Which TrailAir Replacement Pin Box for 18K Toy Hauler with Lippert 1621 OEM Pin Box

Question:

I need the L05 Trail Air replacement pinbox for Lippert 1621. But the 21000 are cheaper than the 18000 WHY I have a 18000 GVW toy hauler When fully loaded Which one do I need Thanks

asked by: Carl

Expert Reply:

There are two L05 replacement pin boxes, as you have found. The # LC158778 is the standard air ride pin box that uses an airbag to reduce bouncing and jarring. The TrailAir Flex Air, part # LC328492 has the same air bag, but also adds a cushioned pivoting head to reduce road shock and limit chucking.

If the fully loaded weight of your Toy Hauler does not exceed its 18K capacity, you can use either pin box. If you are right at 18K, I would recommend you go with the standard TrailAir with the 21K capacity, part # LC158778.

expert reply by: Mike L