Will Trailair Flex Air Pin Box Allow for Same Trailer Height as Forest River OEM Pin Box

Question:

We have a 2017 Forestriver 3825FL 5th wheel and am tired of the jaring and bucking from rough roads plus its damaging to everything over the pin box when hitting big bumps on the road. Ive been looking at the LC328492 Pin box. My question is if I replace my old pin box with the one Ive been looking at will it make the 5th wheel higher on the hitch? If so how much? I already have my existing pin box adjusted as high as I can in keeping it level. Thanks

asked by: William W

Expert Reply:

The Trailair Flex Air 5th Wheel Pin Box # LC328492 is a direct replacement for a Lippert 1621 pin box and Lippert has told us that if you match the bolt pattern from your current 1621 the king pin height on the Flex Air will be the same so it will not make your 5th wheel higher on the hitch.

The Flex Air is a great choice that is going to dramatically improve your towing experience; you will immediately have a more pleasant ride when pulling your Forest River 3825FL due to its air bag that provides cushioning to protect against the jarring and bucking you asked about.

This replacement pin box for the Lippert 1621 has an 18,000 lb capacity; there is also a Trailair Flex Air replacement for a Lippert 1621 pin box with a 21,000 lb capacity at part # LC369535. I have added a photo a customer sent in of the Flex Air on their 5th wheel as well as a link to a video review of this pin box for you to check out.

expert reply by: Kyle S