The coupler is the metal piece that actually connects your trailer to the tow vehicle. Once the coupler is permanently bolted or welded to your trailer’s frame rails (the “tongue”), it fits over the round ball hitch attached to your vehicle. Latches of various types on the coupler clamp around the round ball tightly enough to prevent it from disconnecting, but they allow just the right amount of play for proper pivoting around turns.
Couplers are subject to a large amount of wear and tear. They move and bounce around on top of the trailer ball as you’re driving. They are exposed to the elements. Eventually, the release mechanism becomes sticky, the fit on the trailer ball becomes loose, or corrosion compromises its functionality. Replacing your coupler may become necessary to ensure that your trailer-to-hitch connection remains as secure as possible. Shop for a new coupler here.
Trailer tongue shape determines the type of coupler you’ll need. Most trailer tongues are known as an “A-frame” where the two frame rails join together at a 50 degree angle at the front of the trailer. This is the industry standard. Some vintage trailers may have a “straight” tongue; when one single frame rail serves as an attachment point. Shop for a new coupler here.
A-frame couplers are designed to fit over the very front end of the trailer where the frame rails join together. Since industry standards specify a 50-degree angle, there’s no special concern needed when purchasing any A-frame coupler, except for personal preference when it comes to choosing a trigger latch or sliding collar release mechanisms. (bottom right). A-frame couplers are usually intended to be welded onto the trailer frame rather than bolted in place. If you don’t have the ability to weld your coupler yourself, a professional welder, or even a muffler shop, can complete simple welding tasks like this that may arise during your restoration.
Hitch balls come in 1 7/8” and 2” and 2 5/16” sizes. 2” being the most popular on vintage camper trailers. To tow safely you must have a coupler that matches the size of your ball. Be sure your latch is functioning properly and that you always pin the latch to insure that it stays latched and keeps the trailer secure as you drive. A trailer that detaches from the trailer while you’re towing is not going to make for a great weekend. Shop for a new coupler here.
