To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.
This underbed rail kit is built for Demco’s UMS 5th-wheel and gooseneck hitches and leaves your bed completely open once the hitch is removed. The rails mount beneath the surface, with only four small mounting points that sit flush with the bed floor, so you can load gear or haul materials without bulky rails getting in the way. The design keeps the truck bed clean and usable for whatever you need when you’re not towing.
Getting the hitch system in place doesn’t require frame drilling or exhaust removal. The custom brackets bolt directly to the outside of the frame rails, and the crossmembers sit along the top of the frame under the bed for a solid connection. This setup reduces installation time compared to universal kits and keeps the frame intact while still providing a secure mount for your hitch.
Every component is made from sturdy, black powder-coated steel that resists corrosion and stands up to years of use. The kit includes the rails and all installation hardware, giving you everything you need for a dependable connection to your trailer hitch. It’s backed by a 5-year limited warranty for added peace of mind.
Customer Satisfaction Score:
93% were satisfied with this product
7% of customers were not satisfied
Ratings & Reviews

Tony C.
7/9/2018
The under bed rails and Demco hitch are great. I have put 20 thousnd miles on them with 13,654 pounds of fifth wheel trailer

Buddy R.
3/24/2019
great!

Darin
3/11/2023
This hitch has been working flawlessly for the past year. I would definitely recommend this hitch to anyone that is looking for a great sliding fifth wheel hitch.

Stanley
8/2/2023
Don’t have problem with parts , it is the service . The first time I ordered everything went great and on time . The bext time I ordered all my parts wasn’t there , I was told I would receive missing parts the day day before my travel . Then I get confirmation email that I was gonna receive my parts two days after my leave date to be told there isn’t anything they could do . Why should I lose out on my week stay in key west at a night because they didn’t send me my parts I ordered way before my leave date .
Do you have a question about this 5th Wheel Hitch Rail?
Info for this part was:
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.


















Wil K.
2/17/2020
Everything has been working great, no problems at all!