Search for:

Weight Distribution Hitch

A hitch system with spring bars that transfers trailer tongue weight from the tow vehicle's rear axle to its front axle and the trailer's axles.

Also called: WDH, weight distribution hitch, equalizer hitch, load-distributing hitch

A weight distribution hitch (WDH) is a hitch system with spring bars that redistribute trailer tongue weight from the tow vehicle’s rear axle to its front axle and the trailer’s own axles. It’s required by most tow-vehicle manufacturers for any trailer over a specific weight threshold.

Why WDHs matter

Without a WDH, a heavy trailer’s tongue weight compresses the tow vehicle’s rear suspension and lifts the front wheels. This causes:

  • Reduced steering control (front wheels don’t grip properly)
  • Reduced braking (front brakes do most of the work)
  • Headlight aim too high (illuminating tree branches instead of the road)
  • Trailer sway under crosswind or passing trucks

A WDH transfers 30–50% of tongue weight to the front axle and the trailer axles. The result is a level-driving tow vehicle and dramatically more stable towing.

When you need a WDH

Most manufacturers require a WDH above 5,000 lb trailer weight or 500 lb tongue weight. Specific thresholds vary by vehicle:

  • Half-ton truck (F-150, Silverado 1500, Ram 1500): WDH required above ~5,000 lb
  • Three-quarter-ton (F-250, 2500): WDH required above ~8,000 lb
  • One-ton (F-350, 3500): WDH typically required above ~10,000 lb
  • SUVs: WDH required at much lower thresholds — often 3,500 lb

Check your tow vehicle’s owner’s manual for the exact threshold.

WDH brands you’ll see in rentals

  • Equal-i-zer (most common)
  • Reese Strait-Line
  • Andersen (no chains, uses a different mechanism)
  • Husky Centerline

What rental owners typically provide

For travel trailer rentals on Outdoorsy and RVshare:

  • Some owners include a WDH as part of the rental
  • Some require you to bring your own
  • Some don’t address it (assuming you’ll figure it out)

Confirm before booking. If you’re renting a 5,000+ lb travel trailer without a WDH on a half-ton truck, your rental will tow poorly and might be unsafe.

What a WDH doesn’t fix

A WDH improves weight distribution. It does not magically increase your tow vehicle’s tow capacity or GCVR. If your trailer + cargo exceeds your truck’s ratings, no hitch system can compensate.