1. Weight Distribution Hitch
  2. Equal-i-zer
  3. 1600 lbs
  4. WD With Sway Control
  5. Fits 2-1/2 Inch Hitch
  6. Prevents Sway
Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 16,000 lbs GTW, 1,600 lbs TW

Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 16,000 lbs GTW, 1,600 lbs TW

Item # EQ90-00-1600
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Weight Distribution Hitch
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Shipping Weight: 140 lbs
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Is this right for you? Product Expert Lindsey S says:

Yes, if you:

  • Need heavy-duty sway control that keeps your trailer firmly in line
  • Want an American-made system that lasts from an industry-leading brand
  • Have a big truck with a 2-1/2" receiver and tow a trailer with 1,200 lbs – 1,600 lbs of tongue weight

No, if you:

  • Hate noise - the steel on steel brackets can create a racket, especially during turns
  • Might be switching to a lighter trailer and would want to transfer your hitch to it
Steel-on-steel friction works to prevent and correct trailer sway in this unique weight distribution system. Sway control brackets ensure that your trailer stays in line with your tow vehicle. Adjustable shank included. Lowest Prices for the best weight distribution hitch from Equal-i-zer. Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 16,000 lbs GTW, 1,600 lbs TW part number EQ90-00-1600 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (1)
  • Q & A (11)
  • Photos
  • Why etrailer?

Equal-i-zer Weight Distribution Hitch - EQ90-00-1600

  • 1600 lbs
  • WD With Sway Control
  • Equal-i-zer
  • Fits 2-1/2 Inch Hitch
  • Prevents Sway
  • Includes Shank
  • 4-Point
  • Surge Brake Compatible

Steel-on-steel friction works to prevent and correct trailer sway in this unique weight distribution system. Sway control brackets ensure that your trailer stays in line with your tow vehicle. Adjustable shank included.


  • Evenly distributes weight over axles of tow vehicle and trailer for stability and control
    • Creates a level ride for both tow vehicle and trailer
  • Integrated 4-Point Sway Control limits side-to-side movement
    • Brackets keep spring bars in place for a rigid system that holds trailer in line
    • No lift chains - eliminate unwanted movement
    • Steel-on-steel friction helps to minimize sway caused by winds or sudden maneuvers
  • Unique design makes system compatible with surge-type brake actuators
  • Spring bars flex for a controlled, even ride
    • Constructed of chromoly steel for superior dexterity and spring
  • No-drill, clamp-on brackets can be adjusted along the trailer frame
    • Accommodates frame-mounted items such as gas tanks, battery boxes, toolboxes, or generators
  • Desired tilt is achieved with traditional washer design
    • Add or remove washers from spacer rivet to tilt head up or down
  • Dipped steel construction is durable and corrosion resistant
  • Snap-up lever eases installation by reducing lifting required by trailer jack
  • System includes head assembly, adjustable shank, spring bars, sway control brackets, 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


  • Tongue weight: 1,200 lbs - 1,600 lbs
  • Gross towing weight: 16,000 lbs
  • Ball size: 2-5/16" (sold separately)
  • Fits: 2-1/2" x 2-1/2" trailer hitch receivers rated for use with weight distribution systems
  • Sway control bracket positioning: 27" - 32" back from center of coupler
  • Maximum trailer frame height: 8"
  • 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: 6"
    • 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


Included w/ SystemRequired - Sold SeparatelyOptional Add-Ons

90-00-1600 Equal-i-zer Weight Distribution Hitch

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

Weight Distribution Diagram

Create a more stable ride for your tow vehicle and trailer with a weight distribution hitch. Adding spring bars to your towing system applies leverage, which transfers the load that is pushing down on the rear of your vehicle to all the axles on both your tow vehicle and your trailer, resulting in an even distribution of weight throughout. The result is a smooth, level ride, as well as the ability to tow the maximum capacity of your hitch.

Selecting a Weight Distribution System

The tongue weight rating is the most important factor in determining which size weight distribution system you should use. If the bars of the system you choose are rated too high for your setup, they will create a rigid ride, which can result in a bouncing trailer. If, on the other hand, the bars are not rated high enough, the system will be unable to properly distribute the weight, rendering it virtually useless.

To determine the proper weight rating for a weight distribution system, you must first determine your trailer's tongue weight. Then add to that the weight of the cargo behind the rear axle of your tow vehicle. These two measurements make up the tongue weight rating for a weight distribution system.

Features of the Equal-i-zer

Head Tilt Adjustment

Controlling head tilt with traditional washer method

The Equal-i-zer weight distribution system uses the traditional washer-style adjustment method to achieve the perfect tilt. Controlling the head tilt helps you to fine-tune the leverage on your entire system, making it easier to install and hook up the spring bars. To adjust the tilt, simply slide washers onto the spacer rivet and insert the rivet into the head assembly. To increase the angle, add a washer. To reduce the angle, remove a washer. Most setups take four to six washers to achieve the proper height. Once you get the desired tilt, insert the shank bolts to secure the head to the shank and then tighten it in place.

Construction of Spring Arms

The Equal-i-zer spring bars are not made of traditional spring steel. Rather, they are constructed of a chromium-molybdenum alloy steel. Chromoly steel has a high tensile strength for extreme durability. It also features excellent dexterity, which allows it to give as required and then return softly back to its original form. This pliability is important in minimizing trailer bounce while still ensuring that the weight of your rig is adequately distributed.

Fixed Sway Control Brackets

Installation of Sway-Control Brackets

The unique sway control brackets of the Equal-i-zer are easy to install and simple to use. They clamp onto your trailer frame and conveniently adjust to a position anywhere between 27 inches and 32 inches back from the coupler. These brackets provide the attachment points for the weight distribution spring bars. To position the spring bars during hookup, simply use the included snap-up lever to lift each bar into place on the L-shaped brackets. Then secure the bars in place with the included L-pins and clips.

Equal-i-zer Hitch 4-Point Sway Control

The Equal-i-zer weight distribution system works to stop trailer sway before it begins. This is achieved through the rotational friction that is present in the weight distribution hitch itself. Within the system head, the downward pressure that is placed on the hitch ball by the trailer is combatted by the upward pressure exerted by the spring bars that are mounted in the sockets. This upward force is placed on the spring bars on either side of the system, creating the rotational friction that, essentially, forces your trailer in line. This type of friction is responsible for two points - one on either side of the trailer - of the 4-Point Sway Control. To ensure that enough tension is present, make certain that the socket bolts in the head assembly are torqued to at least 45 foot-pounds.

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

The other two points of sway control are created by the steel-on-steel friction that occurs when the spring bars slide within the L-brackets that are mounted on the trailer tongue. Most traditional weight distribution systems have spring bars that are suspended by chains. Although this ensures that the system is not so rigid as to create bounce in the trailer, it also allows a good deal of side-to-side play in the system. Letting the spring bars hang freely minimizes the rotational friction described earlier. It also eliminates your system's ability to create the type of direct friction that has been shown to be so effective in limiting trailer sway.

This direct friction that is applied to the spring bars in the Equal-i-zer system helps to stop sway once it has begun. The concept is similar to the way in which an add-on friction sway control device functions. When each spring bar moves forward or backward, or side to side, it rubs along the bracket, creating friction. The resistance created by this action limits the movement of the spring bar, thus preventing further side-to-side movement of the trailer.

Most add-on units feature some sort of friction material similar to that used in automotive brakes. But the Equal-i-zer uses direct steel-on-steel contact to create resistance. This is the same sort of friction that is used with locomotives that pull loaded railcars weighing tons. No additional materials are needed. The steel will outlast any of those other materials, providing an extremely durable, functional sway control system.

EQ90-00-1600 Equalizer Weight Distribution Hitch with Adjustable Shank - 16K

Customer Reviews

Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 16,000 lbs GTW, 1,600 lbs TW - EQ90-00-1600

Average Customer Rating:  5.0 out of 5 stars   (1 Customer Reviews)

Steel-on-steel friction works to prevent and correct trailer sway in this unique weight distribution system. Sway control brackets ensure that your trailer stays in line with your tow vehicle. Adjustable shank included.

- EQ90-00-1600

Fast Delivery 727247


Ask the Experts about this Equal-i-zer Weight Distribution Hitch

  • Weight Distribution and Sway Control Recommendation 2018 Jayco Eagle 322RLOK
    The best weight distribution/sway control systems are the Equal-i-zers like the part # EQ90-00-1600 you mentioned but the trick is picking out a kit that the trailer's loaded tongue weight falls right into the middle of. This system has a tongue weight range of 1,200 - 1,600 lbs. I looked up your 2018 Jayco Eagle 322RLOK and based on the dry weight, dry tongue weight, and GVWR this would be a great option rated perfectly. For a hitch ball you'd then want the part # C40008 and the socket...
    view full answer...
  • Which is Better Weight Distribution System Reese Strait Line or Equal-i-zer
    The Equal-i-zer weight distribution systems and the Reese Strait Line systems are widely considered to be the best two systems you can get. The sway control of the Strait Line setup is better than the Equal-i-zer, but the Equal-i-zer weight distribution has yet to be improved upon so it has the edge. So if you are wanting the best WD the Equal-i-zer is the way to go but if you want the best sway control the Strait Line is the way to go. Since you haven't had issues with sway I'd go...
    view full answer...
  • Which Equal-i-zer Weight Distribution for 8000 lb GVWR Travel Trailer
    Since tongue weight is approximately 10 to 15% of the trailer's fully loaded and ready to tow weight, let's start out with the premise that your Imagine 2500 RL has a tongue weight between 800 and 1100 lbs. In that case, I can highly recommend the Equal-i-zer # EQ37121ET which is specifically designed for trailers with a tongue weight between 800 and 1200 lbs (make sure you include cargo stowed in the truck bed behind the rear axle as tongue weight). The system includes the 2-5/16 inch...
    view full answer...
  • Recommended Weight Distribution System for 13,500 Toy Hauler
    If your tongue weight is between 1500 and 2000 lbs (which it should be, given the 13.5K weight of your toy hauler), the Blue Ox # BXW2000 would be perfect for you. The system includes a shank that would provide up to 2 inches of drop, and combines weight distribution with sway control which is really needed for a long towable like your toy hauler. The trailer ball, # 19286 is sold separately. The Equal-i-zer # EQ90-00-1600 you'd looked at is a great product, but it wouldn't have enough...
    view full answer...
  • What Weight Distribution System do you Recommend for my Ford F-350 Crew Cab Hauling 12,000 lbs
    You can't go wrong with the Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 16,000 lbs GTW, 1,600 lbs TW part # EQ90-00-1600. It offers the best user experience and is among the best at eliminating sway as you head down the road. You will need the 2-5/16" Hitch Ball part # C40008 and the Thin Walled Socket for Equal-i-zer Hitches part # EQ70-00-4800 to install the ball. These three components are all you need to get the set up installed
    view full answer...
  • What Weight Range Weight Distribution for Trailer with 1,400 lbs Tongue Weight
    If you have a tongue weight of 1,400 lbs a weight distribution with a higher tongue weight range would be ideal. Especially when you consider that the weight of any cargo behind the rear axle of the tow vehicle gets added as additional tongue weight. So a higher rated system like the Equal-i-zer part # EQ90-00-1600 would be your best option as it has a tongue weight range of 1,200-1,600 lbs. You'll also need a thin-walled socket to install the ball # C40008 too with the # ALL643216.
    view full answer...
  • Recommended Weight Distribution for Trailer With 1600 lbs of Tongue Weight
    Whew. That's one heavy trailer! As long as the trailer tongue weight won't exceed 1600 lbs, the # EQ90-00-1600 Equal-i-zer Weight Distribution System would be ideal. This particular system is meant to be used in a Class V hitch with a 2-1/2 inch by 2-1/2 inch receiver. This is the highest rated system Equal-i-zer offers. If your trailer's tongue weight will exceed 1600 lbs, the next step up is the Reese # RP66075 Strait-Line, good for up to 1700 lbs of tongue weight. The sway control component...
    view full answer...
  • Most Amount of Drop That Can Be Had with Equal-i-zer Weight Distribution System for 2-1/2 Inch Hitch
    The most amount of drop we offer in a weight distribution shank with 2-1/2" stinger is 8", the Curt Weight Distribution Shank part # C17132 which can be used with an Equal-i-zer Weight Distribution System like part # EQ37141ET. If you need a higher capacity, the Equal-i-zer Weight Distribution System part # EQ90-00-1600 is available but not without the shank so you would just have to swap them out. Please note, rise/drop is measured from the ground to the top inside edge of the receiver...
    view full answer...
  • Recommended Weight Distribution System For a 2019 Airstream Classic 33FB
    The weight distribution system I recommend for a 2019 Airstream Classic 33FB is the Equal-i-zer Weight Distribution System part # EQ90-00-1600 which is rated for up to 16,000 lbs. The Equal-i-zer Weight Distribution System will perform better than the Blue Ox SwayPro Weight Distribution System part# BXW2000 and is more appropriately rated for the weight of your trailer. Please note, the Airstream Classic 33FB has an overslung coupler hence part # BXW2000 and not part # BXW2003. If you...
    view full answer...
  • Recommended Weight Distribution System for 10,000 lb Enclosed Car Hauler
    The best way to find out the necessary weight rating of the weight distribution system you need is to determine the as-towed tongue weight of the trailer. A tongue weight scale like # 5780 would come in handy for said purpose. This weight should also include the weight of anything stowed in the truck bed behind the rear axle. I'll link to an article that explains how to do this. Because your SuperHitch has a 2-1/2 inch receiver, your system will need to have a compatible shank. For...
    view full answer...
  • Replacement Parts for Reese SC Weight Distribution System
    We offered those replacement parts at one time, but unfortunately, Reese discontinued the Reese SC in 2018, and any stock they had of replacement parts has long since been cleared out. Reese's replacment for the SC is the Steadi-Flex. The highest rated Steadi-Flex is part # RP66561, which is good for trailer tongue weights ranging from 700-1400 lbs. If you were needing a higher capacity, Equal-i-zer offers the # EQ90-00-1600, which has a 1200-1600 lb tongue weight cpacity.
    view full answer...

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Info for this part was:

Expert Research:
Mike L
Expert Research:
Jameson C
Edited by:
Tyler C
Updated by:
Lindsey S
Installed by:
Kathleen M
Written by:
Mike S

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