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  1. Weight Distribution Hitch
  2. Equal-i-zer
  3. 1000 lbs
  4. 1100 lbs
  5. Fits 2 Inch Hitch
  6. WD With Sway Control
Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 12,000 lbs GTW, 1,200 lbs TW
Equal-i-zer

Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 12,000 lbs GTW, 1,200 lbs TW

Part Number: EQ37120ET
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$850.00
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. Ball and 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 - 12,000 lbs GTW, 1,200 lbs TW part number EQ37120ET 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 - EQ37120ET

  • 1000 lbs
  • 1100 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. Ball and 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, hitch ball, lift handle, pin and clip, and all necessary hardware
    • 1-7/8" Thin walled socket (EQ70-00-4800 - sold separately) recommended for hitch ball installation
  • Made in the USA


Specs:

  • Fits: 2" x 2" trailer hitch receivers rated for use with weight distribution systems
  • Tongue weight: 800 lbs - 1,200 lbs
  • Gross towing weight: 12,000 lbs
  • Ball size: 2-5/16"
  • Lift-bracket positioning: 27" - 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 1-1/2" wide
  • Limited lifetime warranty


Dimensions

Included w/ System Required - Sold Separately Optional Add-Ons

90-00-1200 Equal-i-zer Weight Distribution Hitch

  • Weight Distribution Shank
  • Weight Distribution Head
  • 2-5/16" Chrome Hitch Ball
  • 2 Sway Control Brackets
  • 2 Spring Bars
  • Snap-up Lever
  • Spacer Rivet and Washers
  • Hitch Pin and Clip
  • Necessary Installation Hardware
n/a
  • Thin Walled Socket for Installation of Hitch Ball


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.



EQ37120ET Equalizer Weight Distribution Hitch with Adjustable Shank and Hitch Ball - 12,000 lbs

Installation Details EQ37120ET Installation instructions



Customer Satisfaction Score:


Customer Reviews

Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 12,000 lbs GTW, 1,200 lbs TW - EQ37120ET

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. Ball and shank included.

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See what our Experts say about this Equal-i-zer Weight Distribution Hitch

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    I wish you would have asked this question prior to your purchase of the Curt Extender # C45791, because this extender will not work for your application. It is rated for the 3,500 lb total trailer weight towing capacity and because it is an adapter will also decrease your tongue weight rating of your trailer hitch by 50%. Instead, you may want to consider the Brophy Ball Mount for 2" Hitch # BH20. This ball mount is capable of towing 10,000 lbs and has a measurement of 13-1/4 inches...
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  • Recommended Equal-i-zer Hitch For A 2024 Jayco Flight 225MLS And Instruction Manual
    Hello Ron. I was able to find the instructions for the 12K Equal-i-zer Hitch # EQ37120ET and I have linked those instructions for you below. So, it is a slightly higher rated hitch, but the instructions will be the same. As far as your 2024 Jayco Flight 225MLS, the # EQ90-00-1000 is a great choice. You are correct that you will need to buy a ball separately, and for that I recommend part # EQ91-00-6100 which is a 2-5/16" ball. You will also need a thin walled socket like part # EQ70-00-4800.
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    For your 20 Foot Outback Enclosed Trailer, the Reese Friction Sway Control Kit - Economy # 83660 will use friction to minimize the movement by basically sandwiching the moving bar. This will allow for turning to still happen without issue, but will need to be removed for backing up, which is easy with a single pin removal. You will also need the bracket # RP26003 for an easy installation of the friction sway control ball. I've attached an article to assist. A single friction sway control...
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  • Can a Trailer with an Equalizer Weight Distribution System Be Backed Up with Spring Bars Installed
    The Equalizer Weight Distribution system part # EQ37120ET does allow you to back up without having to disconnect anything. As long as you aren't jackknifing the trailer this system can be backed up without any issues. If you did need to make some tight turns while backing you would need to disconnect the spring bars.
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  • Recommended Weight Distribution System for a 8,800 lbs Trailer
    Hey David thanks for the information! I recommend the Equal-i-zer Weight Distribution System w/ 4-Point Sway Control item # EQ37120ET. This system has a tongue weight range of 800 lbs - 1,200 lbs so you'll be covered if you load your trailer up with more weight. The built-in 4-point sway control will keep your trailer in line with your F-150 when you're going down the road and make a sudden move or get passed by a semi. I really like the Equal-i-zer Weight Distribution Hitches like item...
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  • What is the Correct Equal-i-zer Weight Distribution System?
    I would not be able to tell you which Equal-i-zer system to get because in order to determine if you need the 1,200 lbs system # EQ37120ET or 1,400 lbs system # EQ37140ET you have to know your total tongue weight (TTW), which is the which is the tongue weight of your fully loaded and ready to go Jay Flight RKS plus the weight of any cargo behind the rear axle of your 2013 FX2. To determine your trailer's loaded tongue weight, you can use a scale such as the etrailer # e99044 or by use...
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  • Lifted Truck Still Sagging with Equal-i-zer Weight Distribution System
    The adjustments for the Equal-i-zer Weight Distribution Systems like part # EQ37120ET will pertain to adding and removing washers from the head to try and get the spring arms as parallel with the trailer frame as possible. However, this may not completely level your vehicle. The majority of these systems are only designed to gain back half of what you lost and since your vehicle is lifted, there is an even greater chance that the vehicle will not be completely level. If you still seek...
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  • How to Select Correct Weight Distribution/Sway Control System
    Weight distribution/sway control (WD/SC) systems need to be tuned to your trailer tongue weight in order to work properly. A system rated too low for your actual tongue weight (TW) will not have the stiffness needed to shift trailer TW forward to the vehicle's front axle - what it is intended to do - and one rated too high will be too stiff and cause the trailer to exhibit weird handling. Ideally the total TW, which is the combination of the loaded trailer's measured TW plus that of any...
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  • Equalizer or Blue Ox Weight Distribution for 7,500 lb Trailer
    Between Equalizer and Blue Ox I would go with the Equalizer hands down. Equalizer systems are among the nicest systems you can use. The Blue Ox systems work decently but in terms of sway reduction, ease of install, and reliability the Equalizer is the way to go. You would want the part # EQ37120ET which would work great on your trailer that weighs 7,500 lbs. It comes with a hitch ball but you would need the thin walled socket part # ALL643216 to install it.
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  • Recommended Equal-I-zer Weight Distribution Hitch for Ice Castle Fish House Trailer
    For your Ice Castle Fish House, the weight of the unit will determine what Equal-I-zer system will work best. A weight distribution system is based on the total tongue weight of the loaded trailer along with any cargo weight behind the rear axle of the tow vehicle. Because these trailers are fairly good sized, I'll give you a recommendation for a larger system. You want that total tongue weight to fall in the middle of the range of the system for best results. For a total tongue weight...
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  • Recommended Weight Distribution Hitch & Suspension for 2015 Toyota CrewMax Tundra & 27 Foot Trailer
    Don't worry I can help. The anti-sway unit that the dealer put on your trailer will not allow you to backup like you want to. This is because it is constantly putting force onto the trailer and when backing up it will be easier to jack-knife. This anti sway bar is an effective sway when used in the towing position because it makes the trailer want to track the vehicle. I would recommend the Equal-i-zer system # EQ37100ET you were previously looking at over the Curt TruTrack based on...
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  • Recommended Weight Distribution for Towing a 20 Foot Trailer with a 2017 Ram 1500
    A weight distribution (WD) system is needed when the trailer weighs at least half of the curb weight (unloaded weight) of the tow vehicle. Since this is the case with your 2017 Ram 1500 and the 20' travel trailer you are looking at I definitely recommend using a WD system. For your application I recommend the Reese Strait-Line # RP66083 because it uses a dual-cam sway control that works to prevent sway before it starts instead of correcting it after it starts. This has a tongue weight...
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  • Does Tongue Weight Need to be Factored After Weight Distribution System is Installed and Setup
    If you have a properly rated and setup weight distribution system installed on your towing setup like you mentioned and you are under the towing capacity for the vehicle you do not need to worry about the tongue weight figure. Also, a tongue weight scale is not compatible with any of the systems we have and would not be accurate either due to the spring bar tension.
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  • Will 600 lb Spring Bars Work With 1,200 lb Equal-i-zer System?
    In order to use the 600 lb TW Replacement Spring Bars for Equal-i-zer Weight Distribution Systems # EQ90-01-0699 on your Equal-i-zer Weight Distribution System # EQ37120ET you also need to replace the head unit because the spring bars have slightly different dimensions and the 600 lb TW bars won't fit hte 1,200 lb TW system. So to use 600 lb bars # EQ90-01-0699 you need the Replacement Head for Equal-i-zer Weight Distribution Systems # EQ90-02-0600.
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  • What Size Trailer Tongues Do Reese and Equal-i-zer Pole Tongue Adapters Fit?
    I assume you were talking about the tongue width and tongue height that the respective pole tongue adapters fit. The Reese Pole-Tongue Adapter # RP58393 fits tongues that are between 1-5/8" and 5" wide and between 3" and 6" high while the Equal-i-zer Pole-Tongue Adapter # EQ95-01-5950 fits trailer tongues between 1" and 5" wide and between 2" and 5" high.
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  • Recommended Weight Distribution System for Forest River Travel Trailer with 5436 GVWR
    For your Forest River RV with a 5436 GVWR, I recommend the Equal-i-zer Weight Distribution System w/ 4-Point Sway Control # EQ37100ET. This weight distribution system recommendation is based on your total tongue weight. Most trailers have between 10 and 15 percent of the total weight as the tongue weight, then you also need to add any cargo weight behind the rear axle of your truck to your loaded tongue weight. This gives you the total tongue weight for your weight distribution system...
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  • Weight Distribution Hitch for 2018 Coleman 263 BH Tandem Axle Travel Trailer GVWR 7600-lbs
    The specs I found for the 2018 Dutchmen Coleman Lantern 263BH tandem axle travel trailer indicate a dry weight of 5871-lbs and a payload capacity of 1729-lbs. Added together these become the GVWR for the trailer, the gross vehicle weight rating, the most it can weigh when fully loaded and ready for the road. In this case that GVWR is 7600-lbs. The rule of thumb is that a trailer must have tongue weight (TW) of 10 to 15-percent of the trailer's gross weight. I would suggest to try to stay...
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  • Weight Distribution for Dump Trailer with 8 Inch Tall I-Beam Frame
    I do have a great option for you but a Reese system is not going to be the best choice in this case. You will need to box the trailer frame where the weight distribution brackets will go by having steel plates welded on. What you can use is an Equal-I-zer system, # EQ37120ET as an example, and then add 2 outer link plates, # EQ90-02-5378, sold in quantities of 1, and 2 inner link plates, # EQ90-02-5208, also sold in quantities of 1. That would allow you to use the system on an 8 inch...
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  • Weight Distribution Hitch for 2019 Ram 1500 Towing 33-Foot Travel Trailer
    You will definitely gain handling benefits from using a properly-rated and correctly-installed weight distribution/sway control hitch when towing your 33-foot travel trailer with your Ram 1500. Your loaded TW is going to be right around 1000-lbs so good systems that match are the Equalizer # EQ37120ET and the Reese Steadi-Flex # RP66560 that both work for 800 to 1200-lbs tongue weight (TW). Just add an appropriate size hitch ball to complete these systems, either # A-90 (2-inch) or #...
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    Congrats on the new truck! I saw you were looking at suspension enhancement but I want to point you towards using a weight distribution system to address the sagging. It will level out your truck and trailer by transferring some of the weight from your Ram's rear axle to the front. Your 2021 Forest River Vibe 26RK has a tongue weight right around 1,000 lbs when fully loaded. With this in mind, I recommend the Equal-i-zer Weight Distribution System w/ 4-Point Sway Control item # EQ37120ET....
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  • Looking For Weight Distribution System For 2023 Stealth Cobra Enclosed Trailer With Short Tongue
    Hello Brian, thanks for reaching out. How short is the tongue on your enclosed trailer exactly? I ask because it sounds like this will be the main factor in choosing your weight distribution hitch. For example, a really good option for a 9,900 lb GVW trailer is the Equal-i-zer Weight Distribution System w/ 4-Point Sway Control # EQ37120ET. The brackets for this system must be placed on the frame 27" - 32" back from the center of the coupler. I suggest you measure the tongue of your trailer...
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  • Recommended Equal-i-zer 4-Point System For A Trailer With About 900 lbs TW
    Hello Brian, thanks for reaching out. The Equal-i-zer 4-point system is a great choice. This is one of the best, if not THE best weight distribution hitch on the market. For your trailer I recommend the following: - Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 12,000 lbs GTW, 1,200 lbs TW # EQ37120ET This system will work on trailers with a tongue weight between 800 and 1200 lbs. So your trailer will be right within that range to where you will see very effective sway...
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  • Does a Weight Distribution System Decrease Tongue Weight
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    view full answer...


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