The B&W Continuum WDHH4500 is the head unit assembly for B&W's Continuum weight distribution system, rated for up to 16,000 lb gross trailer weight. Whether you're replacing a worn head unit or upgrading to the Continuum's continuous-spring-bar design, this is the component that mounts directly to your ball mount shank and manages the load transfer across your tow vehicle's axles. Built in the USA with B&W's precision machining standards, this head unit delivers consistent, repeatable weight distribution without the sway chain setup required by older friction-style systems.
The B&W Continuum system is built around a continuous spring bar design that applies weight distribution force evenly and progressively -- no chains, no hooks, no hammers. The WDHH4500 head unit is the heart of that system, housing the pivot mechanism and spring bar retention that defines the Continuum's clean, tool-friendly setup.
At 16,000 lb GTW capacity, this head unit is sized for serious towing -- fifth-wheel-comparable loads on a conventional receiver, large travel trailers, toy haulers, and horse trailers commonly found in the 12,000 to 16,000 lb range. The 2-inch shank fits standard 2-inch receiver hitches rated for the appropriate tongue weight and GTW.
Handles heavy travel trailers and horse trailers up to 16,000 lb gross trailer weight with appropriate tongue weight distribution.
No chains or hooks -- the continuous spring bar engagement means faster hookup and more consistent load leveling every time.
Fits standard 2-inch square receiver hitches. Verify your hitch receiver's GTW and tongue weight ratings before installing.
B&W fabricates the Continuum line at their Humboldt, Kansas facility -- the same shop that builds their gooseneck and fifth wheel products.
B&W offers the Continuum weight distribution system as a complete kit and also sells individual components for owners who need to replace a specific part. The WDHH4500 is the head unit only -- it does not include spring bars, a ball, or a sway control device. If you are replacing only the head on an existing Continuum 16K setup, this is the correct part. If you need spring bars, order them separately as B&W Continuum spring bar sets matched to the 16K capacity.
The Continuum system is distinct from B&W's Tow & Stow and standard ball mount products. The head unit pivot and spring bar retention are proprietary to the Continuum family, so Continuum spring bars are not interchangeable with non-Continuum heads.
The WDHH4500 head unit is designed to work with B&W Continuum 16,000 lb-rated spring bars. It fits any tow vehicle with a 2-inch receiver hitch rated for the appropriate tongue weight. Common applications include:
This listing is for the WDHH4500 head unit assembly only. Verify what you need before ordering:
The WDHH4500 installs into a standard 2-inch receiver using the included shank and hitch pin. Set the ball height by adjusting the shank insertion depth to achieve a level or very slightly nose-down trailer attitude when loaded and hitched. B&W recommends setting the spring bar tension so front axle weight is restored to at least 90 percent of the unhitched measurement.