Converting Sidewinder to Gooseneck
Updated 01/24/2026 | Published 01/17/2026
Products Featured in This Question
Question:
Looking to convert a Sidewinder king pin to gooseneck. What products do you offer for this? Thanks
asked by: Clayton D
Expert Reply:
Hi Clayton; there are several ways to do this. If you want to leave the sidewinder on your 5th wheel you're going to have to lock it out so it doesn't rotate anymore. This will allow you to use an adapter like the Convert-A-Ball Cushioned 5th-Wheel-to-Gooseneck Adapter # CAB-C5G.
The other option is to completely replace the pin box with one like the MORryde GooseTech 5th Wheel to Gooseneck Pin Box # MR37MV. This particular pin box fits a Lippert 1621 bolt pattern and trailers with an 11,501-lb - 14,000-lb GVWR. If you can tell me your pin box bolt pattern and the GVWR of your trailer I can help you find the right replacement.
What makes you want to switch to a gooseneck setup?
(click to enlarge)
Sylvia P.
1/19/2026
He loves it
Ried
1/24/2026
it works really well and I don't have to store a 5th wheel hitch or take up room in my bed either.
Product Page this Question was Asked From
Convert-A-Ball Cushioned 5th-Wheel-to-Gooseneck Adapter - 12" to 16" Tall - 20,000 lbs
- 5th Wheel Gooseneck Adapter
- Adapts Trailer
- 5th Wheel Trailer to Gooseneck Hitch
- No Extra Clearance
- 20000 lbs
- Bolts Over King Pin
- Shock Absorbing
- Convert-A-Ball
more information >
Featured Help Information
Instructions
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on 5th Wheel Gooseneck Adapter
Neil M.
1/18/2026
I had this on my camper for 4 to 5 years, works great. We have a shorter camper and even pull a boat with our camper at least twice a year with no problems. Like the ease of hook up and disconnect. Installation would be helpful to have two people to help and use tailgate of bed to help support while attaching to trailer.