Flex Air or Air Ride Pin Box with Companion 5th Wheel Hitch

Updated 08/11/2017 | Published 08/09/2017

Products Featured in This Question

Curt Flex Air 5th Wheel Pin Box - Lippert 1621 - 21,000 lbs

(192)

$1727.80

Curt Flex Air 5th Wheel Pin Box - Lippert 1621 - 18,000 lbs

(192)

$1667.90

Question:

Flex Air or Air Ride pin box. I have a Grand Design Solitude 360RL 5th wheel 39 with a Roto Flex king pin. I need 2-3 inches more king pin drop to raise the front of the 5th wheel above the pickup bed rails, so am considering replacing the king pin with either of these 2 models. I have a Companion hitch. Which model would be most beneficial? Since the Companion already has the pivoting head, is the Flex Air necessary? Would it provide too much pivoting? I also tow a 6000 lb boat behind the 5th wheel legal in Montana. Thanks for any input.

asked by: Darren R

Expert Reply:

One thing to ensure is that your Companion hitch is at the tallest height setting. This could provide an easy solution for connecting your king pin.

I spoke to my contact at B&W, who confirmed that your Companion is compatible with both pin boxes. I also spoke with Trailair, who said that the Flex Air would provide you with over 6 inches in additional height. The Flex Air would also be the best option for eliminating chucking and creating a smoother ride.

We offer the Flex Air pin box for model number 1621 pin boxes in both 18,000 lb and 21,000 lb capacities. The lighter capacity can be found here: # LC328492. The heavier capacity can be found here: # LC369535.

I've attached a demo video of the Flex Air for you to check out.

expert reply by: Amber S