Equal-i-zer Weight Distribution Hitch: Complete Review & Sizing Guide

By H. Kent Sundling (MrTrailer) | Updated October 2026

#image_Boats too

When towing heavy travel trailers, toy haulers, or equipment trailers, controlling lateral trailer sway is critical for highway safety. The Original Equal-i-zer 4-Point Sway Control Hitch has been an industry benchmark for decades, combining weight equalizing physics with integrated rotational and linear friction resistance. One of the few WDH’s that work with boats and surge brakes.

Key Takeaway: Unlike traditional chain-hung hitches that require add-on friction bars, the Equal-i-zer system uses rigid steel spring bars and heavy-duty frame brackets to deliver sway control and weight distribution in a single integrated design.

What Is the Original Equal-i-zer 4-Point Sway Control Hitch?

#image_Equalizer WDH

The Equal-i-zer hitch is engineered to restore proper front-axle load on your tow vehicle while resisting side-to-side trailer motion caused by crosswinds, passing semi-trucks, and uneven road surfaces.

How Integrated 4-Point Sway Control Works

The patented 4-point system operates across two key friction zones:

Points 1 & 2 (Rotational Head Friction): Heavy-duty downward and upward clamping force in the hitch head creates continuous rotational resistance at the pivot pins.
Points 3 & 4 (Linear Bracket Friction): Rigid forged steel spring bars rest on frame-mounted L-brackets, generating progressive linear friction as the trailer attempts to pivot. Equalizer WDH Video

Equal-i-zer Hitch Sizing & Capacity Ratings

Selecting the right hitch rating depends on your trailer’s fully loaded tongue weight rather than dry catalog specs:


Model Rating (GTW)	Max Tongue Weight (TW)	Recommended Trailer Types
6,000 lbs	600 lbs	Lightweight travel trailers, small horse trailers (1–2 horse)
10,000 lbs	1,000 lbs	Mid-size travel trailers (24–30 ft), loaded cargo haulers
12,000 lbs	1,200 lbs	Large travel trailers (30+ ft), heavier multi-horse trailers
14,000 lbs	1,400 lbs	Heavy toy haulers, equipment trailers, luxury travel trailers
16,000 lbs	1,600 lbs	Commercial-grade bumper-pull trailers, heavy equipment rigs

Equal-i-zer vs. Andersen & Traditional Hitches

To understand how the Equal-i-zer compares against alternative systems like the Andersen No-Sway Weight Distribution Hitch and classic chain-hung hitches, review the side-by-side comparison below: https://mrtruck.com/equalizerwdh.htm

Feature / Metric	Equal-i-zer 4-Point WDH	Andersen ‘No-Sway’ WDH	Standard Round-Bar / Chain WDH
Sway Control Tech	4-Point head and L-bracket friction	Internal ball friction cone + chains	Add-on friction sway bars
Max Capacity	Up to 16,000 lbs GTW	Up to 14,000 lbs GTW	Typically 6,000 to 12,000 lbs GTW
Backing Up / Reversing	Full reverse allowed	Full reverse allowed	Must remove friction bars
Spring Bar Design	Rigid forged steel bars	Tension chains with urethane bushings	Flexible round bars hung on chains
Noise Level	Normal friction groan (nylon pads optional)	Virtually silent operation	Creaking and popping during turns
Maintenance	Grease on head sockets; clean L-brackets	Greaseless ball; no lube required	Frequent grease on trunnion sockets

#image_kit

Installation & Adjustment Guide

Measure Uncoupled Wheel Well Heights: Measure from the ground to the top of your tow vehicle’s front and rear fender wells before hitching.
Adjust Head Tilt (Spacer Washers): Insert spacer washers onto the head tilt pin to adjust downward angle and increase load transfer to the front axle.
Position the L-Brackets: Mount the trailer frame L-brackets 27″ to 32″ back from the coupler center and ensure they sit level with the spring bars.
Verify Front-End Restoration: Lower the trailer weight onto the ball and engage the spring bars with the snap-up lever. Check that the front fender height returns to within 1/2″ of its unloaded measurement.

Frequently Asked Questions

#image_Equaizer WHD

Can you back up a trailer with an

Equal-i-zer hitch attached?

Yes. Because the 4-Point Sway Control is built directly into the hitch head and rigid L-brackets without separate friction bars, you can reverse, make tight turns, and back into campsites without disconnecting or loosening any components.

How do I choose the correct Equal-i-zer hitch model size?

Select a model based on your trailer’s loaded tongue weight (including full water tanks, LP tanks, battery, and cargo loaded behind the truck axle). Your loaded tongue weight should fall within the hitch’s rated range.

How do you stop an Equal-i-zer hitch from squeaking during turns?

Squeaking is normal and indicates the friction surfaces are actively resisting sway. To reduce noise without sacrificing performance, keep the hitch head pivot sockets greased and install official Equal-i-zer Sway Bracket Jackets (nylon pads) onto the frame L-brackets. https://mrtruck.com/equalizerwdh.htm

Related Reviews: Read our field test of the Andersen ‘No-Sway’ Weight Distribution Hitch

MrTruck, Kent Sundling. First 32 years on the farm, moved to the big city to sell trucks to save the farm AD (after the divorce) sold pickup trucks for 10 years in Denver. Last 26 years I review trucks, trailers and towing accessories in horse magazines, Farm Journal, Fence Post and on RFD TV. Now I’m a trailering expert helping newbies be safe towing a trailer.

Kent

First 32 years on the farm, moved to the big city to sell trucks to save the farm AD (after the divorce) sold pickup trucks for 10 years in Denver. Last 26 years I review trucks, trailers and towing accessories in horse magazines, Farm Journal, Fence Post and on RFD TV. Now I'm a trailering expert helping newbies be safe towing a trailer.

See Full Bio