What are Available Capacities for Lippert Rota Flex Pin Boxes to Replace 1621 Pin Box
Updated 03/15/2018 | Published 03/13/2018
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Question:
Whats the difference the 18k vs and 21k? Is the 21k heavier or built stronger? They look exactly the same so Im not sure where the extra strength comes from. I have the 18k version and since Im pulling a trailer behind the 5th wheel, Ill be at about 18400 and may need the 21k version. What do you think?
asked by: Clarendon T
Expert Reply:
For Trailair Rota-Flex pin boxes that fit as a replacement for a Lippert 1621 we have the 21k part # LC328329 and we have the # LC328330 which it sounds like you have. I can assure they aren't both really rated for 21k and the only difference is a part number and a few stickers. While the differences are hard to see by just looking at pictures of the two the 21k version is reinforced in areas you can't see and does have a higher capacity.
If you are going to be over the 18k capacity of your current pin box, even by 400 lbs we have to recommend you upgrade.
Product Page this Question was Asked From
Curt Rota-Flex 5th Wheel Pin Box - Lippert 1621 - 21,000 lbs
- 5th Wheel Pin Box
- Upgraded Pin Box
- Absorbs Road Shock and Reduces Chucking
- 21000 lbs
- Rubber Spring Suspension
- Fixed Turret
- Lippert 1621
- CURT
more information >
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