Enjoy smooth, stable towing with your fifth-wheel trailer by replacing your ordinary pin box with this air-ride-equipped model. An internal air bag and built-in strut absorb road shock so that you won't feel it. Replaces Lippert 1621 pin boxes.
Features:
Specs:
Note: Do not use the Trailair air ride pin box with any type of gooseneck adapter.
Getting there is half the fun, right? Not if you're being bumped, jerked, jammed, and pushed around from the chucking and road shock that occurs as you tow your fifth-wheel trailer or RV. And imagine the costly wear and tear on your trailer as it endures that rocky ride.
Put the fun back into your trip and ease the stress on your trailer by replacing your factory pin box with the 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.
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 1621 or 1621HD 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.
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.
Average Customer Rating: 4.8 out of 5 stars (74 Customer Reviews)
Enjoy smooth, stable towing with your fifth-wheel trailer by replacing your ordinary pin box with this air-ride-equipped model. An internal air bag and built-in strut absorb road shock so that you won't feel it. Replaces Lippert 1621 pin boxes.
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.
The trailair pin box I ordered and received looks be be everything I was told it would be. I have not bin able to road test the hitch yet as it's only early March and living in north east Minnesota, we still have about two feet of snow . I'm sure hoping it works as well as its supposed to.
Dean s - 03/07/2021The 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.
We ordered our Trailair Pin Box and it shipped and arrived earlier than expected. Great customer service and Excellent help with setup after installation.
I love this AirRide by Trail-air. It provides an incredibly smooth ride on the road. You can adjust the amount of air for your ride, the Schrader valve is right on top of the unit and easy to access. My Trail air installed easily on my Forest River Sandpiper 372LOK mid bunk, especially with help from my Dad. This Trailair solved a big problem for me. I needed an extra couple of inches space between my 2018 Ford Super Duty DRW and the coach. My truck came with the Ford factory-installed Reese 27K hitch and I needed more clearance to allow the tailgate to drop without touching the coach. The kingpin on the Trailair sits at least 2” forward of the factory kingpin and provided that desperately needed space. It really makes for smooth and quiet ride ! etrailer folks were very helpful. The first unit was damaged by the freight company and when I notified them, etrailer sent another unit quickly. I will buy from etrailer whenever I can..
Bernie C - 05/26/2020Had a great experience with etrailer ordered my air ride pin hitch and got a great part at a great price. Thanks everyone at etrailer I appreciate you all. Bryan
This is the 2nd air ride hitch i've purchased. First one was on another 5th wheel and stupidly didn't keep it when I traded for the one I have now. They work great! It takes the shock out of the bumpy roads and keeps camper insides from re-arranging when traveling. Very happy with the hitch.
Before installing the airride , dish's shifted and draws opened. Now with easy installation and running 10 thousand miles none of the old problems appeared. Warning, always before leaving check air shock to be at the top of the arrow on shock. Great product!
Took all the transfer of trailer hunting out of tow vehicle as you travel. Also give me more turning clearance on short bed F250.
Very nice pin box. Did not realize it was much wider than the original 1621 pin box I had. With the slider hitch I had to rebuild the plate which adapts the hitch to the trailer.
Very good quality and can not wait to use the Fifth wheel this coming spring.
Helps a lot with chuckling. Would recommend especially if you use your RV and go on long trips. Saves the driver from road exhaustion.
This is the second Trailair hitch I have purchased. Fast shipping and easy to install on our new DRV Fullhouse JX390. Much better than the Mor-Ryde hitch DRV uses. Now no bounce in the truck on rough roads.
Have towed over 5000 miles with the air ride hitch. No problems
Have the Lippert Components Trailair fifth wheel king pin installed on our 40 foot Big Country has made the difference in pulling the trailer down the road. I would recommend the King Pin if pulling a fifth wheel trailer. Now we don't even know it behind us. Great Product.
It arrived in a timely matter, was able to replace the bad one, with no modifications or problems. Has worked great with about 10k miles on it already.
ROBERT S - 03/14/2020Got air ride pin box for 5th wheel. Customer service was excellent. Thanks for you help
Unbelievable difference from the standard king pin hitch! Made I-40 and I-70 a pleasure instead of a workout. Will definitely purchase again on the next trailer.
I will not own another 5th wheel without this type of pin box. It absorbs the shock and improves the ride tremendously. It was recommended to me by a friend and I would do the same. Well built and worth every penny.
Every thing went Like you said it would .It was in very good shape with no damage .Going to put it on my RV and see how it works. Thank you
Very satisfied with the TrailAir. I love it so much that I went ahead and put air bags on my truck to also help. I'm looking forward to Easter for our first camping trip of 2018. Thanks for checking in.
We found our new Trailair to be an excellent improvement . The one thing that could use a little attention is the air pillow system. Every time I use the fifth wheel, I have to add air.
I am pleased with the Trailair kingpin hitch. Just waiting for warmer weather to go camping.
Great product to tame the 5er bucking down the highway on those concrete seams. Ride is much smoother and I'm sure it is reducing the wear going down the highway on both the trailer and the truck.
Do you have a question about this Fifth Wheel King Pin?
Info for this part was:
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.
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.