...
  • Recommended Pin Box Replacement For Lippert 1621 And Fifth Wheel Trailer Weighing Over 19,000 Lbs
    With the weight you said your trailer weighs when fully loaded, I recommend a pin box that is designed to be able to handle that weight. The pin box I recommend is the Trailair Air Ride 5th Wheel Pin Box, part # LC158778. This pin box is designed as a replacement for the 1621 you have on your trailer and it has a 21,000 lb weight capacity. This system has an internal air bag and built-in strut that helps reduce the jarring and chucking. I have attached a link to a product review video...
    view full answer...
  • Replacement Air Bag for Ultra-Fab Trailair Air Ride King Pin # LC158778
    I spoke with my contact at Trailair and the replacement air spring / bag that you will need for your Ultra-Fab Air Ride 5th Wheel King Pin, # LC158778, is part 156622.
    view full answer...
  • What is the Recommended Initial PSI Recommendation for a Trailair Pin Box
    According to Ultra Fab there are many factors that can effect air pressure such as the size of the air spring in diameter and height, the pin weight of the trailer, the mechanics of each individual hitch, altitude and air temperature. Ultra Fab has stated that usable air pressures can range from 20 to 120 psi. Therefore a specific air pressure is not recommended. Instead it is recommended to inflate the air bag to maintain a ride height. To determine the ride height Ultra Fab has indicated...
    view full answer...
    Image 1 for
  • Anderson Ultimate Connection Hitch Compatibility with Lippert Pin Box
    The Andersen Ultimate Connection 5th Wheel Trailer Hitch System with Adapter - 20,000 lbs # AM3200 is compatible with the Curt Pin box like # LC158778. If you want to use a Curt Flex Air 5th Wheel Pin Box # LC328492 then Andersen states you need to use their flex lockout kit. There is too much movement in the pivot of the Flex cushion for that hitch without locking it out.
    view full answer...
    Image 1 for
  • Can You Use a Lippert Trailair Air Ride Pin Box with an Andersen 5th Wheel Hitch
    Unfortunately you cannot use an Air Ride pin box like the Trailair Air Ride 5th Wheel Pin Box # LC158778 with the Andersen Ultimate Connection 5th Wheel Trailer Hitch System # AM3200. The Air Rides cannot be used with Gooseneck adapters which the Andersen 5th wheel connection falls under. You instead would want to use a hitch like the Curt A20 5th Wheel Trailer Hitch # C16140 which would attach to industry standard rails. If you have a short bed truck you would want the slider version which...
    view full answer...
  • Correct Trailair Air Ride Pin Box to Replace Lippert 1621HD
    I can help you out with the correct Air Ride pin box that will replace your Lippert 1621HD with an 18,000 lb capacity. The correct one, that will retain the capacity of your current pin box (and in fact exceed it) is the following part number: - Trailair Air Ride 5th Wheel Pin Box - Lippert 1621 & 1621HD # LC158778 The Air Ride # LC158778 has a 21,000 lb capacity so while it only has a bit more capacity than your current 1621HD, it will be a whole lot more comfortable. The combination...
    view full answer...
  • Fifth Wheel to Gooseneck Hitch Adapter Recommendation for Truck that Needs to Tow Gooseneck Trailer
    I think your best solution would be to go with an adapter in the bed of your truck now that is setup for a fifth wheel hitch. The easiest way to do this would be to use a fifth wheel hitch to gooseneck adapter like part # HT31368. This will install in the fifth wheel rails you have in your truck and will allow you to tow your new gooseneck hitch. I attached a review video for you to check out as well.
    view full answer...
  • How Many Bolts Get Used to Install a RotaFlex Pin Box on a Trailer
    When you attach a RotoFlex pin box like the part # LC328330 you will need to use the same amount of bolts per side of the pin box like that the original pin box used to secure to the trailer frame. Some setups will require only 4 bolts and some may require 5 or 6. It really depends on the trailer and what was originally on the trailer.
    view full answer...
  • Recommended Trailair Replacement Pin Box for 2011 Heartland Big Horn 3610RE Trailer
    I checked the Heartland RV website for the pin box specs on your 2011 Big Horn 3610RE but this information was not available online. So, you'll just want to take note of the current pin box brand and part number to help identify a suitable Trailair cushioned pin box. The particular TrailAir part you referenced, part # LC158778, fits in place of Lippert 1621 or Ultra-Fab Tri-Glide L05 pin boxes. Simply click on the included link to select your pin box number to then see replacements.
    view full answer...
  • Purpose of Two Nuts on Top of Trailair 5th Wheel Pin Box LC158778
    The two nuts visible on the top of a Trailair pin box like # LC158778 are the attachment points for the internal air spring. If you look at the replacement spring part # LC432404 you'll see the two threaded posts that those nuts fit on to hold the spring in place. If your 5th wheel trailer sways when you accelerate you can check that you have air pressure in the spring and also check your trailer tire pressure to ensure it is correct all the way around. Trailer loading can also affect...
    view full answer...
    Image 1 for
  • Air Ride Pin Box for an 18,000 Pound 5th Wheel Trailer with Lippert 1621HD Pin Box
    For an air ride pin box that will fit in place of your 18K rated Lippert 1621HD pin box you have a couple of options. You can use the 5th Airborne unit # RP78FR. You could also use the 21K rated Air Ride pin box, # LC158778.
    view full answer...
  • Air Ride Pin Box Replacement for a Mor/Ryde Pin Box sp872-1621ld on a 2017 Winnebago Voyager
    It looks like the Mor/Ryde pin box on your 2017 Winnebago Voyager has the bolt pattern of the Lippert 1621 pin box. for air ride pin boxes that fit this pattern you could use 5th Airborne pin box # 5AB-E1621-610 or # RP78FR, Flex Air # LC328492, or TrailAir # LC158778. Out of these options the latest and greatest is the Flex Air # LC328492. I have linked videos of these pin boxes for you.
    view full answer...
  • Recommended Air Ride Pin Box for 2014 Bayhill Evergreen 385bh 5th Wheel
    If you indeed have a Lippert 1621 pin box (you can see the diagram I've provided to confirm), I'd recommend an Ultra-Fab pin box, which is actually manufactured by Lippert Components. Their Trailair Tri Flex, part # LC328492 would do an excellent job isolating your tow vehicle from bouncing, chucking and jarring the fifth wheel would experience, making for a much more pleasant ride. This pin box has a maximum capacity of 18K, which should be plenty of capacity for your 5th wheel. A less...
    view full answer...
    Image 1 for
  • Difference Between The Lippert Trail Air And Reese 5th Airborne Pin Boxes
    Having the air bag mounted internally like the 5th Airborne Premium Fifth Wheel Air Ride Coupler # 5AB-E1621-610 is going to protect it from the elements and UV rays that could prematurely wear the bag down. Having the air bag on the outside like the Curt Air Ride 5th Wheel Pin Box - Lippert 1621 & 1621HD - 21,000lbs # LC158778 will leave it susceptible to the elements and UV rays, but these air bags are designed to withstand the elements so you wouldn't see a massive difference in the...
    view full answer...


< Previous
123. . .12



Do you have a question about this Fifth Wheel King Pin?


Info for this part was:

Employee Joe V
Installed by:
Joe V
Employee Jeff D
Installed by:
Jeff D
Employee Jackie C
Expert Research:
Jackie C
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Victoria B
Expert Research:
Victoria B
Employee Lindsey S
Edited by:
Lindsey S
Employee Kathleen M
Updated by:
Kathleen M
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Hannah L
Updated by:
Hannah L
Employee Mike S
Updated by:
Mike S
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Alan C
Video by:
Alan C
Employee Chelsea B
Written by:
Chelsea B
Employee Hayden R
Test Fit:
Hayden R
Employee John A
Test Fit:
John A

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.


Product Experts Available Now!
Call 1-800-940-8924