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  1. Fifth Wheel King Pin
  2. Lippert
  3. Lippert 1116
  4. 21000 lbs GTW
  5. Upgraded Pin Box
  6. Absorbs Road Shock and Reduces Chucking
Trailair Air Ride 5th Wheel Pin Box - Lippert 1116 - 21,000 lbs

Trailair Air Ride 5th Wheel Pin Box - Lippert 1116 - 21,000 lbs

Item # LC155943
Our Price: $1,384.99
You Save: $111.79
Fifth Wheel King Pin
Shipping Weight: 155 lbs
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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 1116 pin boxes. 1-800-940-8924 to order Lippert fifth wheel king pin part number LC155943 or order online at Free expert support on all Lippert products. Great prices and Fastest Shipping for Trailair Air Ride 5th Wheel Pin Box - Lippert 1116 - 21,000 lbs. Fifth Wheel King Pin reviews from real customers.
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Lippert Fifth Wheel King Pin - LC155943

  • Lippert 1116
  • 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 1116 pin boxes.


  • 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


  • Designed to replace Lippert 1116 5th-wheel pin box
  • Weight capacity: 21,000 lbs
  • 1-Year limited warranty


  • Do not use the Trailair air ride 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 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 Trailair 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 Trailair 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 Trailair 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 Trailair'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 1116 pin box from your trailer. The Trailair uses the same bolts that held on your original pin box so no additional hardware is required for installation. Plus, the Trailair pin box comes out of the box ready to be put on your trailer, so no assembly is needed. Because the Trailair is quite heavy, you should put it on an elevated surface or have a friend help you support its weight during installation.

Lippert Trailair 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.

155943 Lippert Components (LCI) Air Ride by Trail Air Fifth Wheel Kingpin Box for M19 Lippert 1116

Replaces UF35-946207 Ultra-Fab Air Ride Trail Air Kingpin Box

Customer Satisfaction Score:

Customer Reviews

Trailair Air Ride 5th Wheel Pin Box - Lippert 1116 - 21,000 lbs - LC155943

Average Customer Rating:  4.7 out of 5 stars   (141 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 1116 pin boxes.


Freight co delivery estimated for Friday, arrived today. (Tuesday). Borrowed a tractor, dropped the old and lifted this monster into place. 12- 15/16 bolts (originally) 18 hole mount. Not sure if the height is correct for the bed, but will adjust it down if after the rubber bumper is inflated, if it doesn’t sit level. The bolt pattern was correct. better get help! From dropping the MFG lippert, to getting the thing lifted an bolts snugged up, about 45min. Will take a bit longer to attach the deadman switch and electrical box. Well crafted, definitely heavy. This should save my truck n RV from porpoising damage as I’m going over Bridges and bad roads.


Have put around 10K miles on the hitch so far and it has performed well. An extra step in the pre-departure checklist to check the airbag pressure/ride height, but it is worth it as it greatly reduces the jarring from pot holes and abrupt changes in road surface. Installation was easy; perfect fit.

by: 05/08/2023

We're so anxious to try out our new Curt TrailAir.
Installation went smoothly, it looks great.
We can hardly wait to experience the ride!


Exact fit replacement for cheap Keystone OEM part. Fit was so exact, I installed it by myself. Arrived earlier than expected. I hope this will reduce the chucking and smooth out the pull of a 16K RV trailer. I did have to purchase additional bolt sets from my local Home Depot (OEM was 12 sets, this is 18 sets 5/8-11 x 2in Grade 8 with flat and lock washers all torqued to 180 ft lbs).



Makes a world of difference in towing comfort. Jarring is minimized at stops and smooths out the tow on rough roads.

Etrailer Expert

Mike L.


@Hoss We're glad to hear that your # LC155943 Trail Air replacement pin box has improved your towing experience!!


I purchased this Lippert Air Ride hitch for my 40 foot Genesis Supreme trailer and wish I had bought it 2 years ago and installed it. What a difference is has made both in the trailer when towing as well as the difference in my truck while pulling it down the road. eTrailer had the best price and fast shipping. They as well helped me with verifying the right part number that works with my trailer. I purchase many parts and accessories from eTrailer and will continue to purchase from them in the future.

Joe S.


My hitch is working great! It has made a big difference in how well the trailer rides on my truck. No more harsh bumps when I drive over rough roads or poor bridge approaches. Awesome product!


Good looking product. Mounted it on a Montana 40ft 5th wheel. It arrived 2 weeks ahead of schedule. It was easy to install. I did have to grind the corners of the trailer frame bracket as the jaw hinge wouldn’t allow the bolt holes to line up. Once the corners were ground, everything lined up perfectly. It only took my son and I to pick up the pin box and once the first bolt was in, it was simple and easy to do the rest. There are 3 things to complain about. 1. The position of the air valve sucks. Really hard to get at. 2. The mark on the shock for proper inflation is not marked well. Had to get on hands and knees with a flashlight to actually see it. It was suppose to be bright yellow, it’s black, same as the shock. My 3rd complaint would be the fact that I had to drill 3 holes into the pin box to reattach the brake safety cable and the electrical wire box. The biggest positive thing is, is how much of a difference it has made in the ride quality for not only with the trailer but the truck as well. Soooo much smoother than the original pin box. Would I buy another one? You better believe I would. Wondering why I didn’t buy it sooner. Won’t have another 5th wheel without it.


Have not did a road test yet but it’s installed.
Way heavier than factory. I have talked to many that have this and like it.
Helps reduce chucking back and forth movement. Nothing will be solve all if you are on a rough road you will feel it.
No hitch will eliminate.
Was fairly easy to install you will need help to lift. I used the tailgate on the truck and backed under and used blocking to get in place. I installed pretty much myself. My wife help some with aligning the bolts.


We bought a new fifth wheel right after we bought the pen box and we were going to have it put on our new fifth wheel but the bolt holes didn’t match up. Therefore it was never used and has been sitting on our RV LOT ever since. We couldn’t rate because never used it but only way it would let us submit our comments

Etrailer Expert

Jenny N.


Congrats on the new RV! I suspect what happened is that the new RV does not have a Lippert 1116 5th-wheel pin box. This does mean that the mounting bolt pattern will be different which you discovered. I think that your best bet will be to sell the pin box. If you can tell me the pin box number of the pin box that is on your new RV I can tell you if there is a Trail Air pin box that will work.


This is my second trailair pin box and I just love them it takes all of the bouncing out of the truck in the camper and makes it a smooth ride. Shipping was great and product came packaged as good as possible.


Air Ride Pinbox arrived on time and in excellent condition. It is a perfect fit and was an easy installation.
Thank You,
Jack Herndon



I towed our Keystone Raptor about five thousand miles with the original pin box before I decided to try to smooth out the ride so purchased and installed the Trailair Air Ride 5th wheel pin box. I have since towed it approximately Six thousand miles and We are completely satisfied.


I think the air takes some of the roughness out of the ride. It seems better than my previous pin box. I believe however that the air chambers lose air over time and I have had to add air before some of my trips. I don’t think air chambers need to be replaced but monitored for air pressure.


Havent used it yet, but M19 pin box is well made. As usual, etrailer shipped it quick and it arrived with zero defects. Ill update after first use


Excellent item! Works exactly as promised. The only issue I have, which is a small one, is that I have to pump up the doughnut before every trip because the air will leak out. Not a big deal because I have the compressor out to pump up the tires anyway. This pin box takes 98% of the chucking and side-to-side motion out of our fifth wheel. Makes for a lot less white knuckle driving, eases everyone's nerves, and we arrive at our destination without the near whiplash we used to have. If you are looking for a way to ease the ride, this is an excellent product to accomplish that goal.


The TrailAir pin box is a good upgrade from an entry level unit. You have to learn what the ideal air pressure needs to be for your rig, ie, trial and error.
The TrailAir calms the fifth wheel trailer quit a lot going over bridge entries and over rough roads. It would be nice if they would install a tee on the air inlet port with the air add fitting and an air pressure gauge so that one could see the actual bladder air pressure anytime.


Not the improvement I was expecting. Wish I would have got a gen-Y hitch


Tremendous difference in the way the 5th wheel and pickup rides after installation. Well worth the money. Fast shipping from etrailer.


Great product. Easy installation. With regular hitch, truck jarred really hard at bridge transitions. The air ride hitch took all the jarring out of the truck. Chevy 2500HD Duramax. 40’ fifth wheel.


Can’t believe it can be so easy to back up with this hitch. Never go back to a standard hitch. I m sold forever but the capture plate for each hitch needs to be added to the hitch or at least give the part # for that specific item.


Delivery was quick and product was as advertised. I called customer support (Danielle H) and she was extremely helpful and knowledgeable. Danielle helped me make sure I ordered the proper Trailair king pin based on dimensions of my current 5th wheel.


This 5th wheel pin works great smooth ride nothing moves in the trailer. After traveling 6000 miles last winter


Looks very good but I won't be installing the pin box until April we still have over 3 ft. of snow on the ground, Hope I can get the 5th wheel hooked up by April 9 ....


This was the very best upgrade we have done to our 5er. If you don't have one, get one! The difference and comfort is night and day. It projects the 5er and everything inside, the truck and just makes a world of difference! Can't say enough good things about it. 2007 Montana 3000RK.


Good description and fast delivery Than ks


Had problems with air leaking. Found the valve stem was not tight.
Don't feel that it helped the ride characteristics very much.


This kingpin changes the feel of chucking and sudden impact loading (bridge abutments at 70 MPH). The energy is translated differently than a rigid pin…. It does not eliminate chucking or impact load, but it has eliminated the sense that my stiff sprung dually is going to bounce my trailer to death. Would not be without it!

Show More Reviews

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

  • Air Ride Pin Box Replacement for OEM Pin Box on a 2010 Keystone Raptor
    My contact at Lippert said that the 207939 pin box number on your 2010 Keystone Raptor is 1116. This means that the Trailair Air Ride 5th Wheel Pin Box Replacement for you is the part # LC155943 that you referenced.
    view full answer...
  • Recommended Trailair Pin Box For 2016 Montana Fifth Wheel With Lippert 1116 Pin Box
    We do have a replacement pin box for your trailer with the Lippert 1116 pin box, but it is not the Flex Air. The pin box I recommend as a replacement is the Trailair Air Ride 5th Wheel Pin Box, part # LC155943. This pin box has many of the same features as the Flex Air which includes the internal air bag and built-in strut to really reduce chucking and jarring.
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  • Determining The Pin Box Bolt Pattern On A 2013 Keystone Raptor Toy Hauler
    Dimensions on most pin boxes are not the same, with the most important differential being the bolt pattern. Your pin box should have sticker on it either on the side or front that will have some serial numbers on it that we can use to identify the pin box. If yours doesn't have a sticker then you can use the guide I've attached below and take some measurements to determine the bolt pattern. For example, the Trailair Air Ride 5th Wheel Pin Box # LC155943 you were looking at has an 1116...
    view full answer...
  • Adjusting Air Bag Pressure in Trailair Air Ride 5th Wheel Pin Box LC155943
    There is not one specific recommended pressure for the air bag in the Trailair Air Ride 5th Wheel Pin Box # LC155943. The bag's pressure can range from 20 to 120 psi depending on your situation. After some miles you'll likely find the sweet spot for your trailer. Once the pin box is installed, hitch the trailer to the tow vehicle on level ground. There is a sticker on the front of the shock absorber on the pin box. You should inflate the air bag until the bottom lip of the top shroud on...
    view full answer...
    Image 1 for
  • Does Air Bag on Lippert 1116 Trailair Air Ride 5th Wheel Pin Box Need to Be Released Each Trip
    You do not need to remove the air pressure from the Trailair Air Ride 5th Wheel Pin Box - Lippert 1116 # LC155943 anytime you unhook from the pin box but it's always a good idea to check the pressure once you're connected to your tow vehicle again just to make sure it's at the proper level. I will say that if you're planning on being at a campsite for a while (like a week or two) then it would be beneficial to release some of the pressure to increase the life of the air bag. If you're...
    view full answer...
  • Recommended Trailair Air Ride 5th Wheel Pin Box for a 1116 Pin Box
    I would be happy to and thank you so much for the additional information! I just spoke with my rep at Lippert and your 2019 Keystone Montana 3811MS 5th wheel has a 1116 pin box. The Trailair Air Ride 5th Wheel Pin Box item # LC155943 you were looking at is exactly what you need.
    view full answer...
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  • What Is The Pin Box Width Of The Trailair Air Ride 5th Wheel Pin Box?
    The Trailair Air Ride 5th Wheel Pin Box # LC155943 that you mention will work great as a replacement pin box for your existing Road Armor pin box, that has a 1116 bolt pattern. The plate width on # LC155943 measures 12-3/8" wide at the mounting plates and 14-13/16" overall.
    view full answer...
  • When Do I Need To Replace The Air Bag On My Air Ride 5th Wheel Hitch?
    If the bag is starting to crack, then it is time to replace it. We do not want you on the road with a cracked bag as that could damage your equipment or put someone in danger if it goes on the highway. If your bag is leaking, it is also time to change the bag. To know if it's leaking, set the bag up like you normally do and then check pressures periodically as you drive around. The starting pressure should be about 80 to 90 psi, with the pressure increased according to the ride height...
    view full answer...
    Image 1 for
  • How to Tell if Spring is out of Alignment For Trailair Air Ride 5th Wheel Pin Box LC155943
    Thank you very much for your purchase from etrailer of the Trailair Air Ride 5th Wheel Pin Box # LC155943. The pin box has a keyway where the spring bolt sits that you slide in where the air spring rests; it is hard to see the whole thing due to it being black, but I added a photo which shows where it is. You move it by hand, back and forth, with the spring fully deflated. If the air bag was tilted, this is indeed an indication the alignment may not have been fully in the hole.
    view full answer...
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  • Replacement Air Ride Fifth Wheel Trailer Pin Box
    The correct Trailair Air Ride pin box is # LC155943. It has a 21,000 pound capacity and bolts on with no assembly required.
    view full answer...
  • Cushioned Pin Box for 2015 Montana 305 and Is it Compatible with Air Lift Air Bag Kit in Truck
    The air bag suspension enhancement you have installed in your 2016 Ford F-250 does not affect the choice of a cushioned pin box at all. A cushioned pin box like the Trailair you mentioned and air bag vehicle suspension enhancement work really great together actually. The Trailair pin box part # LC155943 that you referenced would be exactly what I would recommend. This will give you a much smoother ride and is also perfectly compatible with your Curt A16 fifth wheel hitch as well! I attached...
    view full answer...
  • What is the Physical Weight of the Trailair Air Ride 5th Wheel Pin Box
    The Lippert Trailair Air Ride 5th Wheel Pin Box, # LC155943, for the Lippert 1116 model pin box has a shipping weight of 155 lbs. With the size and shape of this pin box, I recommend using both sons when installing on your trailer. If you have the availability of a tractor with a loader or fork truck, then either of these two vehicles will help out when installing the pin box. I have attached a video that shows installation of a similar Trailair Air Ride pin box on a trailer for you to review.
    view full answer...
  • Trailair Pin Box Recommendation for 2018 Keystone Montana 3721
    Your 40 foot long 2018 Keystone Montana 3721 would have the Lippert 1116 pin box so for a Trailair to fit it you'd want the # LC155943 which is a Trailair confirmed as a fit and has a 21,000 lb capacity.
    view full answer...
  • Replacement Air Spring and Shock for Trailair Cushioned 5th Wheel Pin Box
    You can check the shock by disconnecting one end and manually applying pressure. If you can easily compress it, then it probably needs to be replaced with # LC177223. A Trailair Air Ride 5th wheel pin box like # LC155943 has both a rubber air spring and a shock absorber to ensure the air bag rebounds after compressing. I suggest you inflate the bag to the level required to raise the shock to the recommend height; this is noted on the shock tube by a yellow sticker with arrows. Unless...
    view full answer...
    Image 1 for
  • What OEM Pin Box Does Lippert Trailair Air Ride 5th Wheel Pin Box # LC155943 Replace
    The Lippert Trailair Air Ride 5th Wheel Pin Box # LC155943 is a direct bolt-on replacement for the Lippert 1116 OEM pin box. The air-cushioned Trailair provides a smoother ride by reducing chucking and jarring and it comes fully assembled. It is rated for 21K. Please note that the Trailair is not to be used with any type of gooseneck adapter.
    view full answer...
  • Replacement King Pin and Upgrade for 2010 Keystone Montana Mountaineer 5th Wheel Trailer
    The Keystone Montana Mountaineer uses the Lippert 1116 pin box so yes, the Trailair Air Ride 5th Wheel Pin Box # LC155943 is a replacement option. This pin box is a vast improvement over the factory pin box and uses a scissor like motion with the air bag and shock to minimize chucking and nearly eliminate jarring. It compresses and rebounds so the shock is not transferred completely to the vehicle and its shock absorption system. I've attached a video of this product to assist. This...
    view full answer...
  • Will the Trailair Air Ride 5th Wheel Pin Box # LC155943 Fit My 2014 Keystone Cougar High Country
    It's possible you will be able to use the Trailair Air Ride 5th Wheel Pin Box # LC155943 on your 2014 Keystone Cougar High Country, but you will have to determine that pin box on your new Keystone is an 1116. Pin boxes are custom-fit, so it's imperative that you are using the correct one. There should be a sticker or plate on the pin box with the manufacturer and model number of the pin box. If you find that and it says it is a Lippert 1116, you will be able to switch them out. If you...
    view full answer...
  • What Capture Plate is Needed to Use Trailair Air Ride Pin Box with SuperGlide 5th Wheel Hitch
    If you do have the 1116 pin box then the Trailair Air Ride pin box that fits your 2018 Montana Country 331RL is the part # LC155943 which has a 21,000 lb weight capacity. You can confirm that your pin box is a 1116 by looking at the stickers or plates on them as the pin box number should be on it. At this time we don't carry PullRite products but I did contact them and found that the capture plate you would need for the Trailair Air Ride to work with your SuperGlide is the part 337758...
    view full answer...
  • Will Trailair Air Ride Pin Box LC155943 Fit 2015 Keystone Fuzion 345 with Lippert 1116 Pin Box
    Thank you for the photo of your Lippert pin box. You have their model 1116. I confirmed this with my contact at Lippert. The Trailair Air Ride 5th Wheel Pin Box # LC155943 that you referenced is a direct bolt-on replacement for the 1116. It comes fully-assembled. After you bolt on the Trailair you can use the arrows on the yellow stick on its front shock as a guide for inflating the internal air bag. With the loaded trailer hitched you'll inflate the air bag until the upper part of the...
    view full answer...
    Image 1 for Image 2 for
  • Compatible Replacement For A Lippert 1116 Pin Box
    The LCI Item Number: 6898531 you provided came back as a Lippert 1116 19k capacity pin box so the Trailair Air Ride 5th Wheel Pin Box - Lippert 1116 - 21,000lbs Item # LC155943 is a compatible replacement for you.
    view full answer...
  • How to Determine the Pin Box Manufacturer and Model on a 5th Wheel Trailer
    There should be a sticker or plate on the pin box itself that lists the manufacturer and model of the pin box. If it is not present then there are some measurements you can take to determine the model of the pin box. I have included a link that explains these measurements for you. Once the pin box is identified we can determine if there is an air ride pin box that will fit.
    view full answer...
  • Does TrailAir Pin Box Air Bag Attach on Top and Bottom of Air Spring
    The lower bolt of the air bag need to attach through the hole that you can see in your picture. So you'd need to pull off that nut and push the stud through that hold and then reattach the nut on the other side.
    view full answer...
    Image 1 for
  • How To Setup An Air Ride Pin Box On a Truck with Air Bags/Shocks
    I don't have any exact air pressure settings for you or anyone for that matter as there are just too many variables involved on each setup but I can walk you through the process below using an air ride pin box on a vehicle with air shocks/bags. Step 1: Deflate Air Shocks/Bags On Vehicle and Pin Box Step 2: Couple Trailer and Tow Vehicle Step 3: Inflate Air Shocks/Bags On Vehicle Till Level (Usually 50-100 Psi) Step 4: Inflate Air Shocks/Bags On Pin Box Till Fill Line Is Reached (Usually...
    view full answer...
  • Do TrailAir Pin Boxes Require Lowering Pressure During Storage
    You wouldn't need to remove any air from a Trailair like the part # LC155943 while storing it. Just be sure to check to make sure the pressure is correct when you go to tow again. The air system of this pin box is very heavy duty and lowering the pressure would not be needed. As with most air bag support devices you want to always have at least the minimum pressure rating in the bag at all times. So no lower than 20 psi. From the picture you submitted you have a Lippert 1116 pin box...
    view full answer...
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Info for this part was:

Employee Mike L
Expert Research:
Mike L
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 Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Kathleen M
Updated by:
Kathleen M
Employee Mike S
Updated by:
Mike S
Employee Chelsea B
Written by:
Chelsea B
Employee Randy B
Test Fit:
Randy B
Employee Zach D
Video by:
Zach D

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