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If you need to pull your gooseneck trailer with a fifth wheel hitch, this inner tube makes the swap simple. It replaces your existing gooseneck coupler tube and gives you a standard 2" king pin connection, so you can hook up right to a fifth wheel hitch. The square inner tube fits standard 4" outer tubes, making it an easy drop-in upgrade for mixed towing setups.
When you’re hauling serious weight, this adapter is built to hold up. It’s rated for 30,000 lbs gross towing weight, letting you move heavy equipment or large trailers with confidence. The sturdy steel construction and heavy-duty design deliver peace of mind every time you hitch up.
You can dial in your setup for a level ride thanks to the 8" range of vertical adjustment. The holes are spaced 2-11/16" apart on center, and the pin hole diameter is 13/16". From the plate to the top adjustment hole there’s 15" of length, giving you flexibility to fine-tune your trailer height for proper clearance and weight balance.
The welded 10" x 10" plate, 2.36" gussets, and .354" skid plate thickness give this coupler its solid feel. It’s compliant with SAE J2638 standards, so it meets performance and safety specs for heavy-duty towing gear. Weighing 54 lbs, this piece is made to handle years of tough use without flex or fatigue.
This adapter uses a standard 2" diameter king pin, so it works with most fifth wheel hitches and even many commercial setups. You can also add a universal capture plate like the Pullrite 3317 if your hitch requires it. For anyone who needs to tow a gooseneck trailer behind a fifth wheel setup, this coupler tube delivers straightforward connection and reliable performance.
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews
Daniel
8/29/2024
The 5th wheel coupler adapter works outstandingly! Very strong, no problems with it. Highly recommend!
Katrina D.
12/16/2023
These Coupler adapters are bare metal. Since there is no coating, it is susceptible to rusting. You can clean off the rust by using some vinegar and coating the hitch generously. Then you can ball up some aluminum foil and begin scrubbing the hitch ball. This will scrape off any rust and polish the material. Once you have that cleaned off, then you can use a rust oleum type of paint to cover the adapter to prevent any future rust issues.
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Norman A.
7/22/2017
It is working very well