Which is Better Cushioned Pin Box the Curt Flex Air or Curt Air Ride
Published 11/17/2025
Products Featured in This Question
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?
Product Page this Question was Asked From
Curt Air Ride 5th Wheel Pin Box - Lippert 1621 & 1621HD - 21,000 lbs
- 5th Wheel Pin Box
- Upgraded Pin Box
- Absorbs Road Shock and Reduces Chucking
- 21000 lbs
- Air Ride Suspension
- Fixed Turret
- Lippert 1621
- Lippert 1621HD
- Lippert
more information >
Continue Researching
- Search Results: trailair air ride fifth wheel king pin
- Search Results: 5th wheel pin box
- Shop: Curt Air Ride 5th Wheel Pin Box - Lippert 1621 & 1621HD - 21,000 lbs
- Search Results: 175 wheels
- Search Results: air ride 5th wheel hitch
- Q&A: What is Best Air Cushioned Fifth Wheel Pin Box
- Search Results: trailair
- Shop: Curt Flex Air 5th Wheel Pin Box - Lippert 1621 - 18,000 lbs
- Search Results: curt a30
- Shop: B&W Companion OEM 5th Wheel Hitch for Ford Super Duty Prep Package - Dual Jaw - 25,000 lbs
- Shop: Suspension Enhancement
- Search Results: trailair pin box
- Q&A: Comparison Between Trailair Flex Air and Gen-Y Executive Replacement Pin Boxes
- Shop: B&W Companion Flatbed Gooseneck-to-5th-Wheel Trailer Hitch Adapter - Dual Jaw - 25,000 lbs
- Shop: Replacement Signal Booster for TireMinder A1AS, i10, and Smart TPMS
- Shop: Aluminum Trinity Series Trailer Wheel - 17-1/2" x 6-3/4" - 8 on 6-1/2 - Black Fork
- Q&A: Which Pin Box Is Better At Absorbing Chucking The Gen-Y Pin Box Or Curt Flex Air
- Shop: B&W 5th Wheel to Gooseneck Pin Box - Lippert Rhino - 25K GTW - 4.5K TW
- Q&A: What is Height of Fixed B and W Companion Hitch for Flat Bed Truck
- Q&A: Recommended Replacement Pin Box for Lippert 182209 1621 on 2010 KZ Durango LX
- Video: Feature Breakdown: B and W Companion Flatbed Gooseneck-to-5th-Wheel Trailer Hitch Adapter
- Video: Review of the Curt A30 5th Wheel Trailer Hitch for Chevy/GMC Towing Prep Package
- Video: B and W Companion Flatbed Gooseneck-to-5th-Wheel Trailer Hitch Adapter Review
- Q&A: Dimensions Of B&W Gooseneck Turnover Ball
- Q&A: What is the Tallest 5th Wheel Hitch for the Ford Factory Puck System?
- Video: B & W Companion OEM 5th Wheel Hitch Installation Guide - 2021 Ford F-350 Super Duty
Todd
11/17/2025
Yes, it seems to be an oscillation, the trailer seems like is rocks on the axles