Trailer Coupler

A trailer coupler is a critical mechanical component that joins the trailer’s tongue to the tow vehicle’s hitch ball, enabling secure towing and effective load transfer; it must match the hitch ball size (commonly 2") and the trailer’s Gross Vehicle Weight Rating (GVWR) to ensure safe operation. Constructed from high-strength steel—often with powder or zinc coating—the coupler employs a latch mechanism (such as the patented wedge-latch design) that locks firmly over the hitch ball to maintain connection under dynamic loading. Adjustable-height couplers accommodate various towing setups, helping to keep the trailer and tow vehicle level, which is key to reducing sway and uneven tyre wear. Whether bolt-on or weld-on, the coupler’s design must comply with established safety standards, and its materials and construction influence both longevity and maintenance frequency.