Will the Curt Helux Pinbox Replace a Curt Rota Flex Pin Box?

Updated 09/05/2025 | Published 09/04/2025

Question:

Can I use the Helux pinbox to replace my Curt Rota Flex on a 2020 Vanleigh Beacon 39GBB? Many thanks!

asked by: Marlon B

Expert Reply:

Possibly! Does the Curt Rota Flex pin box on your 2020 Vanleigh Beacon 39GBB say Rhino Box anywhere on it or have a 807712 part number? If so, yes!

The only pin box bolt pattern as of (09/25) that the Curt Helux like item # C83RJ fits is the Lippert, now Curt Rhino Box. It's quite a bit narrower and only has 5 mounting bolts on either side like the picture below.

If you would like to email me a picture of the sticker on your 5th wheel trailer's pin box I'll be happy to identify the bolt pattern for you. It'll have a date of manufacture, LCI item number, serial number, and weight capacity.

expert reply by: Jerred H

Curt Helux
(click to enlarge)

Marlon B.

9/5/2025

Unfortunately not a Rhino box. Hopefully they will expand their options in the near future to accommodate other pinboxs. Would you have a recommendation for a comparable pinbox I should consider for a Lippert 1621HD? GVWR is 18,000 lbs with pin weight of 4,200 lbs.

Jerred H.

9/5/2025

@MarlonB Yeah, I figured that was a longshot. I'm hoping they do too but we have not heard anything. The closest comparable pin box that would fit a Lippert 1621HD is the Curt Air Ride 5th Wheel Pin Box item # LC158778. Similar setup but an air bag instead of a coil spring.