Recommended Curt Helux Pin Box for a Rhino Bolt Pattern
Updated 10/15/2025 | Published 10/13/2025
Products Featured in This Question
Question:
I have a 2022 Vanleigh Beacon 39 FBB Length: 39’8” Hitch Weight: 3,100 CCC: 3,300 Dry Weight: 14,700 GVWR: 18,000. The fifth wheel pin box is the CURT Rota Flex rated for 21,000 lbs. I am told it has the Rhino bolt pattern. 1.I want to replace the hitch with the Helux, preferably the gooseneck. 2.This requires removal of the B and W Companion hitch and replacing it. Can I replace it with the CURT Spyder Gooseneck Hitch 25K? 3. Because it has to be attached to existing fifth wheel hitch rails, can new rails be purchased so I coud sell the B and W? To keep the process simple, I am thinking that I should go with the Helux Fifth Wheel Pin Box and stay with the existing setup. I am trying to improve the ride and reduce chucking and vibration. I am also considering replacing the leaf spring suspension and the drum brakes with disc brakes. Do you have any recommendations? At this point, I am looking at the MorRyde Independent Suspension system that would be installed by MorRyde. These are multiple questions and I appreciate any direction/recommendations you are able to render. Thank you very much.
asked by: Russell G
(click to enlarge)
(click to enlarge)
(click to enlarge)
Expert Reply:
Hey Russel, thanks for the pictures. The Curt Helux Shock-Absorbing 5th Wheel Pin Box item # C65MJ is the correct one to replace your Rota-Flex with a Lippert Rhino bolt pattern. It has a standard 5th wheel kingpin. There are no gooseneck options.
You can continue to use your B&W Companion 5th wheel hitch with the Curt Helux Pin Box item # C65MJ. You won't need the Curt Spyder item # 16085 at all so no need for 5th wheel rails.
We do not have the MorRyde Independent Suspension system but that looks like a great setup. I do not have an alternative I would recommend that will be better or even comparable to that. Looks like you can upgrade to disc brakes while you're at it too.
Are you wanting to switch over to a gooseneck connection?
Product Page this Question was Asked From
Curt Flex Air 5th Wheel Pin Box - Lippert Rhino - 21,000 lbs
- 5th Wheel Pin Box
- Upgraded Pin Box
- Absorbs Road Shock and Reduces Chucking
- 21000 lbs
- Air Ride Suspension
- Fixed Turret
- Lippert Rhino
- CURT
more information >
Continue Researching
- Search Results: rv dump valve
- Search Results: accessories and parts
- Search Results: mount n lock
- Search Results: dexter trailer axles
- Search Results: bearing seals
- Shop: Curt Helux Shock-Absorbing 5th Wheel Pin Box - Lippert Rhino - 24K GTW - 4,000 lbs TW
- Search Results: 5th wheel pin box
- Q&A: What Is The Difference Between Curt Helux Pin Box With Black Spring Vs. Orange Spring?
- Q&A: Recommended Comfort Ride Suspension Upgrade for 6,000 lbs Axles
- Shop: Curt Helux 5th Wheel to Gooseneck Shock-Absorbing Pin Box Adapter - 20K GTW - 3,900 lbs TW
- Q&A: Bearing Kit for 6k Axle of Grand Design 337RLS Fifth Wheel Trailer
- Q&A: Identifying Pin Box on 2025 Eclipse Attitude 2919SAG
- Video: Review of CURT 5th Wheel Pin Box - Helux Shock Absorbing 5th Wheel Pin Box - C65MJ
- Shop: Fifth Wheel Hitch
- Shop: Curt Flex Air 5th Wheel Pin Box - Lippert Rhino - 21,000 lbs
- Search Results: helux
- Shop: Roadmaster Comfort Ride Leaf Spring Suspension Kit w/ Shock Absorbers - Tandem 6K Trailer Axles
- Shop: TST TPMS - Color Display - Signal Booster - 4 Internal Tire Sensors
- Video: Curt Flex Air 5th Wheel Pin Box Review
- Video: Checking Out the Curt Flex Air 5th Wheel Pin Box
- Q&A: Can Curt Flexair Pin Box be Used with Pullrite Hitch
- Q&A: Cushioned Pin Box Recommendation for 2022 Jayco 321RSTS
- Q&A: Can 8k Roadmaster Comfort Ride Fit 7k Axles
- Shop: Valterra ABS Solvent Cement - 1/4 Pint
- Shop: Valterra Waste Valve for RV Black Water Tank - 3" Spigot to 3" Lug
- Video: Breaking Down the Curt PowerRide 5th Wheel Trailer Hitch for Chevy/GMC Towing Prep Package
- Shop: Suspension Enhancement
- Shop: Brake Controller
- Article: 7 Common Questions Everyone Has About Trailer Tires
Russell G.
10/15/2025
Thank you, Jerred for the guidance. I have ordered the Curt Helux Pin Box #C65MJ recommended in your response. I decided to stay with the fifth wheel pin box to keep it simple since I don’t need to use the truck bed for anything but towing the RV. Upon installation and use, I provide a review.