Is the Curt Helux Pin Boxes Compatible with My Curt Q-Series 5th Wheel Hitch?
Updated 11/13/2025 | Published 10/23/2025
Question:
Are these Helux pin boxes compatible with the Curt Q-series hitches? I know that the Rota-flex pin boxes were not so wanted to make sure. I have the Curt Q20.
asked by: Jeremy
Expert Reply:
Hello Jeremy,
You are correct, the Curt Q-Series like # C85NV is not compatible with rotating pin boxes like the Rota-flex.
You can most definitely use the Curt Helux Shock-Absorbing 5th Wheel Pin Box - Lippert Rhino - 18K GTW - 3,500 lbs TW # C75MJ with your Curt Q-Series 5th wheel hitch. The # C75MJ will be a great fit for you just as long as you have a Lippert Rhino pin box.
What kind of camper are you putting this on? Have you been on any fun trips this year?
(click to enlarge)
Product Page this Question was Asked From
Curt Helux Shock-Absorbing 5th Wheel Pin Box - Lippert Rhino - 18K GTW - 3,500 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
Kate F.
11/13/2025
Hey Jeremy, how did the Helux pin box work out with your Curt Q20 hitch? Your experience could point others toward the right setup for their fifth wheel.