bing tracking image
  1. Fifth Wheel King Pin
  2. Lippert
  3. Venture CJ20515
  4. Venture CJ20517
  5. Steelco-Davis PB02
  6. Steelco-Davis PB02W
Trailair Air Ride 5th Wheel King Pin - Steelco/Davis, Venture - 21,000 lbs

Trailair Air Ride 5th Wheel King Pin - Steelco/Davis, Venture - 21,000 lbs

Item # UF35-946211
Retail:$1,460.95
Our Price: $1,205.87
You Save: $255.08
Fifth Wheel King Pin
This item qualifies for Free Truck Freight Shipping
Shipping Weight: 184 lbs
Quantity: 
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

Customer Photos

Need help with installation?
Locate installers near me
Product Expert Kathleen M

Is this right for you? Product Expert Kathleen M says:

Yes, if you:

  • Like having the "Cadillac" option - RVers with this pin box say it feels like their fiver is floating over the road
  • Often drive over very rough roads and want to save your truck and trailer (and yourself!) from getting beat up by all the bumps and dips

No, if you:

  • Have little space between the pin box and the nose of your trailer which can make monitoring and maintaining the pressure in the air bag a chore
  • Use a gooseneck adapter to tow your fifth wheel
  • Haul a trailer that weighs over 20,000 lbs
Experience smooth, stable towing with your fifth-wheel trailer by replacing your ordinary pin box with an air-ride-equipped model. The scissoring action of the coupler allows the interior air bag to absorb road shock so that you won't feel it. 1-833-496-1390 to order Lippert fifth wheel king pin part number UF35-946211 or order online at etrailer.com. Free expert support on all Lippert products. Guaranteed Lowest Price and Fastest Shipping for Trailair Air Ride 5th Wheel King Pin - Steelco/Davis, Venture - 21,000 lbs. Fifth Wheel King Pin reviews from real customers.
  • All Info
  • Reviews (118)
  • Q & A (0)
  • Photos
  • Why etrailer?

Lippert Fifth Wheel King Pin - UF35-946211

  • Venture CJ20515
  • Venture CJ20517
  • Steelco-Davis PB02
  • Steelco-Davis PB02W
  • 21000 lbs GTW
  • Absorbs Road Shock and Reduces Chucking
  • Lippert
  • Upgraded Pin Box
  • Fixed Turret

Experience smooth, stable towing with your fifth-wheel trailer by replacing your ordinary pin box with an air-ride-equipped model. The scissoring action of the coupler allows the interior air bag to absorb road shock so that you won't feel it.


Features:

  • Air ride pin box replaces standard pin box on your 5th-wheel trailer to enhance performance
    • Cushions and absorbs road shock
    • Improves handling and overall ride
    • Limits strain on truck and trailer frames
  • Scissor action allows pin box to compress, compensating for jarring and bounce
    • Internal air bag absorbs the road shock
    • Built-in spring ensures that pin box rebounds - keeps air bag from breaking down
  • Direct replacement for OEM pin box
  • King pin connects to any 5th-wheel trailer hitch
  • Sturdy steel construction


Specs:

  • Designed to replace the following pin boxes:
    • Venture CJ20515 and CJ20517
    • Steelco/Davis PB02,PB02W
  • Weight capacity: 21,000 lbs
  • 1-Year warranty


Notes:

  • Not for use with any type of gooseneck adapter
  • Because of the size of this item, it ships via truck freight

Eliminate the bounce from your ride with the Trailair air ride coupler. The unique scissoring action of the pin box ensures that road shock is absorbed, preventing the harsh, rigid ride that you typically encounter while towing your fifth-wheel trailer. Not only does this improve your overall towing experience, but it also helps maintain a sound, well-functioning system. Less bounce and jarring means less stress on your truck, trailer and hitch.


Trailair Air Ride Coupler

How the Trailair Air Ride Works

When you encounter uneven terrain on your trip or hit a pothole on the highway, the Trailair pin box compresses, transferring the road shock to its internal air bag. A built-in air spring ensures that this compression occurs in a controlled fashion so that the air bag doesn't burst. It also causes the pin box to appropriately rebound, positioning it so that it's ready for the next bump in the road.



155925 Lippert Components (LCI) Trail Air Kingpin Box - L03

Replaces 35-946211 UltraFab Trail Air Kingpin Box - L03






Customer Reviews

Trailair Air Ride 5th Wheel King Pin - Steelco/Davis, Venture - 21,000 lbs - UF35-946211

Average Customer Rating:  4.7 out of 5 stars   (118 Customer Reviews)

Experience smooth, stable towing with your fifth-wheel trailer by replacing your ordinary pin box with an air-ride-equipped model. The scissoring action of the coupler allows the interior air bag to absorb road shock so that you won't feel it.

by:

Smooths out the ride greatly, really pleased with so far. I removed the Air chuck and installed a tee with Gauge and air chuck makes it easy to monitor air pressure before traveling, one should note that these do bleed pressure down in few weeks that is pretty much normal for air bags of this type. I have a Dewalt cordless mini compressor and it works great to quickly & quietly pressurize before trip. I usually set my at 65 PSI




by:

I think that this is just what the doctor ordered. I have not installed it yet, but this looks very much like what I need for my trailer!




by:

GREAT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!




by:

Review from a similar Trailair in Fifth Wheel King Pin


I just completed a 2800 mile trip after installing the Trail Air Air Ride pin box on my Solitude 5th wheel. I was able to install it myself from the bed of my pickup using a hydraulic bottle jack to lift it into position.

I previously made the same trip with the factory installed MORryde Cushioned Pin Box and the Trail Air provides a greatly improved ride. With the MORryde, I encountered several sections of concrete highway that set up a front-to-back oscillation which persisted across many miles. I didn't have that issue with the Trail Air.

I didn't order the Flex Air model that also included the flexible block because I was concerned the added height of that pin box would have been a problem. However, after installing the non-flex Trail Air I've found that the other one would have also worked out if I lowered my truck hitch an inch or two.

Also worth noting, this pin box is four inches shorter than the 1621 MORryde it replaced. However with a long bed truck I have no clearance issues and can still lower the tailgate when hitched up.




by:

Review from a similar Trailair in Fifth Wheel King Pin


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:

Review from a similar Trailair in Fifth Wheel King Pin


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:

Review from a similar Trailair in Fifth Wheel King Pin


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.




by:

Review from a similar Trailair in Fifth Wheel King Pin


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.


Comments
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.
David M - 03/04/2022


by:

Review from a similar Trailair in Fifth Wheel King Pin


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


Comments
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.
Jack - 08/27/2022


by:

Review from a similar Trailair in Fifth Wheel King Pin


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.


Comments
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!
Joe S - 06/23/2021


by:

Review from a similar Trailair in Fifth Wheel King Pin


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.




by:

Review from a similar Trailair in Fifth Wheel King Pin


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).




by:

Review from a similar Trailair in Fifth Wheel King Pin


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:

Review from a similar Trailair in Fifth Wheel King Pin


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:

Review from a similar Trailair in Fifth Wheel King Pin


The pin box worked out very well. You still feel the bumps but almost no chucking. My wife likes to sleep in the truck with her head against the head rest, but she could not do that with the old pin box. The only thing that I had to do with the new pin box was drill out the holes because the old pin box had bigger bolts.




by:

Review from a similar Trailair in Fifth Wheel King Pin


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




by:

Review from a similar Trailair in Fifth Wheel King Pin


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:

Review from a similar Trailair in Fifth Wheel King Pin


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


Comments
Makes hook up a snap!
Dale H - 10/05/2021


by:

Review from a similar Trailair in Fifth Wheel King Pin


You shipped the wrong kingpin!!! I had mega problems shipping it back to you, while your company held my payment, until you received the incorrect Kingpin back, all due to your company’s error!! That is why I will no longer do busywigh you!




by:

Review from a similar Trailair in Fifth Wheel King Pin


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.




by:

Review from a similar Trailair in Fifth Wheel King Pin


I noticed a much better ride inside my truck after installing my 5th wheel pin box.




by:

Review from a similar Trailair in Fifth Wheel King Pin


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..


Comments
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.
Bernie C - 05/26/2020


by:

Review from a similar Trailair in Fifth Wheel King Pin


Great products fit perfect




by:

Review from a similar Trailair in Fifth Wheel King Pin


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.




by:

Review from a similar Trailair in Fifth Wheel King Pin


Looks like a very good product, Easy installation only took an hour. Took it on a short test run On a very rough road It seemed to work well but we'll know more on the next upcoming trip. Packaging was inadequate could have used more Tie down straps , but no damage.etrailer is great to work with!!!



25
119
Show More Reviews

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

  • Selecting Replacement Trailair Air Ride 5th Wheel King Pin for 2007 Jayco 5th Wheel
    Selection of a Trailair Air Ride 5th Wheel King Pin to replace your existing pin box is best made by using the original pin box part number. This should appear on its safety sticker. If this is not available the trailer manufacturer should be able to tell you the pin box they installed if you give them the VIN. The linked article includes a cross reference of compatible air ride pin boxes; simply check for your OEM pin box number to see if a suitable air ride unit is offered. If this is...
    view full answer...
  • Air Ride Pin Box Recommendation for a 2005 Holiday Rambler Savoy
    If your 2005 Holiday Rambler has a Lippert 1621 pin box like you mentioned then for an air ride pin box you would want the # LC328492 which is a Flex Air cushioned pin box that would work well for you. On the pin box of your trailer there should be a sticker or plate that has the pin box model info. You will need to verify that you have a 1621 pin box before ordering.
    view full answer...
  • 2012 Jaco Eagle 31.5 RLTS Cushioned Pin Box Replacement
    Based on dimensions we've had sent to Lippert we know that the Trailair part # UF35-946211 can fit in place of your Dexter AF7926 pin box to provide you with a cushioned replacement.
    view full answer...
  • What is the Difference Between Trailair Pin Boxes UF35-946211 and UF35-946219
    The difference between the two Trailair Pin Boxes that you referenced are the pin boxes they are designed to replace on a trailer. The part # UF35-946211 is designed to fit the Venture CJ20515 and CJ20517 and Steelco/Davis PB02,PB02W whereas the part # UF35-946219 is designed to replace the Steelco/Davis PB01 and Venture CJ13515, CJ13517 and Short. Either would be fine with your long bed truck, it would just be a matter of picking out the right one to replace the pin box on your trailer.
    view full answer...
  • Trailair Pin Box Replacement Recommendation for 2008 Rockwood Signature 8287SS
    For your CJ20517 pin box we have the Trailair Pin Box part # UF35-946211 which is a confirmed fit and would work well.
    view full answer...
  • Air Ride Pinbox Compatible With a Steelco/Davis Pin Box PB02 or PB02W?
    There is not a Flex Air pin box fit for your Steelco/Davis PB02 or PB02W pin box. There is similar option available in the Trailair Air Ride 5th Wheel King Pin - Steelco/Davis, Venture - 21,000 lbs # UF35-946211 that is a fit. You won't have the additional pivot with cushioning at that pivot found in the Flex Air, but you will still have the air ride adjustable replacement for your current pin box.
    view full answer...
  • Availability of Replacement 5th Airborne Air-Ride Pin Box for Venture CJ20517 Pin Box
    We do have a confirmed fit for an Ultra-Fab Trailair Air Ride 5th Wheel King Pin to replace your Venture. The part # UF35-946211 is a direct bolt-on replacement rated to 21,000-lbs. Please note that this unit is not compatible with any type of goose neck adapter. However, currently we do not show a direct bolt-on 5th Airborne Air-Ride pin box to replace the Venture CJ20517 unit that is on your 5th wheel. I checked with my technical contact at 5th Airborne and he confirmed that they too...
    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...
    Image 1 for
  • Reese Goose Box Availability to Replace a Venture CJ20517 on an 03 Holiday Rambler Alumascape
    The number you found on the side of your current king pin will mean you have a Venture CJ20517. This does complicate things a bit as this style is not very common and the only option we have that will fit it is the Lippert Trailair Air Ride # UF35-946211. However, this will fit a standard 5th wheel hitch and wont really help with your situation. The only other option we will have will be the Andersen Ranch Hitch Universal 5th-Wheel-to-Gooseneck Coupler Adapter # AM3100 for a truck with...
    view full answer...

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




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • 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 fifth wheel king pin 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

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

Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Kathleen M
Updated by:
Kathleen M
Employee Laura H
Updated by:
Laura H
Employee Chelsea B
Updated by:
Chelsea B
Employee Wilson B
Updated by:
Wilson B
Employee Mike S
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.


Product Experts Available Now!
Call 1-833-496-1390