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  1. Weight Distribution Hitch
  2. Equal-i-zer
  3. 200 lbs
  4. 300 lbs
  5. Fits 2 Inch Hitch
  6. WD With Sway Control
Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 4,000 lbs GTW, 400 lbs TW
Equal-i-zer

Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 4,000 lbs GTW, 400 lbs TW

Part Number: EQ90-00-0400
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$665.47
Retail:$920.00
You Save: $254.53
Weight Distribution Hitch
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The Equal-i-zer has a reputation as strong as its American-made steel. We love this hitch's solid build quality and that it helps to proactively stop trailer sway instead of just dampening it after it starts. Adjustable shank included. Great Prices for the best weight distribution hitch from Equal-i-zer. Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 4,000 lbs GTW, 400 lbs TW part number EQ90-00-0400 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Equal-i-zer Weight Distribution Hitch - EQ90-00-0400

  • 200 lbs
  • 300 lbs
  • Fits 2 Inch Hitch
  • WD With Sway Control
  • Allows Backing Up
  • Equal-i-zer
  • Includes Shank
  • Some Sway
  • Electric Brake Compatible
  • Surge Brake Compatible

The Equal-i-zer has a reputation as strong as its American-made steel. We love this hitch's solid build quality and that it helps to proactively stop trailer sway instead of just dampening it after it starts. Adjustable shank included.


Features:

  • Evenly spreads out your tongue weight among all the axles of your tow vehicle and trailer
    • Levels out your ride to restore control and stability
    • Lets you tow to the max capacity of your hitch
  • Built-in sway control stops trailer sway before it begins
    • Maintains tension throughout the entire system
    • Holds your trailer in line with rigid, frame-mounted brackets
    • Uses steel-on-steel friction to combat any sway that occurs
  • Compatible with surge-type brake actuators
  • Desired head tilt is achieved using stackable washers
    • Add or remove washers from the spacer rivet in the hitch head
  • No-drill, clamp-on brackets can be adjusted along your trailer frame
    • Accommodates frame-mounted items such as gas tanks, battery boxes, tool boxes, or generators
  • Chromoly steel spring bars offer superior dexterity for a controlled, even ride without the bounce
  • Dipped steel construction is durable and corrosion resistant
  • System includes head assembly, adjustable shank, spring bars, sway control brackets, lift handle, pin and clip, and all necessary hardware
    • Hitch ball sold separately - requires 1-1/4" diameter shank that does not exceed 2-3/8" in length
  • Made in the USA


Specs:

  • Fits: 2" x 2" trailer hitch receivers rated for use with weight distribution systems
  • Maximum tongue weight: 400 lbs
  • Gross towing weight: 4,000 lbs
  • Sway control bracket positioning: 29" - 32" back from center of coupler
  • Maximum trailer frame height: 6"
  • Shank length:
    • 8" From center of hitch pin hole to center of adjustment holes
    • 9" From center of hitch pin hole to front of shank
    • 7" From center of hitch pin hole to back of shank
    • 12" Overall
  • Total height adjustment along shank: 7-1/2"
    • Maximum rise: 7"
    • Maximum drop: 3"
    • Overall height: 9-1/2"
    • Holes are spaced 1-1/4" apart on center
  • Spring-bar dimensions: 35-1/2" long x 1" wide
  • Requires 5/8" shank bolt (EQ90-02-9400 - sold separately)
  • Limited lifetime warranty


Dimensions

Included w/ EQ90-00-0400 Required - Sold Separately Optional Add-Ons
  • Adjustable Shank
  • System Head
  • Sway Control Brackets
  • Spring Bars
  • Hitch Ball w/ 1-1/4" Diameter Shank
    • 2-3/8" Maximum Shank Length
n/a


Pro Tip: Before you invest in a weight distribution hitch, make sure your cargo is evenly loaded in your trailer to keep the weight balanced. If you still have a hard time even after balancing your tongue weight, a weight distribution hitch should help.


Put Trailer Sway on Lockdown

An infographic shows the 4 points of upward and downward forces interacting to create sway control in the Equal-i-zer weight distribution system

  • Other sway control systems reduce sway, but Equal-i-zer's system prevents it
    • System head holds everything tightly in place at the connection point
    • L-brackets hold your trailer in line along the frame
    • Steel-on-steel friction between L-brackets and bars forces trailer back in line if any sway still occurs
  • This system performs extremely well, but it's going to be noisy because of the steel-on-steel design
    • You can lubricate the L-brackets or cover them with special jackets to cut down on the screech, but you'll lose out on some of the sway-reducing friction
    • If superior performance, American-made quality, and noiseless operation are all must-haves in your book, check out the B&W Continuum or the Blue Ox SwayPro instead

Does it seem like no matter where you go, you meet someone who owns - and has vouched for - the Equal-i-zer weight distribution system? There's one really good reason for this: the Equal-i-zer's build quality is second to none. Many companies have tried to imitate it, and they just can't. Sure, they might preempt trailer sway just as the Equal-i-zer does. But for over 75 years, using American-made steel, the Equal-i-zer's unique design has kept haulers from white knuckling the steering wheel.


Points within the Equal-i-zer system where upward and downward forces interact to create rotational friction

Let's talk about how it does that. Essentially, this system is built to hold your trailer in place both at the connection point and along the trailer's frame. Inside the system head, the trunnions are tightly pinched in place to create resistance. Because the trunnions are held in so tightly in the head, with the help of some torqued socket bolts, once the spring bars are installed, they won't be able to move side to side without a ton of resistance. At the other end of the bars, frame-mounted L-brackets provide a rigid surface that also helps prevent any unwanted movement. Just like the tension in the head, these brackets help hold your trailer in place. All of this tension throughout the system helps to create a rigid steel-on-steel setup that keeps your trailer in line and your ride level.


A close-up image shows where the spring bar grinds on the steel bracket

If a particularly strong wind gust crosses your path and your trailer starts to get off track despite the Equal-i-zer's firm hold, the steel-on-steel friction of the bars on their brackets will stop the bars from moving, and ultimately dampen any remaining trailer sway. Between the 2 friction points inside the system head and the 2 that you get at the L-brackets, the Equal-i-zer creates up to 3 times more side-to-side resistance than other weight distribution systems, or the equivalent of adding 8 friction sway bars. And because you won't need any of those add-on sway bars, you'll actually be able to use this system when towing in the rain or over gravel roads, and you can back up without having to disconnect a thing!


Because the steel-on-steel friction between the bars and brackets is noisy, don't be alarmed if you hear a lot of banging, creaking, and grinding. It's just the system working to correct sway in much the same way that locomotives keep multi-ton railcars from swaying. If the noise becomes too much of an issue for you, there are a few things you can do to address it. You could get some of Equal-i-zer's replaceable nylon sway bracket jackets (EQ95-01-5150). Or you could lubricate any friction points with their high-performance lubricant (EQ91-00-4250). But keep in mind that cutting down on noise isn't the only thing this will do. These quick fixes will limit the system's ability to prevent sway, too.


If you're determined to have a rock-solid towing setup without making any compromises, and you have to have an an American-made weight distribution hitch, and noise is kind of a deal-breaker for you, you may want to spring for the B&W Continuum or the Blue Ox SwayPro instead.


Adjusting the Head Tilt

A close-up image of the Equal-i-zer hitch head shows the rivet and washers during installation

  • Adding washers adds tension, but it's not a case of "the more the merrier"
  • Stacking washers can be a pain, but you only need to do it once, or if your tongue weight changes

Once you've got the hitch ball torqued down, you'll have to adjust the tilt of the head to ensure proper leverage. To do this, simply slide washers onto the spacer rivet and insert it into the head assembly. Once the spacer is in place, tighten the shank bolts to secure the head to the shank. To check if your truck and trailer are level, you'll need to hook up and release your tongue jack. If you find that the rear of your truck is still sagging, add washers to increase leverage. If it looks like too much weight has been taken off your truck's rear axle and is sitting on your front axle, try removing a few washers.


While the washer-stacking method allows you to fine-tune the setup at the time of installation, it's going to require some patience. It can be time consuming because, if you don't get everything right the first time (which, you probably won't), you'll have to take the head unit apart to adjust the washers. You might have to raise or lower the L-brackets too to get the tension just right, and that's a bit of a pain also. Not to mention that you might have to repeat this process if your tongue weight changes or if you swap out your tow vehicle.


Pro Tip: For a step-by-step guide on how to fully install the Equal-i-zer, check out our videos at the top of this page. Our installers even have some advice to offer on measuring your vehicle's squat.


Why Use a Weight Distribution Hitch?

Diagram showing weight distribution on a truck and towing a camper

  • Prevents uneven tire wear on your vehicle and trailer
  • Keeps the rear of your tow vehicle from sagging
  • Lets you tow to the max capacity of your trailer hitch
  • Stops your headlights from pointing up at the sky
  • Gives you control over steering your rig

Selecting the Right Weight Distribution System

  • Think "Goldilocks"
    • If you go for overbuilt, you'll have a rigid ride
    • If it's not strong enough, it's virtually useless
  • Let your tongue weight be your guide

Your tongue weight is the first thing you need to know when figuring out which weight distribution system you need. Most people think that if they get the highest-rated system possible, it'll be smooth sailing. But actually, this will create a rigid ride and a bouncing trailer. On the other hand, if the system isn't strong enough, it won't be able to distribute the weight properly, making it virtually useless.


Once you know your trailer's tongue weight, add it to the weight of the cargo behind the rear axle of your tow vehicle. Then just choose a weight distribution system rated for that combined tongue weight.



90-00-0400 Equalizer Weight-Distribution Hitch with Adjustable Shank - 4,000 lbs

Installation Details EQ90-00-0400 Installation instructions




Customer Reviews

Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 4,000 lbs GTW, 400 lbs TW - EQ90-00-0400

Average Customer Rating:  4.8 out of 5 stars   (785 Customer Reviews)

The Equal-i-zer has a reputation as strong as its American-made steel. We love this hitch's solid build quality and that it helps to proactively stop trailer sway instead of just dampening it after it starts. Adjustable shank included.

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