Which is Better Cushioned Pin Box the Curt Flex Air or Curt Air Ride

Published 11/17/2025

Products Featured in This Question

Curt Air Ride 5th Wheel Pin Box - Lippert 1621 & 1621HD - 21,000 lbs

(90)

$1459.32

B&W Companion OEM 5th Wheel Hitch for Ford Super Duty Prep Package - Dual Jaw - 25,000 lbs

(5352)

$1399.00

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

(199)

$1678.44

Question:

I have a 2021 Montana 3761FL with 1621 rotaflex on it currently, and towed by a F350 6.7 diesel dually with air lift bags, and a BandW Companion 25k on it. I want to upgrade to a cushioned pin box to reduce the jarring on the rig and truck when traveling. I am not sure which is better the air ride or flex air by Curt, or some other manufacturers box. I want to use a pin box that Lippert approves of so it will not void the frame warranty on the rig. Sincerely, Todd

asked by: Todd

Expert Reply:

Hey Todd, the better option is definitely the Curt Flex Air part # LC328492 over the Airride # LC158778.

The Flex Air has the same vertical air bag cushioning as the Air ride but it also has horizontal cushioning in the pin box mounting plate to provide a smoother ride quality. Sometimes this pin box doesn't work with auto sliding fifth wheel hitches (depends on which one) but for a B and W Companion part # BWRVK3305 like what you have this would work just fine and is for sure the better option. Basically the Flex Air is a combination of the Rotaflex you have now and the Air ride to give best of both worlds

Is there much chucking with your current setup?

expert reply by: Jameson C