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?
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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
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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.