Availability Of Gooseneck Coupler Inner Tube With 3-3/4" Outer Diameter

Updated 01/19/2026 | Published 12/17/2025

Products Featured in This Question

etrailer Gooseneck Coupler w/ Load Bearing Pin - 8" Adjustment - 2-5/16" Ball - 25K

(310)

$171.93

Question:

Im looking for a round inner tube coupler for a gooseneck with a diameter of 3-3/4 inches. Do you have one? If so, can you provide that part ?

asked by: Heath W

Expert Reply:

Hello Heath. I do appreciate you reaching out, but I am sorry to say we do not offer a gooseneck coupler inner tube with a 3-3/4" OD. Everything we have is a standard 4" tube.

Do you know the brand of your gooseneck coupler? At this point the next step would be to look at replacing the entire gooseneck coupler with a new one such as the following:

- etrailer Gooseneck Coupler w/ Load Bearing Pin - 8" Adjustment - 2-5/16" Ball - 25K # e66MV

expert reply by: Jesse M

e66MV
(click to enlarge)

Jesse M.

1/19/2026

Hey Heath, did you end up finding a gooseneck coupler that matched your 3-3/4-inch tube? Knowing what worked could help others trying to replace a non-standard coupler size.