Will Curt Helux Replace Pin Box Alliance Fifth Wheel
Updated 12/10/2025 | Published 12/08/2025
Question:
Hello, Want to know if the Curt Helux Shock-Absorbing 5th Wheel Pin Box - Lippert Rhino is compatible with my Alliance? It has a CURT Rota-Flex pin box that I need to change out because it is an articulating head. Also want to know if it has an articulating head on the pin box? Because I want to purchase the Curt Crosswing 20K Single-Point 5th Wheel Hitch and it states on their website that it cant be an articulating head. Thanks Bobbie Sirin
asked by: Bobbie S
Expert Reply:
Hey Bobbie, while I don't know which specific Alliance fifth wheel you have our understanding is that the Rhino Box style pin box is very common with them which would mean the Curt Helux part # C85MJ would be the correct replacement for a cushioned and fixed replacement. Can you verify for me that you have the Rhino box? Or at least get me the model of your fifth wheel?
Product Page this Question was Asked From
Curt Helux Shock-Absorbing 5th Wheel Pin Box - Lippert Rhino - 18K GTW - 2,950 lbs TW
- 5th Wheel Pin Box
- Upgraded Pin Box
- Absorbs Road Shock and Reduces Chucking
- 18000 lbs
- Rubber Spring Suspension
- Fixed Turret
- Lippert Rhino
- CURT
more information >
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on 5th Wheel Pin Box
Bobbie S.
12/10/2025
Hi Jameson, It is an Alliance Avenue All Access 29RL and it has a Roto Flex on the pin box. Thank you, Bobbie Sirin