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Reese Steadi-Flex Weight Distribution System w/ Sway Control - Trunnion - 10K GTW, 1K TW
Reese

Reese Steadi-Flex Weight Distribution System w/ Sway Control - Trunnion - 10K GTW, 1K TW

Part Number: RP66559
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$755.36
Retail:$1,056.25
You Save: $300.89
Weight Distribution Hitch
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Friction in brackets and in head works to prevent and correct trailer sway. Chainless brackets with automotive-style friction pads hold spring bars firmly in place to help keep trailer in line with your tow vehicle. Adjustable shank included. Great Prices for the best weight distribution hitch from Reese. Reese Steadi-Flex Weight Distribution System w/ Sway Control - Trunnion - 10K GTW, 1K TW part number RP66559 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Reese Weight Distribution Hitch - RP66559

  • 600 lbs
  • 700 lbs
  • 800 lbs
  • 900 lbs
  • Fits 2 Inch Hitch
  • WD With Sway Control
  • Allows Backing Up
  • Reese
  • Includes Shank
  • Some Sway
  • Electric Brake Compatible
  • Surge Brake Compatible

Friction in brackets and in head works to prevent and correct trailer sway. Chainless brackets with automotive-style friction pads hold spring bars firmly in place to help keep trailer in line with your tow vehicle. Adjustable shank included.


Features:

  • Evenly distributes weight over axles of tow vehicle and trailer for stability and control
    • Creates a more level ride for both tow vehicle and trailer
  • Integrated sway control limits side-to-side movement of trailer
    • Brackets keep spring bars in place for a rigid system that holds your trailer in line
      • No lift chains - eliminates unwanted movement of spring bars
      • Automotive-grade friction material lines brackets to help correct any sway that may occur due to winds, curvy roads, or sudden maneuvers
    • System head provides frictional resistance to limit movement of spring bars
  • Trunnion spring bars are hot rolled and tapered for superior strength and flexibility
    • Bars flex appropriately over uneven terrain for a controlled, even ride
  • Desired tilt is easily achieved using preset positions on system head - no more piling on washer after washer
  • No-drill, clamp-on brackets can adjust along the trailer frame to accommodate frame-mounted items such as gas tanks, toolboxes or generators
  • Included lift handle eases installation by reducing lifting required by trailer jack
  • Corrosion-resistant powder coat is long-lasting
  • System includes head assembly, adjustable shank, trunnion spring bars, sway control brackets, lift handle, pin and clip, and all necessary hardware
    • Hitch ball sold separately - requires 1-1/4" diameter shank


Specs:

  • Tongue weight: 500 lbs - 1,000 lbs
  • Gross towing weight: 10,000 lbs
  • Fits: 2" x 2" trailer hitch receivers rated for use with weight distribution systems
  • Maximum trailer frame height: 6"
  • Sway control bracket positioning: 27" - 32" back from center of coupler
  • Shank length:
    • 8-3/4" From center of hitch pin hole to center of adjustment holes
    • 9-3/4" From center of hitch pin hole to front of shank
    • 8" From center of hitch pin hole to back of shank
    • 13" Overall
  • Total height adjustment along shank: 8-3/4"
    • Maximum rise: 8-3/4"
    • Maximum drop: 4"
    • Overall height: 10"
    • Holes are spaced 1-1/4" apart on center
  • Limited lifetime warranty


Included w/ SystemRequired - Sold SeparatelyOptional Add-Ons
  • Adjustable Shank
  • System Head
  • 2 Sway Control Brackets
  • 2 Spring Bars
  • Lift Bar
  • Hitch Pin and Clip
  • Necessary Installation Hardware
  • Hitch Ball w/ 1-1/4" Diameter Shank
n/a

Weight Distributing Hitch

Create a 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.


Integrated Dependent Sway Control

The Steadi-Flex weight distribution system works to stop trailer sway before it begins. This is achieved in 2 ways. First, the system head is designed to firmly hold the spring bars in place to provide tight resistance and help ensure that your trailer tracks behind your vehicle. Second, the spring bar brackets that mount on your trailer's frame produce friction with the bars whenever any side-to-side motion occurs. This keeps the bars from moving, also helping to hold your trailer in a straight line.


System Head with Steel-on-Steel Friction

System Head

The head of the Steadi-Flex system firmly holds the spring bars in place at the hitch point. This tight hold helps to keep the bars from moving, which in turn helps to ensure that the trailer is held firmly in place behind your vehicle. If any sway or side-to-side movement does occur, the spring bars will move only slightly inside of the system's head. This steel-on-steel contact produces frictional resistance to limit further side-to-side motion of the bars, limiting the motion of your trailer in the process. The Steadi-Flex head is wider than most weight distribution heads. This design allows for greater surface area for the spring bars to move against. This makes it easier to produce the friction that resists sway.


Sway Control Brackets with Automotive-Grade Friction Material

Friction Material Brackets

The spring bars attach to the trailer frame with fixed, sturdy steel brackets. They sit on top of the brackets instead of being suspended by chains like the bars that are on traditional weight distribution systems. Chain suspensions typically allow a good deal of side-to-side play in the system. Because the Steadi-Flex has brackets in place of chains, that unwanted movement of the spring bars is eliminated. This helps to keep your trailer in line behind your vehicle. In addition, these brackets create friction to limit any side-to-side movement that may occur. When each spring bar on the Steadi-Flex system moves within the bracket, it rubs along the surface of the bracket, creating friction. This resistance limits the movement of the spring bar, thus preventing further side-to-side movement of the trailer.


Friction Material

Most systems with sway control brackets use bare steel brackets to create friction with the steel bars. Steel-on-steel friction typically causes a much louder ride, and it can result in wear and tear on the brackets themselves. The Steadi-Flex brackets, on the other hand, are lined with automotive-grade friction material. This material is more abrasive than bare steel, which allows more friction to build up faster and easier. The long-lasting friction material also reduces the banging noise created by the bars hitting the inside of the steel brackets. This provides a quieter ride while towing.


Fast, Easy Installation

The Steadi-Flex system is easy to install and set up. On the trailer side, simply clamp the spring bar brackets around your trailer's frame. Then prepare your vehicle by sliding the included shank into your 2" x 2" hitch receiver, and bolt on the head. The system head can be easily adjusted to achieve the proper angle and optimum leverage for your specific setup. No drilling is required to install this weight distribution system.


Head Tilt Adjustment

Head Adjustment

The head of the Steadi-Flex can be easily adjusted for the best possible angle for your towing setup. Adjusting the head lets you fine-tune the system's leverage so that you can get the best distribution of weight possible. Traditional head tilt adjustment methods require that the head be disassembled so that stackable washers inside the head can be either removed or added on. But with the Steadi-Flex, there are external, toothed washers on either side of the head that make it easy to change the tilt. Simply position the head in one of the preset angles based on your hitch's tongue weight, then bolt it in place, tightening the washers as you do so. Once the head is sitting at the correct angle, tighten the internal adjustment bolt to secure the platform in place.


Tapered Spring Bars

Spring Bars

The spring bars of the Steadi-Flex system slide into the weight distribution head for quick, easy installation. With a tapered design and hot rolled steel construction, these bars offer superior flex to evenly distribute the weight between your tow vehicle and your trailer.


The bars easily pin into place inside the system head - no need to torque or re-torque any trunnion bolts to adjust the tension. With fewer parts to manage, installing and maintaining the Steadi-Flex is simple.


Adjustable, Clamp-On Brackets

The spring bar brackets simply clamp around your trailer's frame - no drilling required. These brackets are designed to be positioned 27" to 32" back from your coupler and they can fit a wide range of frame sizes and can even be used on a trailer with a bottom-mounted coupler.


Adjustable Brackets

While other brackets use L-pins to secure the spring bars in place on the brackets, the hinged Steadi-Flex brackets close completely around the spring bars. As a result, you can have greater piece of mind knowing that the spring bars are secure, all without the hassle of using and possibly losing L-pins and any extra hardware.



66559 Reese Steady Flex Heavy Duty Weight Distribution System with Sway Control - 10,000 lbs GTW, 1,000 lbs TW

Installation Details RP66559 Installation instructions


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Customer Reviews

Reese Steadi-Flex Weight Distribution System w/ Sway Control - Trunnion - 10K GTW, 1K TW - RP66559

Average Customer Rating:  4.7 out of 5 stars   (231 Customer Reviews)

Friction in brackets and in head works to prevent and correct trailer sway. Chainless brackets with automotive-style friction pads hold spring bars firmly in place to help keep trailer in line with your tow vehicle. Adjustable shank included.

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Just as I expected.



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Fast delivery and good quality products.



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Awesome product variety and great communication! Will shop here again



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Placed my order on Wednesday and Received it on Friday. And everything seems to be just as expected. Thanks



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Delivered on time and quality seems good. Thank you



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Delivered very fast. Great price and great customer service. Will definitely be buying again



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Works well



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exact what i ordered very good quality heavy duty,fast shipment thank you



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works great!!!love it



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Tows great. No sway.



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Easy to put together, works great on my camper.



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Great product, easy install. Fast shipping, thanks


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Show More Reviews

See what our Experts say about this Reese Weight Distribution Hitch

  • Replacement Friction Pads for the Reese Stedi-Flex Weight Distribution System
    The Reese Steadi-Flex Weight Distribution System w/ Sway Control - Trunnion - 10K GTW, 1K TW # RP66559 utilizes friction pads that will eventually wear down as you stated. It will take a long time for these pads to require replacing, but the Replacement Friction Pad Kit for Reese Steadi-Flex Weight Distribution Systems # RP58527 are available and easy to replace with a simple screw and nut.
    view full answer...
  • Is It Okay To Use the Reese 12K Steadi-Flex On a Trailer Under 12K
    Yes, you can use a weight distribution system that is overrated for the trailer you intend to use it with. However, the best performance will come from a system that matches the total tongue weight of your towing setup. In order to find the total tongue weight of your towing setup you will need to calculate the loaded ready to tow tongue weight of the trailer plus the weight of any cargo stored behind the rear axle of the tow vehicle. The Reese Steadi-Flex Weight Distribution System part...
    view full answer...
  • Weight Distribution System Recommendation for Trailer With Dry Tongue Weight of 788 lbs
    The best way to pick out a weight distribution system is to base it off of the loaded tongue weight of the setup when it is loaded and ready to tow. This figure also includes the weight of any cargo behind the rear axle of the tow vehicle. I attached a help article on determining tongue weight for you to check out as well. You will want the loaded tongue weight of your setup to fall right in the middle of the tongue weight range of the system you use. Based on your dry tongue weight being...
    view full answer...
  • Should Tongue Weight be Measured When Choosing Weight Distribution
    I definitely recommend finding your trailer's tongue weight when choosing a weight distribution system. You need to have the trailer loaded like it will be when you're towing it, and you also need to add in any weight you put behind the rear axle of the tow vehicle because this counts as tongue weight when it comes to weight distribution. You want a weight distribution system that has a tongue weight range that covers the tongue weight once you have that figured out. The closer to the...
    view full answer...
  • Recommended Trailer Hitch Receiver, Wiring, and Weight Distribution for 2013 Nissan Armada 4x4
    For your 2013 Nissan Armada, I recommend the Curt Trailer Hitch Receiver # 13188. This will be able to tow your trailer with 1 horse without weight distribution, but you will most likely need the weight distribution system for 2 or 3 horses. It will also help with sway control, so I would use it no matter the number of horses. For your wiring, if you don't have the factory 7 way, I recommend the Vehicle Wiring Harness Kit with 4 Pole Trailer Connector # C59236 along with the # ETBC7...
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  • Recommendation for Towing a Trailer with a Hitch Extension
    The Curt Trailer Hitch Receiver - Custom Fit - Class V Commercial Duty - 2-1/2" # C15809 is a great option for your 2011 Ram 2500 as long as you are okay with a 24 inch hitch extension like # C45048. This will give you a gross trailer weight of 8,000 lbs when used with weight distribution, so a weight distribution system would be required. Your other option is to use the TorkLift SuperHitch Original Trailer Hitch Receiver - Custom Fit - Class V - Dual 2" Receivers # TLD1102 instead...
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  • Solution for Needing Curt TruTrack C17499 with More Drop from Shank
    The Curt TruTrack part # C17499 that you referenced is not available without a shank so you'd need to also go with the shank part # 17120 which would provide the drop you'd need. We also don't carry a similar rated system without a shank but we do have the Reese Steadi Flex part # RP66559 which has a tongue weight range of 500 to 1,000 lbs and comes with a shank that can do 4 inches of drop.
    view full answer...
  • Weight Distribution and Sway Control for a 2006 Lexus GX470 Towing a Featherlite Open Car Trailer
    I recommend Reese Steadi-Flex Weight Distribution system, part # RP66559, if the tongue weight of your trailer will always be less than 1,000 lbs fully loaded and ready to travel. The Steadi-Flex will help to control sway and will reduce the stress on the vehicle auto-leveling system. You will need a properly sized hitch ball to complete your installation, the compatible hitch balls we offer can be seen at the link below.
    view full answer...
  • Recommended Weight Distribution System, Solenoid and Power Inverter for Auxiliary Battery
    For your auxiliary battery in your Ford truck, I recommend using the Battery Isolation Solenoid # PK5231201. This will make sure your auxiliary battery does not drain your vehicle starter battery to ensure you will always be able to start your vehicle even if your trailer battery and auxiliary truck battery are drained. This will allow you to maintenance charge your auxiliary battery from your alternator when the vehicle ignition is turned on, but not when it is turned off. You won't...
    view full answer...
  • Is Reese Steadi-Flex or Dual Cam II a Better Weight Distribution for a 2023 Forest River Alpha Wolf
    Thanks for all of the info, Scott! I highly recommend going with the 12K Reese Dual Cam II Weight Distribution System w/Active Sway Control # RP75FR over the 10K Reese Steadi-Flex Weight Distribution System w/ Sway Control # RP66559. Even though it might seem like overkill, the number we are more concerned with is the tongue weight range of the system as opposed to the gross towing weight - and the 12K system will include your 900 lb tongue weight so you'll still be good to go! With the...
    view full answer...
  • Pole Tongue Adapter to Use Reese Steadi-Flex Weight Distribution on a Boat Trailer
    I spoke with my contact at Reese and confirmed that you can use Reese Pole-Tongue Adapter for Weight Distribution Systems - 14,000 lbs GTW, 1,400 lbs TW Item # RP58393 with the Reese Steadi-Flex Weight Distribution System w/ Sway Control - Trunnion - 10K GTW, 1K TW Item # RP66559. So that pole tongue adapter is the only part you would need use the system with your pole tongue trailer.
    view full answer...
  • Weight Distribution System Compatibility with 2013 Ram 1500 4 Corner Air Suspension Auto Leveling
    The Reese Steadi-Flex Weight Distribution System w/ Sway Control # RP66559 will not be effected by the air suspension in your 2013 Ram 1500. That air suspension levels the bed of your truck for more comfortable travel, but the weight distribution and sway control of this system will only increase the smoothness of that ride. It is rated for a total tongue weight (loaded trailer tongue weight along with any cargo behind the rear axle of your truck) of between 500 and 1000 lbs. This...
    view full answer...
  • Is there a Downside to Using Over-Capacity Weight Distribution System on 7000 lb Trailer?
    The Reese Steadi-Flex Weight Distribution System w/ Sway Control - Trunnion - 10K GTW, 1K TW # RP66559 is rated for a total tongue range between 500 and 1,000 lbs. That total tongue weight is the loaded tongue weight of the trailer plus any cargo behind the rear axle. Based on the information you gave, I recommend going with # RP66560 which is rated for total tongue weights between 600 and 1200 lbs. This ensures you will be within the range without going over. Ideally you want to...
    view full answer...
  • Will Curt Hitch Ball # A-6 Work on Reese Steadi-Flex Weight Distribution System RP66559
    Yes, the Reese Steadi-Flex weight distribution system part # RP66559 that you referenced takes a hitch ball with a 1-1/4 inch diameter shank that is 2-5/8 inches long just like the part # A-6 so it would work well. Also this has the same 10k capacity as the Steadi-Flex.
    view full answer...
  • Recommended Weight Distribution System for 7,800 Pound Tritoon Boat Trailer
    It sounds like you have things pretty well figured out. The Reese Pole-Tongue Adapter for Weight Distribution Systems # RP58393 is the perfect solution for adding weight distribution to a pole-tongue trailer like yours. It won't matter if you mount it on top or below the trailer tongue, it can handle your 7,800 lb trailer. The Reese Steadi-Flex Weight Distribution System w/ Sway Control # RP66559 is also compatible with this adapter. This weight distribution system is a great choice and...
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  • Upgrade Recommendation For A Reese SC Weight Distribution System With Sway Control
    I believe the part you're referencing to on your Reese SC Weight Distribution System w Sway Control # RP66153 is the pad hanger, however this part along with the Reese SC WDS has been discontinued from the manufacturer. Alternatively, if you're interested in an upgrade, the Reese Steadi-Flex Weight Distribution System w/ Sway Control # RP66559 is an excellent choice. This system has a maximum gross towing weight of 10,000lbs, a tongue weight range of 500-1,000lbs, which is similar to...
    view full answer...
    Image 1 for
  • Pole-Tongue Adapter for Reese Steadi-Flex Weight Distribution Systems
    We do carry the Reese Pole-Tongue Adapter for Weight Distribution Systems, part # RP58393, that will fit the Reese Steadi-Flex Weight Distribution System, part # RP66559. This system will install on your trailer tongue and allow you to mount a Reese round-bar, trunnion-bar, and Steadi-Flex weight distribution systems. When mounted on the top of the trailer tongue the towing weight capacity is 14,000 lbs, and when mounted below the tongue the towing weight capacity is 12,000 lbs. For more...
    view full answer...
  • Recommendation on a Weight Distribution System for a Pop Up Trailer and a 2006 Dodge Durango
    When trying to decide on a proper weight distribution (WD) system for your towing rig, you will need to know the total tongue weight (TTW) of your set-up. The total tongue weight will be a fully loaded ready to tow trailer, plus any weight located behind the rear axle of your 2006 Dodge Durango. You want to use a system where your total tongue weight will fall in between the WD system's tongue weight range. I have attached an article that will explain how to find the TTW of your towing...
    view full answer...
  • Replacement For Older Reese SC Weight Distribution System
    We do still carry the replacement brake pads for the Reese SC as part # 58512, however Reese no longer offers the outer link plates or any other replacement parts for the Reese SC system as it was discontinued in 2018. Other than the brake pads, any other replacement parts they once offered are long gone. If you need to replace your current system, Reese replaced it with the Steadi-Flex, available for 5 different trailer tongue weight ranges. -For fully loaded trailer tongue weights...
    view full answer...
  • Recommended Weight Distribution System for Trailer w/ 630lb Fully Loaded Tongue Weight
    To properly choose a weight distribution system, the first step is to determine the fully loaded and ready to tow tongue weight of your trailer. To that figure, add the weight of any gear stowed in the truck bed behind the rear axle. I've linked to an FAQ article that explains how to do this. These combined figures represent the Total Tongue Weight (TTW) of your set-up. The TTW of your trailer should fall as close as possible to the middle of the effective range of the weight distribution...
    view full answer...
  • Recommended 2" Hitch Ball for Reese Steadi-Flex Weight Distribution System
    The correct 2" hitch ball to use with a Reese Steadi-Flex Weight Distribution System like part # RP66559 is part # C69FR. This hitch ball is made of stainless steel which is best because you don't have to worry about the coating wearing off and rusting like you do for chrome plated hitch balls.
    view full answer...
  • Size Bolts that Secure Head of Reese Steadi Flex to Shank
    Your best option honestly is going to be to a local hardware store and tell them the size bolts you need. They are going to have them in stock and you'll be on your way. We can't really get just the bolts from Reese so it wouldn't be a great idea to try and get them from us. The size is 3/4-10X5 and 3/4-10X4 like you mentioned.
    view full answer...
  • Best Weight Distribution and Sway Control Option for 1998 Durango
    Typically, we figure trailer tongue weight as being from 10 to 15 percent of the weight of the fully loaded trailer. You have provided me with the weight of the items placed on the trailer, but not the weight of the trailer itself. When figuring tongue weight, the weight of any items placed behind the rear axle in the tow vehicle must be considered as well. We have an online page that shows how to determine the tongue weight of the trailer using a length of pipe, some scrap lumber and...
    view full answer...
  • Recommended Weight Distribution for a Trailer With 450 lbs TW Dry and 1,000 lbs TW Loaded
    When looking into Weight Distribution (WD) systems you want to find one that has a range that your Total Tongue Weight (TTW) falls in the middle of. Your TTW can be found by adding the Tongue Weight (TW) of your fully loaded and ready-to-go trailer along with the weight of any cargo that sits behind the rear axle of your tow vehicle. Since the Reese Steadi-Flex # RP66559 that you referenced has a weight range of 500- 1,000 lbs it will be a little too stiff when you do not have your car...
    view full answer...


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