Is this right For you? Product Expert Kathleen M says:
This Rota-Flex pin box has a pivoting head with a built-in rubber compound that works to reduce chucking and absorb road shock, resulting in a smoother ride and less wear and tear on your trailer. Replaces Lippert 1116 pin boxes.
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The Rota-Flex pin box has a pivoting head and built-in rubber compound that help to reduce checking and absorb road shock for a smoother ride as you tow your fifth-wheel trailer.
The pivoting head on the Rota-Flex 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 Rota-Flex 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.
A heavy-duty rubber compound is built into the head assembly of the Rota-Flex pin box. This rubber absorbs the bumps and vibrations, or road shock, 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 Rota-Flex takes the beating so there's less wear and tear on your trailer or RV and you get a smoother ride.
Easy, Bolt-On Installation
The Rota-Flex is easy to install. Simply remove your existing Lippert 1116 pin box and install the Rota-Flex on your trailer or RV. The Rota-Flex uses the same bolts that held on your original pin box so no additional hardware is required. Plus, it comes out of the box ready to be put on your trailer, so no assembly is needed. Because the Rota-Flex is quite heavy, you should put it on an elevated surface or have a friend help you support its weight during installation.
Average Customer Rating: 4.6 out of 5 stars (21 Customer Reviews)
This Rota-Flex pin box has a pivoting head with a built-in rubber compound that works to reduce chucking and absorb road shock, resulting in a smoother ride and less wear and tear on your trailer. Replaces Lippert 1116 pin boxes.It's a great pinbox. Really helped with chucking and compatible with my Demco sliding hitch. Also no issues with delivery, was helped by Pam and Jessie. They are awesome people to work with.
Perfect replacement for my unit. The movement in the mount helps with the shock on the hitch itself. The unit is very strong and after a year I have had no problems. The instructions were spot on and shipping was very fast. I recommend this pin box as it is more economical than others I have seen but really helps on the bump and pull with a solid hitch
It did what it was advertised to do.
The pin box made the 5th wheel handle better, with less chucking and very stable.
Got it on and ready to try. It fit nicely. Did it myself in about an hour . Nothing left of the box it was in but other than a couple of scratches the pin box itself was in good condition
Definitely dampened the chucking and my wife is much happier with the ride. Also it seems to be much quieter. Noticed at the camper show many units come with the Roto flex from the factory.
The hitch arrived poorly packaged in a cardboard box. The hitch is very heavy. It was scratched and required repainting.
The hitch itself looks well made and strong.
I installed this by myself (it is heavy!) by putting it in the bed of my pickup & strapping it to a floor jack but not a job I’d recommend doing it by yourself.
I already have airbags on the rear axle of my pickup is why I chose this king pin . Only a 200 mile trip and the bucking on the 5th wheel was gone. But the real test will be on a rough highway...
Have not installed yet, paint has been scraped off in several locations especially on top and on the rounded corners from shipping. Will have to do some touch up painting. Excited to get installed and pull trailer next weekend
Great product, Installed and what difference the ride. Thanks SJ McDonnell
Sean M - 06/21/2021Works great eliminated the jaring. Also shorter so I can make a hard turn without touching the sides of my box
Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin
The shipping container was not adequate for pin box. It was too large and no protective packing was used to protect the powder coated finish. When it was delivered by UPS the carton was destroyed. I had to repaint it as it was badly chipped from rough handling. I am disappointed in the performance as I do not see any difference in the chucking which is the reason why I purchased it. If I were to get a different 5th wheel I will not purchase a Rota-Flex again.
Katrina B - 04/04/2022Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin
Received on Wed. as planned. With a little help from my forklift, I had this trail air pin box installed in few hours. Fit perfect on my Sabre. Drove around the block, about 4 miles. This pulls so nice, it is like nothing behind you. Thanks etrailer.
Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin
Worked fine, easy to install only used for one trip to Michigan and sold trailer.
Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin
The product was great, The better part was how fast it got to me . I had it put on the camper the same day i had received it what was 3 days after my order. Now you can't beat the shipping. All my orders from ETrailer has been fast and on time . Thank you all at Etrailer.
Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin
Chelsea was very helpful and the product is very good. The Roto flex was very easy to install Great product.
Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin
Looks great on my 5th. If anyone else has wondered as I did and could not find anything online regarding the vertical height difference between this trail air rota flex and my standard lippert 1621. This pin box will reduce the nose of my 5th by 2" mounted in the same location. Now to pull my rear axle spacers on my dodge to get another 1.5" lower. Etrailer is great as always. Never had a problem with them and have ordered here many times. Thanks Etrailer!
Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin
This king pin assembly works well to get the chucking down. I do feel at times do to road conditions that I still feel some, but over all it has helped the ride and I feel it has take some abuse away from my truck and the trailer seems to ride better. Overall I am pleased with the kingpin assembly for the cost. The only thing I cannot do is put my cover on that was on my old kingpin.
Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin
The Trailair Rota-Flex pin box worked great. The pin box did the job by removing 80% of the chucking as we traveled.
Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin
Great quality, great customer service - I’ll use E-trailer for everything I can now!
Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin
Great product, unfortunately I was very displeased with how it was delivered. The product was unwrapped and had the potential to be scratched up and chipped.
Sierra K - 12/27/2021Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin
Fast Shipping,Great product,It sure softens up the ride! Doesn't eliminate all the jerking but overall quite satisfied! Quality built product. Definitely not a one person job so seek out a helper to hold things Thanks Etrailer.
Thanks for the feedback. If you need help finding a different pin box, please let me know. We carry Ultra-Fab, Fifth Gear and Reese pin boxes in various versions.
-- Patrick B - 10/23/2013Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin
Had trouble receiving the hitch through UPS (they lost it --[48 miles from my residence] conversation with Stacy at etrailer and they shipped another, which my wife and I installed. etrailer was very helpful in sending another to replace the one UPS lost. Thanks so much
Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin
Excellent service. Fast delivery and great price.
Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin
I received my order promptly, faster than expected for a large item. I paid for my pin box, checked the next day and etrailer had dropped the price, they refunded the difference which impressed me greatly. I am a repeat customer and have not had a bad experience ever.
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