Will B&W Gooseneck Pin Box Work With 2025 Forest River Riverstone Legacy 39RKFB
Updated 08/18/2026 | Published 05/24/2026
Products Featured in This Question
Question:
Will this hitch work with a 2025 Riverstone 39RKFB. 21,000 lb GVWR, approximately 3,800 lbs pin weight. Which part number would be correct for this fifth wheel? Thank you, Jim
asked by: Jim H
Helpful Expert Reply:
Hey Jim! Yes, the B&W Gooseneck Pin Box can be used on your 2025 Riverstone 39RKFB. However, you need to determine the pin box bolt pattern to find the right model. The # BW83RV you were looking at is designed for a Lippert 1621/1621HD bolt pattern (also fits 1116/1716 with shim kit # BW57MV). If you have the Rhino Box you need # BW55RV instead.
If you aren't sure which bolt pattern is on your 5th wheel, feel free to send me a picture of the pin box sticker and I will identify it for you.
Where are you headed with the Riverstone once you upgrade your pin box?
(click to enlarge)
Charlie T.
8/18/2026
So to be clear, if I want the 4.5k tw model and I have a 1716 bolt pattern I need the 1621 pin box bw83rv along with the bw57mv shim kit?
Product Page this Question was Asked From
B&W 5th Wheel to Gooseneck Pin Box - Lippert 1621/1621HD - 25K GTW - 4.5K TW
- 5th Wheel Gooseneck Adapter
- Adapts Trailer
- 5th Wheel Trailer to Gooseneck Hitch
- No Extra Clearance
- 25000 lbs
- Replaces Pin Box
- Shock Absorbing
- Lippert 1621
- Lippert 1621HD
- B and W
more information >
Continue Researching
- Q&A: How to Determine Clearance Using B&W Gooseneck Pin Box With 2009 Ram 3500 Short Bed
- Q&A: Does the Benton MoveHitch Cargo Carrier Come with a Lock?
- Q&A: Cargo Carrier That Tilts For Easier Unloading
- Q&A: Can The Benton MoveHitch 60x24 Cargo Carrier B38VR Be Used On A 5th Wheel?
- Q&A: What is the Capacity of the Benton MoveHitch Cargo Carrier?
- Q&A: Recommended Trailer Hitch for 2027 Hyundai Tucson
- Q&A: What is the Warranty Policy for the Benton Cargo Carrier part # B38VR?
- Shop: Benton MoveHitch 60x24 Cargo Carrier for 2" Hitches w/ Cargo Net - Aluminum - Folding - 500 lbs
- Shop: Dylux RV AC w/ PTC Heating, Air Distribution Box &Thermostat - Ductless - 15,000 Btu - Black
- Shop: Rack'Em Fitz-All Enclosed Trailer Ladder Rack
- Shop: B&W 5th Wheel to Gooseneck Pin Box - Lippert Rhino - 25K GTW - 3.25K TW
- Shop: Aluminum Siberian Trailer Wheel - 16" x 6" Rim - 6 on 5-1/2 - Gunmetal Gray
- Shop: Trailer Hitch
- Article: Trailer Wiring Diagrams
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Search Results: trailer hitch
- Video: Furrion Chill Cube RV Air Conditioner Review and Installation - Travel Trailer Edition
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Shop: Trailer Wiring
- Search Results: trailer tires and wheels
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Suspension Enhancement
- Search Results: trailer jack
- Article: 30-Amp and 50-Amp RV Service: What's the Difference?
- Shop: Fifth Wheel Hitch
- Article: What are the Common Types of Propane Fittings Used on RVs?
- Search Results: trailer wiring
- Shop: Gooseneck Hitch
- Search Results: rv air conditioners
- Article: RV AC Not Cooling? What's Normal, What to Check, and When to Replace
Jim H.
5/28/2026
We have a trip planned to Theodore Roosevelt NP, Glacier NP, and Yellowstone NP but not sure I can work in the upgrade before we leave. We will make the change before we head to AZ for the winter.