Which Replacement Trailair Pin Box for 2008 Keystone Challenge 35 5th Wheel

Question:

I have a 2008 Keystone Challenge 35. Which air pin box would you suggest? Thanks

asked by: Pat D

Helpful Expert Reply:

In order to recommend the correct Trailair replacement pin box for your Keystone Challenge 5th wheel, I will need to know the manufacturer and model number of your OE pin box. This information should be listed on a plate or sticker affixed to the pin box. If you would care to reply with this information, I would be happy to make a recommendation.

If you cannot find a model number or manufacturer, you can take some measurements of your OE pin box as shown in the FAQ article I have linked you to. With these measurements, we can most likely determine which pin box you have.

expert reply by: Mike L

Pat D.

4/17/2013

Hi MikeMy trailer has a Lippert 1621 box pin.Thanks Pat

Patrick B.

4/24/2013

With the Lippert 1621 you can use the 5th Airborne with a 21K capacity, part 5AB-E1621-610. The other options are the Trailair Tri-Glide,UF35-946229, the Trailair Air Ride, UF35-946203, and the Rota-Flex, UF35-946202. These options do not have the Sidewinder turret for moving the turn point further back for short beds. Of the 4 options, I do not like the Rota-Flex. I prefer the adjustability of the air systems on the others. Although some prefer this since they do not have to worry about air pressure. If 18K is not enough weight capacity, then you can throw it out the RotaFlex and the Tri-glide. The big difference between the Trailair Air Ride and the Airborne is the location of the suspension parts. Everything is easier to access on the Trailair, but that means that your air fitting, shock and air bag are exposed. Price on those two is pretty comparable, the question is do you prefer easier access or more protection for the suspension.