Trailair Flex Air 5th Wheel Pin Box - Lippert 1621 - 18,000 lbs

Trailair Flex Air 5th Wheel Pin Box - Lippert 1621 - 18,000 lbs

Item # LC328492

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Fifth Wheel King Pin

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Shipping Weight: 232 lbs

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Trailair Flex Air 5th Wheel Pin Box - Lippert 1621 - 18,000 lbs 1621 LC328492
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  • 1621
  • Lippert
  • Reduces Bounce and Jarring
  • 18000 lbs GTW
  • Pin Box Upgrade
  • Lippert Components
  • Fixed Turret
  • Cushioned
Flex Air drastically reduces chucking, absorbs road shock, and minimizes bounce. The internal air bag and built-in strut work with the rubberized pivoting head to achieve a dramatically smoother ride. Replaces Lippert 1621 pin boxes. Call 800-298-8924 to order Lippert Components fifth wheel king pin part number LC328492 or order online at etrailer.com. Free expert support on all Lippert Components products. Guaranteed Lowest Price and Fastest Shipping for Trailair Flex Air 5th Wheel Pin Box - Lippert 1621 - 18,000 lbs. Fifth Wheel King Pin reviews from real customers.


  • All Info
  • Reviews (34)
  • Q & A (240)
  • Videos (1)
  • Photos
  • Why etrailer?

Lippert Components Fifth Wheel King Pin - LC328492

Flex Air drastically reduces chucking, absorbs road shock, and minimizes bounce. The internal air bag and built-in strut work with the rubberized pivoting head to achieve a dramatically smoother ride. Replaces Lippert 1621 pin boxes.


Features:

  • Air ride pin box with a pivoting head replaces standard pin box on your 5th-wheel trailer to cushion your ride, improve handling, and limit strain on truck and trailer
    • Drastically reduces chucking
    • Virtually 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
  • Pivoting head limits chucking by allowing controlled movement of the king pin within your hitch
  • Rubber compound built into the head absorbs road shock
    • Reduces wear and tear on trailer
  • 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 5th-wheel pin box
  • Weight capacity: 18,000 lbs
  • 1-Year limited warranty


Notes:

  • Do not use the Trailair Flex Air pin box with any type of gooseneck adapter.
  • Because of the size of this item, it ships via truck freight.

Getting there is half the fun, right? Not if you're being bumped, jerked, jammed, and pushed around from the chucking, road shock, and bounce 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 Trailair Flex Air 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. But what sets the Flex Air apart from other air ride pin boxes is the addition of a pivoting head. This head, along with its built-in rubber compound, provides additional cushion, absorbs road shock, and reduces chucking for a significantly improved ride.


Rubber Compound and Internal Air Bag Absorb Road Shock

Lippert Flex Air pin box has a rubberized pivoting head

A heavy-duty rubber compound is built into the head assembly of the Flex Air pin box. This rubber is the first defense against road shock. It helps to absorb the bumps and vibrations experienced when towing a fifth-wheel trailer over rough roads. 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. The shock-absorbing rubber inside the Flex Air takes the beating so there's less wear and tear on your trailer or RV and you get a smoother ride.


Lippert Flex Air pin box has a shock and air bag

Because the rubber may not be able to absorb all of the road shock that you experience, the Flex Air also implements air ride technology to virtually eliminate shock. When you encounter uneven terrain on your trip or hit a pothole on the highway, the Flex Air 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, and tow vehicle frame from enduring a rocky ride.


A built-in strut, or shock, controls the Flex Air'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.


Pivoting Head Reduces Chucking

Lippert Flex Air pin box has a pivoting head that reduces chucking

The pivoting head on Flex Air allows for controlled back and forth movement of the king pin to reduce the uncomfortable jarring known as chucking. Unlike a rigid pin box that has little give at the point where the trailer and the hitch are connected, the Flex Air can pivot slightly to compensate for those times that your trailer suddenly pushes or pulls on your tow vehicle. Because the pin box head - not the king pin itself - is moving, the chucking that often occurs when the king pin jerks around inside the hitch is significantly reduced.


Simple Setup and Installation

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


The internal air bag should be inflated after the Flex Air 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.



328492 Lippert Components (LCI) Flexair by Trail Air Fifth Wheel Kingpin Box for Lippert 1621



LC328492 Installation InstructionsInstallation Details LC328492 Installation instructions

This Product Fits The Following Vehicles

2019 - 2019 Forest River Sabre Fifth Wheel 36BHQ

2016 - 2016 Jayco Pinnacle Fifth Wheel 36KPTS Luxury




Video of Trailair Flex Air 5th Wheel Pin Box - Lippert 1621 - 18,000 lbs


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




Video Transcript for Lippert Trailair Flex Air 5th Wheel Pin Box Manufacturer Demo

Many people love the spacious luxury of Fifth Wheel RVs but don't love the tugging, jostling and chucking the comes with towing. Towing can be an exhausting experience and RVs can really take a lot of abuse from bumpy roads. Protect your RV and improve you towing experience by upgrading the the Flex Air Pin Box by Lippert Components. The Flex Air Pin Box combines our time-tested trail-air air-ride technology with our rota-flex pivoting head to create an unparalleled ride. Eliminating chucking and the vertical tug-of-war between the Fifth Wheel and tow vehicle. The Flex Air Pin Box utilizes an air bag as a buffer between the tow vehicle and Fifth Wheel RV to absorb road shock and vibrations. It's integrated oil shock absorber handles rebound action, dampening kick-back and controlling chucking. The Flex Air Pin Box also features a pivoting head in its lower jaw that controls the vertical tug-of-war between the two vehicle and Fifth Wheel RV and its rubberized compound provides an additional buffer to help protect the Fifth Wheel RV from jarring motion.

Air ride suspension has been standard on most tractor trailers for years and we want Fifth Wheel RV owners to enjoy the same benefits. Upgrade today and enjoy the comfort of air with a Flex Air Pin Box by Lippert Components. .


Customer Reviews

Trailair Flex Air 5th Wheel Pin Box - Lippert 1621 - 18,000 lbs - LC328492

Average Customer Rating:  4.5 out of 5 stars   (34 Customer Reviews)

Flex Air drastically reduces chucking, absorbs road shock, and minimizes bounce. The internal air bag and built-in strut work with the rubberized pivoting head to achieve a dramatically smoother ride. Replaces Lippert 1621 pin boxes.

- LC328492
by:

Really helped take away most of the jerky ride we used to get from our solid king pin. The air bag helps to smooths out rough roads. As per the advice of Lippert customer service I made 5 pound adjustments until I found the best ride. I keep a portable battery operated air pump along for adjustments. My airbag had a small air leak at the valve threads when new. After resealing the threads all is good. 513070


Comments

Still working great. The smooth ride makes towing much more enjoyable.

Wesley - 05/28/2019

55786

- LC328492
by:

Love the pin box, suggest it to all 388409



- LC328492
by:

The Flex Air does exactly what I wanted it to do. It absorbs the shock of bumps and transfers that energy to the hitch, not the truck or the fifth wheel. Installation was straight forward with a little bit of planning. It did require I adjust the fifth wheel hitch in my truck as this is a little longer than the original and extends downward more. I was able to modify the settings on my hitch to accommodate. Overall, I've happy I added this to my RV. 375017



- LC328492
by:

Install went pretty smooth. Did it from the bed of the truck, using a motorcycle jack in front and a small hydraulic in back. Make sure your torque wrench can dial to 160 ftlbs. I will update after I tow it!!! 602475



- LC328492
by:

What a difference this pin box made in towing my fifth wheel. Excellent product, makes towing a joy! Took the bumps and jerking out of towing. Went to 12 states and 14 National Parks up mountains and down back roads after installing this pin box. Put on over 12,000 Miles. It’s worth every penny I paid for it. Will never own a fifth wheel with out one. Thank you for making this wonderful product! 501084



- LC328492
by:

This is some of the best money we ever spent. It truly makes a huge difference in the ride - even on the roughest roads and bridges. Wouldn't pull a long trailer without it now. The handling is so much better - the trailer doesn't try to 'drive' the truck for you. If you want a better, smoother ride - this is what you need. No more bucking felt. Install was very easy. Highly recommend this product - you won't be disappointed. 351642



- LC328492
by:

The product that I ordered was what I received the person I talked to was very noligable and helpful Thanks 572652



- LC328492
by:

Installed flex air myself with 2 friends used a floor jack on the bed of the truck to raise the flex air ,went right in .the flex air works great you can see it flex going down the road .the ride is very smooth. Remember to air it up before you connect each time mine takes about 105psi but I have a heavy 5th wheel toyhauler .well worth the money a lot less than campingworld and other places. With the flex air your truck and 5th wheel each will ride so much smoother and less stress on both vehicles. 5 stars from me . 552548



- LC328492
by:

Great product. Did it stop all the chunking--NO but it helped take away half the beating we were getting from the 5th wheel. Worth the investment! 538610



- LC328492
by:

Gives better ride than my original pin box, but not worth the extra money. Also, due to the added length, I had to remove my fold up bed cover. Air bag needs inflation before each use. 324839



- LC328492
by:

1st one had wrong bag(to small and would not lift trailer) they paid for all shipping etc for exchange. Hard to tell how well it works because I have bags also but overall I'm pleased. 312386


Comments

Mixed bag, it functions perfectly but I also have air bags on truck so it performance is improved by that. I had problems with not being able to fit air fill nozzle on filler, clearance issues. Rubber chucking damper pad got squished out backside of hitch requiring me to disassemble and install screws to hold rubber in place. And it just looks like a clap trap. Ive been looking at the Reese® Goose Box™ Gooseneck Coupler.But I also have the metal rollup tauno cover that causes clearance issue with both. So to sum it up, it works.

Tom - 11/01/2017

30246

- LC328492
by:

4 stars as I have just recently installed this although I received it over a year ago. I just put 750 miles on it and experienced almost every PAVED road condition imaginable and it worked great. I can't imagine what that would have been like with the stock pin box. 4 stars because I still need to see how it performs off road and I am just a few days into using it on a trip covering OR, ID, MT and WY so I still have my personal evaluation to complete and need more drive time to see if anything fails on it. Installation was a breeze but it's a heavy hitch so caution is advised. 572537



- LC328492
by:

Good morning, The reason for buying this item was to controled the tugging, jostling and chucking of our RV. Im not disappointed with the result ,it works very good and doing that will prevent wear and tear of the RV. The installation is very easy. All in all very satisfied. Service was also excellent.. Thanks 529925



- LC328492
by:

I will be on the third flexair pin box when it gets here on the 21st of November 2016. The problem iIm having is with the lower roto flex portion. The rubber block shifts and I have talked to others with the same problem. Lippert has been great about the replacement, But the the hassle of replacing this three times in one year is not worth it. 318083



- LC328492
by:

I am very happy with my Flex Air king pin. The customer service folks worked with me so I could have it before going on vacation. The old one came off and the new one fit right up. I used a forklift to do the lifting. it sure made the trip to DC more enjoyable. 292954



- LC328492
by:

Having not pulled a fifth wheel with a traditional pin box setup I have nothing to compare it to. Watching the suspension action over various road conditions I would have to assume that it is doing a very good job of stopping the transfer to the trailer. We have found that we have to keep an eye on the air pressure because it seems to lose air over time (months). We keep a portable air pump in the trailer to cover this situation. The only other observation I have is that the design does seem to carry the nose of the trailer a bit higher. My truck has had no suspension adjustments made to it and the hitch-head is set at it's lowest setting. I can't blame the pinbox alone because there are many contributing factors, but an element of consideration none-the-less. All in all it's a sturdy, well built, piece of hardware that adds a third layer of suspension to the traveling experience. The health of the trailer will definitely benefit from its use. I have had multiple comments made by other campers. 333916



- LC328492
by:

First, about etrailer. As always, their service was outstanding. They honored their low price guarantee without question and shipping was fast. I upgraded from a Trailair Air Ride pin box with a fixed turret. That pin box helped with bouncing and jarring, but I still got a lot of "chucking". This FlexAir pin box solved that problem as well. Installation was a breeze, although you must make sure you have enough adjustment on your trailer to mount this pin box higher up than your existing pin box. I had to mount it at the very highest set of holes on my trailer. Lipperts web site has specs on this pin box and installation instructions, including measurements and torque specs. With the help of a friend and using the bed of my pickup truck, we unbolted the old one and bolted the new one in. Took about an hour and that was not hurrying. I took the trailer out this past weekend with the new pin box and hit some pretty bad roads. Wow! What a difference this pin box makes. I can only describe the ride one way. Smooooooth. I am very pleased with both etrailer and this product. It's pricey, but to me, pulling a large fifth wheel trailer, it's worth every penny. Highly recommended. 287066



- LC328492
by:

I have used my Flex Air for over one year and put around 3000 miles on it. I purchased this for one reason to reduce bucking when I it bumps in the road. I can safely say that it has virtually eliminated the bucking. It has also made the ride a lot smoother. I would highly recommend the Flex air. I did my own install of this product by my self. My rig 2018 Toyota Tundra with a Husky 16 KW Hitch 2017 KZ Durango 30 ft. 637982



- LC328492
by:

Love this product 625338



- LC328492
by:

After getting past the shipping companies mess ups, finally installed the new pin box with the help of a few friends. Had to bring toyhauler to dealer yesterday and the difference in the ride was amazing. We are not known for exceptionally smooth transitions on bridges but this hitch took the jarring out of the ride. 582788



- LC328492
by:

Having owned a previous version of this king pin I know and understand how it works and is why I replaced it with a similar product. The previous version was the tri-glide model that was know for going bad, which mine did. I’ve been happy with this newer version other than it seems to loose air over time. 577488



- LC328492
by:

We sold the 5th wheel about 8 months after getting this hitch. However, we used it for about 6,000 miles before we sold. The hitch noticeably improved the ride and handling of our 5th wheel. There was less jerking and bumping and overall made the drive quite relaxing. I would recommend the hitch. 514206



- LC328492
by:

Tire leaks down about 2 or 3 weeks, also there is no instructions on how much air to put in the tire. It is a guessing game. It is not worth the money that I paid for it. 491592



- LC328492
by:

Like the product and it seems to help balance the ride. 491587



- LC328492
by:

The air ride pin box was very easy to install and after towing once i was solid on them it is a very nice ride. 459219



- LC328492
by:

Very happy with the hitch. Makes the towing easier and less stressful. 427818



- LC328492
by:

This product was shipped br etrailer and arrived on time the works as expected as far as etrailer there personal are knowledgeable and very helpful thanks etrailer 419766



- LC328492
by:

Great product for a better ride. It helps with the bounce of the truck when you hit rough roads and makes the ride normal. Love this product best money ever spent. 389284



- LC328492
by:

works great 327303



- LC328492
by:

Just satisfied. made big difference in ride of camper and truck. Would recommend to anyone . Pull camper to Florida loved the ride. 326002


Comments

every thing has worked very good,my wife even notice the difference.were very please.

gary f - 12/18/2017

32045

- LC328492
by:

Bolt holes did not match up other than that I like it 317995



- LC328492
by:

This is the best. I installed it on 2016 BIGHORN 3750FL. It pulls like a dream very smooth,even on rougher roads. I would recommend this type of pinbox for any 5th wheel. 282626



- LC328492
by:

Overall I'm happy with the results. I already had a Roto Flex pin box, so I haven't seen a huge ride improvement. It seems to take a lot of jarring out of the trailer. 273470



- LC328492
by:

makes a big trailer pull more like a little one etrailer was freiendly did what they said will order from again 249249


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Ask the Experts about this Lippert Components Fifth Wheel King Pin
Do you have a question about this Fifth Wheel King Pin?


  • Comparing Trailair Flex Air 5th Wheel Pin Boxes For Lippert 1621 Pin Box Replacement
  • The difference between the Trailair Flex Air 5th Wheel Pin Box - Lippert 1621 - 18,000 lbs # LC328492 and the Trailair Flex Air 5th Wheel Pin Box - Lippert 1621 - 21,000 lbs # LC369535 is only in the weight capacity. The air spring and shocks are the same on the unit designed for 21,000 lbs, so just the mounts on the trailer and the pin box itself is stronger. The Lippert 1621 pin box allows for either weight, so I recommend the one that is most compatible with the trailer GVWR. Either...
    view full answer...

  • Differences Between Lippert Flex Air Pin Boxes
  • The Lippert pin boxes you are referencing have a couple of differences. The most important difference between the two is that the Long Jaw, or Trailair # LC328492 will replace Lippert 1621 model fifth wheel pin boxes, while the Medium Jaw, or Trailair # LC328484 replaces Lippert 0719 fifth wheel pin boxes. The Trailair Flex Air 5th Wheel Pin Box # LC328492 is also 17-3/4" from the front row bolts to kingpin center and 25-5/8" from rear row bolts to kingpin center, while the Trailair...
    view full answer...

  • Correct Trailair Replacement for Lippert 1621 Pin Box
  • I spoke with a representative of Lippert who told me that you have a Lippert 1621 pin box with a 15,500 lbs capacity. For a Trailair you could use Trailair Flex Air 5th Wheel Pin Box # LC328492. These pin boxes are going to substantially reduce the amount of jarring and chucking you experience by absorbing the road shock with an air bag. It is a simple bolt-on design and has a capacity of 18,000 lbs, though Trailair # LC369535 would also work for you and has a capacity of 21,000 lbs....
    view full answer...

  • Benefit of Using 5th Wheel Pin Box Rated for More Than Trailer Actual Weight
  • The Lippert TrailAir Flex Air 5th Wheel Pin Boxes # LC328492 and # LC369535 are both bolt-on replacements for the model 1621 OEM pin box. Their difference, as you noted, is in their rated weight capacities; 18K for # LC328492 and 21K for # LC369535. Either one will be fine for use with a compatible trailer with a GVWR of 16,500-lbs. But yes, safety margin in the form of extra capacity is a good thing. The relatively low incremental cost for the 21K pin box over the 18K makes a pretty...
    view full answer...

  • Is a Capture Plate Needed to use Demco Hijacker With Trailair Flex Air on 2017 Ford F-250?
  • I spoke with a representative of Demco who confirmed for me that you will need to use Demco Hijacker Autoslide Capture Plates # DM6171 along with the Demco Hijacker # DM8550024 fifth wheel hitch if you have a Trailair Flex Air such as # LC328492. The Hijacker Autoslide # DM8550024 is a confirmed fit for your 2017 Ford F-250 with the factory prep package; I've added a link to a video review of the hitch and capture plate for you to take a look at as well.
    view full answer...

  • Should Pin Box or Suspension be Upgraded to Reduce Jarring and Bouncing While Towing
  • A cushioned pin box, like the Trailair Flex Air 5th Wheel Pin Box # LC328492 for a Lippert 1621 replacement that you referenced, will greatly improve the ride between your 2016 Ram 3500 and your Forest River Chaparral 37FL whereas upgraded suspension parts on your trailer are geared more towards the ride quality of your trailer. If the jarring that you are getting is from the trailer bouncing around then I recommend starting with suspension enhancement. From the info you gave it sounds...
    view full answer...

  • Best Pin Box Upgrade Recommendation for 2017 Grand Design Momentum with a 1621 Pin Box
  • For your 2017 Grand Design Momentum that has a Lippert 1621 pin box the best upgrade we have is the Trailair Flexair part # LC328492. This has cushioning vertically and a pivoting king pin plate that allows for cushioning front to back as well. This will give you a noticeable smoother ride quality than what you currently have.
    view full answer...

  • How to Reduce Chucking and Jarring While Towing a 5th Wheel Trailer
  • Chucking and jarring while towing a 5th wheel trailer (or any trailer for that matter) is unavoidable because the trailer itself is not one piece with your vehicle. When your truck starts to move forward from a stop your trailer is still sitting static and so there will be a slight jolt; the same thing happens when you slow down. Since the front end of your trailer is connected to your truck, when your truck starts to slow down your trailer is still moving forward so it will give you a...
    view full answer...

  • Sidewinder Pin Box Recommendation for 2018 Grand Design Momentum 351M For Short Bed Turn Clearance
  • Since your 2018 Grand Design Momentum has a Lippert 1621 pin box the Trailair Flexair part # LC328492 will fit and give you a much smoother ride but will not make a noticeable difference in clearance between truck cab and trailer. A better option for that would be the 5th Airborne Sidewinder part # RP61422 which fits the Lippert 1621, is also cushioned, but moves the pivot point back 22.5 inches so that you can tow your trailer with your short bed truck and fixed hitch. Only other way...
    view full answer...

  • Replacement Trailair Flex Air 5th Wheel Pin Box for Lippert 1621
  • No, the Lippert 1621 will not have any issues with an 8' truck bed. The trailer will just sit a little further back. I spoke to my contact at Lippert and they stated that the general rule of thumb for a truck with an 8' bed would be to use a short/medium pin box. However, this could in turn create an interference issue with the tailgate as you mentioned. It will also put more stress on the trailer's chassis. Therefore, I recommend replacing the Lippert 1621 pin box that came on your trailer...
    view full answer...

  • How to Determine Fifth Wheel Pin Box Model
  • If you are unable to contact your trailer's manufacturer with your VIN to find the factory pin box model number there are some steps you can take which will allow you to determine what pin box model you have so you can purchase a new FlexAir. To do this you will need to follow the steps in the linked help article, which I will go over with you. Start by selecting your pin box style like in the accompanying photo (which you will also find in the help article). You will then need to use...
    view full answer...

  • Trailair Flex Air Pin Box Recommendation to Replace 1621 Pin Box
  • We have two Flex Air pin boxes that are a confirmed fit for replacing a Lippert 1621 pin box like what you have. We have the part # LC328492 which has an 18k capacity and the part # LC369535 which has a 21k capacity. This will work well with your 2017 Ram 2500 that has air autoleveling suspension. They would not fight each other or anything.
    view full answer...

  • How to Use Lippert Flexair Pin Box with Demco Hijacker Autoslide Fifth Wheel Hitch
  • The correct capture plate with the Lippert Flex Air pin box # LC328492 is the # DM6171 that you referenced. We confirmed this with our contact at Demco so we know it will work well. There isn't a size difference between teh 18k Demco Autoslide part # DM8550034 and the 21k part # DM8550035. There is about a 25 lb difference.
    view full answer...

  • Replacement Pin Box to Reduce Chucking on 5th Wheel Trailer with Lippert 1621 Pin Box
  • For the Lippert 1621 pin box the most inexpensive option that will improve the chucking and overall ride quality when towing your 5th wheel trailer is the Rota-Flex, # LC328330. It uses a pivoting mechanism and rubber compound to dampen chucking. This version is rated for 18,000 pounds. there is also a 21,000 pound version, # LC328329. The next step up is the 5th Airborne # 5AB-E1621-16K which uses both a shock and an air bag to reduce chucking and vertical movement. It will be more...
    view full answer...

  • Air Ride Pin Box and Locking Plate for Lippert 1621 Pin Box and HiJacker 5th Wheel Hitch
  • To replace your Lippert 1621 pin box I recommend the 5th Airborne pin box # 5AB-E1621-610. There aren't a lot of options for locking plates for the various air ride pin boxes so this is your best option. The locking plate you would use with it and your Hijacker is # DM6062.
    view full answer...

  • Air Pressure Range for a TrailAir Flex Air 5th Wheel Pin Box
  • Air pressure for the TrailAir pin boxes such as # LC328492 can range from 20 to 120 psi. There isn't a specific amount of pressure you have to use. Instead it is recommended to inflate the air bag to maintain a level ride height but do not inflate the bag over 120 psi. You could also get a replacement shock, # LC177223.
    view full answer...

  • Recommended Replacement Pin Box for Lippert 182209 1621 on 2010 KZ Durango LX
  • I reached out to my contact at Lippert and you do have the 1621 pin box on your 2010 KZ Durango LX. If you are looking for a cushioned pin box, I recommend the Trailair Flex Air 5th Wheel Pin Box - Lippert 1621 - 18,000 lbs # LC328492 or the 21,000 lb # LC369535. Either of these will work well and they not only have the air ride but also have a rubber compound and moving head to be the fist defense against road shock and chucking. If you desire greater turning clearance, then the 5th...
    view full answer...


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




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Info for this part was:

Expert Research:
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Expert Research:
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Jeffrey L
Photos by:
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Written by:
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Updated by:
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