Ultra-Fab Products Fifth Wheel King Pin - UF35-946206
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:
- Weight capacity: 21,000 lbs
- 1-Year warranty
Note: Not for use with any type of gooseneck adapter.
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.
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.
35-946206 UltraFab Trail Air Kingpin Box - M15
Customers compare UF35-946206 to these similar products
Ask the Experts about this Ultra-Fab Products Fifth Wheel King Pin
Do you have a question about this Fifth Wheel King Pin?
- King Pin Center to Front and Back Mounting Hole Measurements for Ultra-Fab King Pin # UF35-946206
- On the Ultra-Fab Trailair Air Ride 5th Wheel King Pin, # UF35-946206, king pin center to the first row of mounting bolt holes measures 9 inches, center king pin to last row of mounting bolt holes measures 16-7/8 inches.
If you look at the diagram I provided, you can see the other relevant measurements for this replacement king pin.
view full answer... 
- Best Fifth Wheel Pin Box Replacement to Reduce Chucking
- Your correct set-up would depend on the length of your truck bed.
If you have a 6-1/2 foot bed and a sliding hitch, the Ultra-Fab Trailair you referenced, part # UF35-946206 would dramatically improve your ride quality. This pin box is a direct replacement for the Lippert 0179. If you had the Lippert 1621 king pin, you would need part # UF35-946203.
If you have the 5-1/2 foot bed, you would need to use a 5th Airborne Air Ride with Sidewinder to provide additional clearance between the fift
view full answer...
- Replacement Pin Box to Reduce Chucking when Towing a Big Horn 5th Wheel Trailer with Chevy Silverado
- An air ride pin box will work well in reducing vertical and horizontal shock when towing your 5th wheel trailer. Since you have a 1621HD pin box you would need to go with the 5th Airborne coupler, # 5AB-E1621-610. This coupler can reduce chucking by as much as 60 percent and vertical shock by as much as 44 percent. I have included a link to the installation instructions and an FAQ on 5th Airborne couplers for you.
view full answer...
