1. Fifth Wheel King Pin
  2. Lippert Components
  3. 1116
  4. Lippert
  5. Reduces Bounce and Jarring
  6. 19000 lbs GTW
Trailair Rota-Flex 5th Wheel Pin Box - Lippert 1116 - 19,000 lbs

Trailair Rota-Flex 5th Wheel Pin Box - Lippert 1116 - 19,000 lbs

Item # LC176440
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Fifth Wheel King Pin
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Lippert Components Fifth Wheel King Pin - LC176440
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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. Call 800-298-8924 to order Lippert Components fifth wheel king pin part number LC176440 or order online at etrailer.com. Free expert support on all Lippert Components products. Guaranteed Lowest Price and Fastest Shipping for Trailair Rota-Flex 5th Wheel Pin Box - Lippert 1116 - 19,000 lbs. Fifth Wheel King Pin reviews from real customers.
  • All Info
  • Reviews (25)
  • Q & A (15)
  • Photos
  • Why etrailer?

Lippert Components Fifth Wheel King Pin - LC176440

  • 1116
  • Lippert
  • Reduces Bounce and Jarring
  • Lippert Components
  • 19000 lbs GTW
  • Pin Box Upgrade
  • Cushioned
  • Fixed Turret

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.


Features:

  • Pivoting pin box replaces standard pin box on your 5th-wheel trailer to improve handling and limit strain on the truck and trailer
    • Minimizes chucking by allowing controlled movement of king pin within your hitch
  • Rubber compound built into the head absorbs road shock
    • Reduces wear and tear on trailer
  • 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


Specs:

  • Designed to replace Lippert 1116 5th-wheel pin box
  • Weight capacity: 19,000 lbs
  • 1-Year limited warranty


Note: Do not use the Trailair Rota-Flex pin box with any type of gooseneck adapter.


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.


Pivoting Head Reduces Chucking

The Lippert Rota-Flex pin box has a pivoting head to help reduce chucking

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.


Rubber Compound Absorbs Road Shock

The Lippert Rota-Flex pin box has a built-in rubber compound to help absorb road shock

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.



176440 Lippert Components (LCI) Rotaflex by Trail Air Fifth Wheel Kingpin Box for Lippert 1116






Customer Reviews

Trailair Rota-Flex 5th Wheel Pin Box - Lippert 1116 - 19,000 lbs - LC176440

Average Customer Rating:  4.8 out of 5 stars   (25 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.

- LC176440
by:

Great product, Installed and what difference the ride. Thanks SJ McDonnell 818618



- LC176440
by:

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. 603833



- LC176440
by:

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 525560



- LC176440
by:

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. 435592



- LC176440
by:

Works great eliminated the jaring. Also shorter so I can make a hard turn without touching the sides of my box 416803



- LC328330
by:

Review 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. 636450



- LC328330
by:

Review 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. 86296


Comments
This king pin box came on my 5th wheel, it does not help the jerking at all. I am now looking to install a different pin box.
-- comment by: Gene - 10/19/2013

2207

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 - 10/23/2013


- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


It got lost by UPS, but the service and customer service was great, received my product in excellent shape. This is a very good company to do business with. I will do business with them again. Thank you Paul. 829079



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


Came in mail packaged! Even the UPS man told me how etrailer is a legit company doing a great job shipping! Any in costumer service was great and her team had the price match over amazon done in one business day. Great to work with!! 770686



- LC328329
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


Helps take the bumps out of our wonderful roads. 681550



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


Good Product will recommend to others 660090



- LC328329
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


I received the pin box in good condition. Preparing to install. Much anticipation to get rid of present air ride hitch which is woefully inadequate. 576710



- LC328329
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


Switched from a ball. Glad I did. Very well pleased. 565223



- LC328330
by:

Review 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 564168



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


Nice product. Would have been nice if ups didn’t loose the first one but you guys got me another one quickly 557530



- LC328330
by:

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. 500967



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


Shipment was on time as promised. The packing in the box was not well done and it had some scratches. Will be trying it out in a few weeks to see how it works. 496382



- LC328330
by:

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. 432321



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


The Roto Pin Box has eliminated 90% of my chucking. The only time I get any now is on a extreme bump but it settles down pretty quick. It was also very easy to install. Some of the bolts are a little tight to get to but doable. 421068



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


I purchased it as a direct replacement for the damaged on on my fifth wheel. 355887



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


I haven't opened the box yet, but it was shipped as fast or faster than I ever thought possible. As far as the product goes i am sure it arrived safe and sound. Good job! 289397



- LC328330
by:

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. 272725



- LC328330
by:

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! 250771



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


arrived ahead of time in great shape. Have not put on yet. 247054



- LC328329
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


Drove well 234094


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Ask the Experts about this Lippert Components Fifth Wheel King Pin

  • Which Trailair Rota-Flex Pin Box Compatible with Lippert 1621 Pin Box
    I have a solution for you, but the Trailair Rota-Flex # LC176440 pin box is designed to replace 5th wheel trailers with a Lippert 1116 pin box and not the 1621 pin box. Instead, you'll want to use either the # LC328330 (trailer with GVWR of less than 18000-lbs) or the # LC328329 (trailer of GVWR less than 21000-lbs). The Trailair Rotaflex is a great solution to help reduce the bouncing and jarring that car be experienced with an uncushioned pin box and will be a great upgrade for your towing...
    view full answer...
  • Best Cushioned Pin Box for 2019 Keystone Sprinter Limited with Lippert 1116 Pin Box
    For your 2019 Keystone Sprinter Limited Fifth Wheel trailer that has a Lippert 1116 pin box installed on it currently the best cushioned upgrade option we have is the Trailair part # LC155943 which uses an air bag and shock to cushion bouncing and jarring. This option will do the best to cushion the ride quality and also has more capacity than you'd need as it's rated for 21,000 lbs trailer weight.
    view full answer...
  • Pin Box Solution for Trailer With Lippert 1116 To Gain Additional Turning Clearance
    If you need additional pin box length for turning clearance with your trailer that has a Lippert 1116 pin box we have a great solution, but the Rota-Flex you mentioned does not provide additional turning clearance so it would not be the way to go. Instead what you'd want is a Sidewinder pin box # RP61410 which moves the pivot point back 22 inches so that even with super short truck beds you'll have the clearance needed to make tight turns.
    view full answer...
  • Is RotaFlex Pin Box Similar to Mor Ryde Pin Box In terms of Cushioning
    The Mor/Ryde pin boxes and the Trailair RotaFlex like part # LC176440 are pretty similar in how they cushion the ride. The Mor/Ryde is definitely more common out there on the road, but the feedback I've read on people who have tried both said they were very similar.
    view full answer...
  • Recommended Pin Box to Replace Lippert 1116 for Added Cab Clearance
    The Trailair Rota-Flex 5th Wheel Pin Box # LC176440 that you referenced will work well to provide a more comfortable ride but it won't help with the cab clearance issue you're having with your short bed truck. The dimensions on the pin box will be fairly similar to your existing Lippert 1116 pin box, which is what this is designed to replace. If you have a Lippert 1116 model pin box the best solution for adding both the needed turning clearance and a more comfortable ride is with the...
    view full answer...
  • Is Replacing 5th Wheel Pin Box Needed to Lower Nose of Trailer
    Replacement pin boxes aren't the ideal solution for lowering the nose of a fifth wheel trailer. Most are all made to provide the exact same height. You might be able to remove your current one though and bolt it back in place using higher mounting holes which would give you a lowered trailer nose. Ideally you have at least 6 inches of clearance from the trucks bed rails and the overhang of the trailer. Other options for leveling the trailer would include raising the trailer suspension...
    view full answer...
  • Slider Companion Hitch Recommendation for Short Bed Truck with Turnover to Allow Turning Clearance
    The Rota-Flex part # LC176440 would fit as a replacement on your trailer that has a Lippert 1116 on it currently. But this product has the same dimensions as your current pin box. These are designed to be basically exact replacements that are cushioned. Extending a pin box out further than what the trailer had can put added stress on the trailer's frame due to the increased leverage. The only solution we can offer is to replace your Companion hitch with the sliding Companion part # BWRVK3400....
    view full answer...
  • Curt Q24 5th Wheel Hitch Compatibility with Trailair Rota-Flex Pin Box
    The Trailair Rota-Flex 5th Wheel Pin Box - Lippert 1116 - 19,000 lbs # LC176440 will work just fine with the Curt Q24 hitch # C16245 as will your older 5th Airborne pin box. You will be limited by the pin box capacity and not the hitch when using this combination. This hitch is compatible with air ride or flex pin boxes but not rotating pin boxes with the turret for additional turning clearance like a Sidewinder.
    view full answer...
  • Replacement Sidewinder Pin Box for Lippert/Trailair Rota-Flex 1116 Pin Box
    I reached out to my contact at Lippert who said that the current Rota-Flex you have on your 5th wheel trailer is the part # LC176440 which is rated for 19K and pin box number 1116. The correct Sidewinder replacement is part # RP61410 on our site which is rated for 16K. This comes with a universal wedge to lock out the king pin but if you can tell me what 5th wheel hitch you have I can let you know if there are any custom wedges that would offer a better fit. Please also note the attached...
    view full answer...
  • Replacing Lippert Rota-Flex with Reese Goose Box on 2018 Grand Design Solitude
    To replace your existing Rota-Flex 5th wheel pin box with the Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter # RP94720, you'll need to confirm its model number and weight rating. This information is typically displayed on a sticker or plate on the pin box itself. Lippert makes three models of the Rota-Flex, so the weight rating on the label is enough to identify which of these three you have: -Model 1621 Trailair Rota-Flex 5th Wheel Pin Box 18,000 lbs # LC328330 -Model...
    view full answer...
  • Replacement 5th Wheel Pin Boxes for a Lippert 1116 Pin Box
    I have included a picture showing what a TriGlide pin boxed looked like. They have been discontinued though in part because they were reportedly very high maintenance. The model that you asked about, 35-946232, is designed to fit in place of a Lippert 1116 pin box. For the Lippert 1116 pin box we have TrailAir pin box # LC155943, Rota-Flex pin box # LC176440, and 5th Airborne pin box # 5AB-S500-700. All are rated for 21,000 pounds except for the Rota-Flex which is rated for 19,000 pounds....
    view full answer...
  • Demco Capture Plate Compatibility with Trailair Rota-Flex Pin Box
    Yes, Demco Capture Plate # DM6171 fits their Hijacker 18K Autoslide 5th Wheel Trailer Hitch head assembly # DM6077 when it is used with a trailer that has a Trailair Rota-Flex pin box like # LC328330 (18K), # LC176440 (19K) and # LC328329 (21K).
    view full answer...
  • Recommended 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter To Improve Ride
    We do offer Air Ride Goose Box pin boxes that will work with a gooseneck hitch in your truck. The included air bag and dual shocks help provide cushion and reduce road shock, while improving the overall ride. If you have a Lippert 1621, 0719, or 1621HD, or Fabex PB-600 series pin box on your trailer you can use part # RP94716 with a 16,000-lb capacity. For a 20,000-lb capacity pin Air Ride pin box you can use part # RP94720 if you have a 1621 or 1621HD Lippert pin box on your...
    view full answer...
  • Is Trailair Rota-Flex Pin Box Available in 12-3/8 Inches Wide?
    The Trailair Rota-Flex 5th Wheel Pin Box - Lippert 1621 -18,000 lbs # LC328330 and the 21,000 lbs # LC328329 are 12-1/2 inches wide. The sizes of pin boxes for width are simply 12 inches or 12-1/2 inches so you would definitely want the 12-1/2 inch pin box. You will want to check your current pin box number which should be on a sticker on the actual box itself. If not there, you will want to measure your mounting bolts to ensure the correct fit. I've attached an article to assist...
    view full answer...
  • Trailair Rota Flex Cushioned Pin Box that Fits as Replacement for Fabex 665
    The cushioned Trailair Rota-Flex 5th Wheel Pin Box # LC328330 does fit the Fabex 665 that you have now and would work great as a cushioned replacement. While this pin box states it's designed to fit as a replacement for the Lippert 1621 we've found that in general the 1621 and the Fabex 665 are identical.
    view full answer...

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Info for this part was:

Edited by:
Lindsey S
Expert Research:
Jameson C
Video Edited:
Jacob T
Written by:
Chelsea B
Installed by:
Randy B
Video by:
Jonathan Y

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