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  1. 5th Wheel Pin Box
  2. Lippert
  3. Leland 7920
  4. Upgraded Pin Box
  5. Absorbs Road Shock and Reduces Chucking
  6. 21000 lbs GTW
Trailair Air Ride 5th Wheel King Pin - Leland 7920 - 21,000 lbs
Lippert

Trailair Air Ride 5th Wheel King Pin - Leland 7920 - 21,000 lbs

Part Number: UF35-946208
In Stock
$1,513.66
Retail:$1,545.95
You Save: $32.29
5th Wheel Pin Box
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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. 1-800-940-8924 to order Lippert 5th wheel pin box part number UF35-946208 or order online at etrailer.com. Free expert support on all Lippert products. Great prices and Fastest Shipping for Trailair Air Ride 5th Wheel King Pin - Leland 7920 - 21,000 lbs. 5th Wheel Pin Box reviews from real customers.
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  • Reviews (79)
  • Q & A (0)
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Lippert 5th Wheel Pin Box - UF35-946208

  • Leland 7920
  • Upgraded Pin Box
  • Absorbs Road Shock and Reduces Chucking
  • Lippert
  • 21000 lbs GTW
  • 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 box: Leland 7920
  • Weight capacity: 21,000 lbs
  • Overall travel: 3"
  • 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.



155934 Lippert Components (LCI) Trail Air Kingpin Box - L08

Replaces 35-946208 UltraFab Trail Air Kingpin Box - L08






Customer Reviews

Trailair Air Ride 5th Wheel King Pin - Leland 7920 - 21,000 lbs - UF35-946208

Average Customer Rating:  4.7 out of 5 stars   (79 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.

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Works perfect.



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Exactly what I ordered very happy with the product



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So far I have not had any issues.



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Best thing I ever bought for my rv



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The product was great. The service was great. The freight company left a lot to be desired.



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This really helped with the chucking I was experiencing.



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This pin box smoothes out the ride in the truck. No more chucking. No noise at all.



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There was a mix up with the order but once it got straighten out,they reshipped another one.I told them that I needed it by Friday,I don't know how but it made.it I would use this company again in the future.
Thanks



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etrailer is and excellent site to order parts for your trailer. They walked me thru the part numbers so the pin box I ordered fit. No problems with the install and I can't wait to take my first trip with the new pin box.



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Great products fit perfect



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



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The pin box works perfectly.



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Camper rides much better .. good people at etrailer thanks



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love it worked so good, love Etrailer also great company



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Good description and fast delivery Than ks



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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.


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See what our Experts say about this Lippert 5th Wheel Pin Box

  • Can a Leland 7921 5th Wheel Pin Box be Replaced with Gen-Y Hitch or Reese Goose Box
    I do have a solution for towing your trailer with a goose neck hitch but, there is not a direct replacement available that will easily bolt-on in place of your current Leland 7921. Reese does not, as a direct bolt-on, make a Goose Box that fits as a replacement for a Leland 7921 pin box, neither does Gen-Y Hitch. However, in talking with the Rep at Gen-Y, she stated they provide an option for a custom hole pattern and suggests calling Gen-Y directly for their Customer Service to walk...
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  • Fifth Wheel Trailer Pin Box Replacement for Trailer with Leland 221-0023-00
    The 221-0023-00 you referenced corresponds with a Leland 7920 so the cushioned Trailair Air Ride 5th Wheel King Pin - Leland 7920 - 21,000 lbs # UF35-946208 will fit it and work well. If instead you are looking for a pin box replacement that fits your trailer and provides additional turning clearance you'd want the Sidewinder part # ST400-5AS16K.
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  • Pin Box Upgrade Option For A Leland 7920 Pin Box
    I took a look at the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box # 325-GH-8040 that you mentioned and it's actually going to be a fit for the Lippert 1621 and 1621 HD 5th-wheel pin boxes, and not your Leand 7920, however I do have another solution. Instead, take a look at the: -Trailair Air Ride 5th Wheel King Pin # UF35-946208. This pin box is designed to upgrade your Leland 7920, has a weight capacity of 21,000lbs, and features cushions that absorb road shock to improve overall handling...
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  • Is the Leland 7920 Pin Box Height Adjustable
    With a Leland 7920 pin box similar to the Trailair Air Ride 5th Wheel King Pin part # UF35-946208 you will have 1.5" between your mounting holes the one mentioned here has the ability to drop 4.5" if yours is designed the same it will also move 4.5" if you only have eight holes in your pin box then you can expect to gain 3" of height. In either case lowering the pin box is a great way to get additional bed rail clearance and allow you to make off camber turns or navigate the hills a bit...
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  • 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...
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  • Trailair Pin Box Recommendation to Replace Leland 7920 Pin Box
    We have a Trail Air for the Leland 7920 which is part # UF35-946208 but we do not have a Tri-Glide. The Tri-Glide is actually getting phased out since it required a great deal of maintenance.
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  • Trailair Pin Box for Leland 7920 OEM Pin Box
    The Lippert/Trailair pin box that fits the Leland 7920 is # UF35-946208.
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  • Replacement Pin Box for Leland 7921
    The best pin box we have for your trailer is the Trailair Air Ride 5th Wheel King Pin part # UF35-946208 which is a direct replacement for both Leland 7920 and Leland 7921 pin boxes. The Trailair Air Ride 5th Wheel King Pin will reduce bounce more so than any other other pin box on the market due to its integrated airbag and shock absorber. This reduced bounce is going to make for a much better ride as well as reduced stress on the tow vehicle and trailer. The internal airbag and shock...
    view full answer...
  • Determining Replacement Pin Box Compatibility By Measuring The Bolt Pattern
    Since the bolt holes line up vertically and horizontally you'll be able to bolt the Trailair Air Ride 5th Wheel King Pin - Leland 7920 # UF35-946208. This specific pin box actually has an 18" king pin to first set of bolt holes measurement and 25" measurement to the second set of bolt holes so you won't actually be gaining length. If you have a short bed you'll want to use a compatible sliding hitch in order to make 90 degree turns.
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    Image 1 for Image 2 for Image 3 for Image 4 for
  • Replacement Cushioned 5th Wheel Pin Box to Replace a Leland 7921
    The Trailair Air Ride 5th Wheel King Pin - Leland 7920 - 21,000 lbs # UF35-946208, is a direct replacement for your Leland 7921. It has a higher capacity, at 21,000 pounds, but it's what you're looking for.
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  • King Pin Box to Fit Leland AF 7921 Bolt Pattern
    None of the Reese Goose Box models fit the Leland AF-7921 pin box wings/flanges, but there is another solution. There are only two king pins that fit the Leland bolt pattern, those being the Trailair # UF35-946208 5th wheel kingpin and the Reese # ST400-5AS16K 5th wheel king pin with sidewinder turret. The Trailair is a traditional king pin with an air ride shock which offers a smoother ride, but only traditional limited turning clearance. The Reese 5th wheel moves the rotational point...
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  • Replacement Cushioned Pin Box for a Leland 7920
    It sounds like you have a Leland 7920 pin box. This matches all of the specs you gave except the 2b measurement which is the height different between one set of bolt holes to the row that is either one set higher or one set lower. The Leland 7920 has a 1-1/2" 2b measurement. If you were measuring from where your bolts are installed and there is a row in-between them then that would explain the difference. We do carry a variety of upgrades for your pin box but none of them are the OEM version....
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  • Replacing Leland 7920 King Pin With Trailair
    There is an option for you to upgrade from your Leland 79120 king pin with a Trailair, and the correct replacement is the Trailair Air Ride 5th Wheel King Pin - Leland 7920 - 21,000 lbs # UF35-946208.
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  • Correct TrailAir Pin Box Upgrade for 2008 Jayco Recon ZX with Leland 7920 Pin Box
    From what I was able to find, the 2008 Jayco Recon ZX came with a Leland 7920 model pin box. So, if you can confirm this is the part number printed on your pin box label, the correct replacement TrailAir Air Ride 5th Wheel King Pin is part # UF35-946208. I've also attached a diagram with various measurements for the Leland 7920, just in case you aren't able to find or read the pin box model number on the label, you can confirm by measuring your existing pin box. If this isn't what you...
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  • Replacement Pin Box For Fifth Wheel Trailer with Dexter 221-0023-00 Pin Box
    Based on my research, your Dexter 221-0023-00 pin box features the same basic measurements as the Leland 7920 pin box. The only difference between the two is the distance from the front and back bolt holes to the center of the king pin (which is what you referred to with your 25-7/16 inch measurement). This simply means that a replacement king pin designed to replace the Leland 7920 will work on your trailer, but the king pin will extend out a bit more when compared to your existing unit....
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  • Recommended Replacement Air Ride Pin Box for 2008 Jayco Eagle with Extended Pin Box
    Thank you for the measurements! I have a few options for your pin box replacement. The Leland 7920 is the closest to what you have and any pin box compatible as a replacement for it will also be compatible with your Dexter pin box. For the air ride replacement, you can use the Trailair Air Ride 5th Wheel King Pin # UF35-946208 made by Lippert. It is rated for up to 21,000 lbs. Because you have a short bed truck, you may want to consider the 5th Airborne Premium 5th Wheel Air Ride King...
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  • Will a 5th Airborne Extended Air Ride Pin Box Replacement fit a Pull Rite Super Glide
    The Trailair Air Ride 5th Wheel King Pin replaces the pin box on the trailer and is designed to work will all fifth wheels hitches. Check your Pull Right Super Glide owner manual to see if they have any restrictions about this kind of pin box. I checked through the instructions and manual for the 5th Airborne and it did not make any mention of not being compatible with your Super Glide. In order to determine the proper 5th Airborne, you need to find the make and model of the the pin box...
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  • How to Find Trailair Pin Box That Fits 2012 Denali 319RL Fifth Wheel Trailer
    To find the correct Trailair for your 2012 Denali 319RL trailer you would only need to know the part number of your current pin box, which is often found on a sticker or stamped on the pin box itself. Alternatively, if you are unable to find that number for some reason you can call your trailer manufacturer, give them your VIN and they should be able to tell you what the original pin box number was. You can also take a measurement and match it to the chart in the linked help article I've...
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  • Replacement Pin Box Upgrade for a 5th Wheel Trailer with Venture CJ13517 Pin Box
    We have some pin box upgrades that will fit in place of your Venture CJ13517 pin box but # UF35-946208 is most like the FlexAir. It is rated for 21,000 pounds. It has 2 Urethane bumpers help to absorb road shock that do not require maintenance and a parallel linkage system that minimizes chucking. I linked an informational article on these options for you.
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  • Is There A Sidewinder Pin Box That Replaces The Leland AF 7921 Pin Box?
    Hello Brandon, thanks for reaching out. Sadly, there is no sidewinder that will replace the Leland AF 7921 pin box. The only pin boxes we carry that replace it are cushioned pin boxes like the Trailair Air Ride 5th Wheel King Pin # UF35-946208 or the MORryde Cushioned 5th Wheel Pin Box # MR52VR. With there being no sidewinder options, there really is not a good way to pull your 5th wheel with a tuck with Ramboxes. The only thing to do would be to get a different 5th wheel, or to convert...
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  • Replacement Air Ride Pin Box Recommendation for a 2008 Eagle Super Lite 30.5 RLS
    What I suspect you actually have on your trailer is a Leland 7920 pin box. But since I can't confirm you will need to check out the FAQ article I attached on determining what pin box you have based on the dimensions. If it turns out you have a Leland you would want the Air Ride Sidewinder part # ST400-5AS16K since you said you are looking for a replacement pin box for better turning clearance. Sidewinders move the pivot point back 22 inches and allow for great turning flexibility. If...
    view full answer...
  • Recommended Gooseneck Compatibility with Leland AF 7920 Pin Box
    There is not a Reese Goosebox compatible with your Leland AF 7920 pin box. Instead you will need to use an adapter like the Convert-A-Ball Cushioned 5th-Wheel-to-Gooseneck Adapter - 12" to 16" Tall - 20,000 lbs # CAB-C5G which has some shock absorption or the Demco Recon Gooseneck-to-5th Wheel Trailer Hitch Adapter - Single Jaw - 21,000 lbs # DM8550045 which requires no change to your current pin box or can be used in conjunction with the Trailair Air Ride 5th Wheel King Pin - Leland 7920...
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  • Replacement for Leland 7920 Pin Box for More Cushion
    We have one option for a replacement pin box for your Leland 7920 that is going to significantly improve your overall ride, the Trailair Air Ride 5th Wheel King Pin - Leland 7920 - 21,000 lbs # UF35-946208. This is a premium replacement that will allow you the most comfortable towing experience possible because it will greatly minimize the bouncing, chucking, and jarring that occurs with standard pin boxes.
    view full answer...
  • Will 5th Airborne Premium Fifth Wheel Air-Ride Pin Box Fit in Place of a Leland 7910 Pin Box
    We have found that the Leland 7910 pin box has the same mounting measurements as the 7920. That means that you would be able to use 5th Airborne pin box # ST400-5AS16K or the # UF35-946208.
    view full answer...


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