1. Weight Distribution Hitch
  2. Reese
  3. 100 lbs
  4. 200 lbs
  5. 300 lbs
  6. WD With Sway Control
Reese Steadi-Flex Weight Distribution System w/ Sway Control - Trunnion - 4K GTW, 400 TW

Reese Steadi-Flex Weight Distribution System w/ Sway Control - Trunnion - 4K GTW, 400 TW

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Weight Distribution Hitch
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Weight Distribution Hitch 66557 - Reduces Sway - Reese
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Is this right for you? Product Expert Lindsey S says:

Yes, if you:

  • Friction material makes for quieter towing than systems with plain steel brackets
  • Easy-to-adjust head makes setup simple

No, if you:

  • Friction blocks can loosen up over time, and eventually the material will wear
  • You need to buy the hitch ball separately
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. Lowest Prices for the best weight distribution hitch from Reese. Reese Steadi-Flex Weight Distribution System w/ Sway Control - Trunnion - 4K GTW, 400 TW part number 66557 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (146)
  • Q & A (159)
  • Videos (2)
  • Photos
  • Why etrailer?

Reese Weight Distribution Hitch

  • 100 lbs
  • 200 lbs
  • 300 lbs
  • WD With Sway Control
  • Reese
  • Reduces Sway
  • Fits 2 Inch Hitch
  • Allows Backing Up
  • Includes Shank
  • 4-Point
  • 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.


  • 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 head tilt is achieved with traditional washer design
    • Add or remove washers from spacer rivet to tilt head up or down
  • 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
  • Steel shank has corrosion-resistant powder coat
  • 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" diameter shank


  • Tongue weight: 250 lbs - 400 lbs
  • Gross towing weight: 4,000 lbs
  • Fits: 2" x 2" trailer hitch receivers rated for use with weight distribution systems
  • Maximum trailer frame height: 6"
  • Maximum trailer frame width: 1-3/4"
  • Sway control bracket positioning: 25" - 32" back from center of coupler
  • Shank length:
    • 7-3/4" From center of hitch pin hole to center of adjustment holes
    • 8-3/4" From center of hitch pin hole to front of shank
    • 6-3/4" From center of hitch pin hole to back of shank
    • 12" Overall
  • Total height adjustment along shank: 8-3/4"
    • Maximum rise: 7-1/2"
    • Maximum drop: 2-3/4"
    • 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" Diameter Shank

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.

The flat spring bars of this system slide into the weight-distribution head for quick, easy installation. These bars offer superior flex, ensuring a smooth, controlled ride for both your tow vehicle and your trailer.

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.

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

The Steadi-Flex system uses the traditional washer-style adjustment method to achieve the perfect tilt. Controlling the head tilt helps you to fine-tune the leverage and maximize the amount of tension in the whole system. To adjust the tilt, simply slide washers onto the adjustment pin and insert the pin into the head assembly. To increase the angle, add a washer. To reduce the angle, remove a washer.

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

Adjustable 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.

While other brackets use relatively thin L-pins to secure the spring bars in place on the brackets, the Steadi-Flex system uses steel pieces that are almost as wide as the brackets themselves to secure the bars. These retention brackets easily pin into place once wrapped around the spring bars. As a result, you can have greater piece of mind knowing that the spring bars are secure and less likely to rattle around inside of the brackets.

66557 Reese Steady Flex Light Duty Weight Distribution System with Sway Control - 4,000 lbs GTW, 400 lbs TW

Replaces 66041

Item # 66557

Installation Details 66557 Installation instructions

California residents: click here

Video of Reese Steadi-Flex Weight Distribution System w/ Sway Control - Trunnion - 4K GTW, 400 TW

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Reese Light Duty Weight Distribution System Review

Today, we're going to be taking a look a the Reese Light Duty Distribution System with sway control. With a six thousand pound gross trailer weight, in a six hundred pound tongue weight, part number RP66558. It's also available in a four thousand pound gross trailer weight and a four hundred pound tongue weight, part number 66557. You've decided you need a weight distribution system. The Reese Light Duty Weight Distribution System is perfect for an SUV and a small travel trailer set up as you see here. The sway control is going to help reduce the movement caused by wind, curving roads or sudden maneuvers. As with all weight distribution systems, it going to evenly distribute weight over both the tow vehicle and the trailer's axles.

This is going to provide a safer, more stable ride with less tire wear, better braking and handling. The spring bar hangers have integrated friction pads to help prevent sway. The hangers themselves do not take up very much space, making it perfect for smaller size trailers. It's a no drill installation with all the hardware provided. The kit even comes with weight distribution shank that you hook up with your own hitch ball.Speaker 2: As you can see with our hook up crosstalk 00:01:04 here at the rear.

crosstalk 00:01:10 raised up about an inch.crosstalk 00:01:06 In hitch ball, those require one inch diameter shank. The spring bars will flex appropriately over uneven terrain for a more controlled ride. The whole thing is coated in a black powdered coat so it's going to be corrosion resistant and it's going to stand up to the elements. Now that we've gone over some features, I'll go ahead and show how we got it set up. First thing we'll want to do is take some measurements on our vehicle.

From the ground up to underneath our wheel well, we've got 36 inches. We'll want to write that down. In the front, we've got 34-1/2 inches. These are the measurements we want to get back to when we engage our weight distribution system. For comparison, we're going to hook up our trailer without weight distribution and take those same measurements. As you can see with our trailer hooked up without weight distribution, here at the rear, we're squatting about 2-1/2, 3 inches and here at the front, we're raised up about an inch.

You can see the problem that we're having. The front of our vehicle is tilting upward. We'll want to take note of those measurements that way we have something to compare it to when we get our weight distribution hooked up. Then, when we re-engage our weight distribution and get it hooked back up, we're within a 1/4 to a 1/2 inch of our stock measurement. That's where we want to be. Now, if the front wheel height is higher than previously measured, the head tilt angle must be increased. That's tilted downward. If the front wheel well height is substantially lower than originally measured, an inch or more, the head tilt angle must be reduced. That's tilted upward. The next thing you want to do is make sure your trailer is level. The easiest way to do that is to raise or lower your tongue jack so that you have the same measurement in the front and in the back. We've got it. Keep in mind when setting up your weight distribution system, you need to make sure that your trailer is fully loaded and ready to go. The next thing we'll do is take a coupler height measurement. the reason we're going to do this is it's going to help us determine the correct ball height. We've got 22. We'll need to take note of that. We've gone ahead and swapped out our old ball mount with our new weight distribution shank. We've previously adjusted our ball height. I'll go ahead and show you how we did that. First, we got close to the desired height by selecting a mounting location for our bolts. First, to help us set the tilt of our head, we installed several of the included washers as spacers. The number of washers you will use will vary depending on your set up. Then to get the approximate height of your ball, you'll want to install your shank in the rise or drop position and then choose the desired location to put in your bolts. With the approximate ball height set and loosely installed, lets go ahead and line up our coupler with the ball. Now, with our ball attached to our coupler and our trailer back to level we can bring in our spring bars to help us determine the location of our frame brackets. We'll bring it in. You'll need to grab the pin and the clip. We're going to insert it between the head there. Drop the pin in when it's lined up and put the clip in on the bottom. Here's where it gets tricky. You want to be sure that your brackets are between 25 and 32 inches from the center of your coupler and you want to make sure that there's nothing interfering like your propane tanks or your battery box. You also need to position them so that your spring bar extends at least 3 inches beyond the bracket. With our bracket location determined, we can go ahead and install it. We'll then install our L-bracket and leave it loosely installed. We can repeat that same process for the other side. With our bracket torqued down and our L-bracket loosely installed, we'll need to be sure that our spring bar is 4 inches from the bottom of our L-bracket. That's for the six hundred pound system which is what we have here. For the four hundred pound system, it needs to be 3 inches from the bottom of the L-bracket. Now, if for some reason that didn't work out, you'll need come back to the tilt of your head and add or subtract washers. If you run out of washers, you may need to adjust the height of your L-bracket. The next thing we need to do is lock in the tilt of our head by torquing it down to the manufacturer's specifications. Now, we're ready to take our included tool and put our spring bars into place on the L-bracket. To make it easier, we can raise our tongue jack. How the tool works is it goes underneath the spring bar and hooks into the L-bracket. You want to stand off to the side to avoid injury. Because we left our L-brackets loosely installed, they have adjusted to accommodate our spring bars. Now, we can install a tension bracket to keep our spring bar in place. With that in place, we can now torque down our L-bracket bolts. With everything installed, let's go ahead and lower our jack. Once you get to your destination, in order to disconnect, you want to raise your tongue jack all the way up and this is going to make it easier to safely remove your spring bars. We can go ahead and remove our tension bracket. Now, we can just remove the spring bar from the L-bracket. We'll just repeat the same process on the other side. With our spring bars disengaged, we can go ahead and take them off. Now, we can just lower it back down, uncouple it and we've got it. That's going to complete our look at the Reese Light Duty Weight Distribution System with sway control at six thousand pounds gross trailer weight and six hundred pounds tongue weight, part number RP66558.

Customer Reviews

Reese Steadi-Flex Weight Distribution System w/ Sway Control - Trunnion - 4K GTW, 400 TW - 66557

Average Customer Rating:  4.8 out of 5 stars   (146 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.

- 66557

Works great. I tow a 3,500 lb bayside pop up camper with my 2009 Nissan Pathfinder. Without the weight distribution and sway bars the system would be unsafe to tow at freeway speeds. With the system it is solid and I have felt comfortable even on winding mountain roads. Installation was straight forward and took 1-2 hours. I would absolutely get a system like this that is backup capable. The brake pad material is holding up well after 1 year. 505033

- 66557

We are using this hitch on a 2019 Scamp 16’ Deluxe camper, and towing with a Toyota 4Runner. Just completed nearly 5000 mile trip with this hitch towing our camper, and it worked absolutely great. We previously towed the Scamp with a standard hitch and a Ford Escape, and could not get above about 58 mph without experiencing uncomfortable trailer sway; even less in a cross wind. But with this Reese 66557 hitch we regularly cruise 65+ mph with ZERO trailer sway. It handles cross winds and passing semi’s with no problem. A very worthwhile, quality product. Our Scamp has dual LP tanks and battery on the front, but there was ample room to install the brackets on the trailer A-frame well within the required distance from the ball socket. I did need to remove the LP tanks and get a torque wrench and a larger socket to complete that part of the assembly. You will also need a torque wrench and larger sockets to assemble the vehicle end of things, too. I am not a mechanic, but was able to complete the assembly per the instructions with no problems. Everything has remained tight and secure after all those miles on all sorts of roads. When hooking up the trailer we do use the special tool that comes with the hitch to lift the torsion bars up onto the friction pads. Then it just takes a few seconds to put on the small brackets and clip pins to keep the torsion bars in place and you are ready to go. Unhooking is just as easy. And removing the entire draw bar assembly from the vehicle for a day trip without the trailer takes all of a minute. Backing and tight turns in the campground are no problem with this hitch. You do not need to remove anything to maneuver. The hitch does creak and groan a little in those maneuvering situations due to the torsion bars rubbing on the friction pads. But driving down the highway there is no noise from the hitch. A quality product, well designed and manufactured, with good assembly instructions. It has enabled us to travel safely and securely at highway speeds. After nearly 5000 miles we can highly recommend this product. 766170

- 66557

Using with 2003 Toyota Sequoia and a pop-up camper which is somewhere around 2,300lb and maybe 200-300lb tongue weight. Used this for a couple long trips, and it has worked great! The longest trip was 4,300 miles, and I'm very happy that I bought it! (#66557 weight distribution and sway control system.) It feels very stable towing at higher speeds. The truck doesn't bottom out over large bumps. The sway control works great - the camper stays right behind the truck and doesn't sway back and forth when changing lanes or in a strong wind. It feels much more stable at higher speeds than before. I had to buy longer safety chains for my camper because this hitch head is longer than my old drawbar ball mount. I also upgraded the camper tires from load range C to load range D, because the weight distribution shifts more weight to the tires, and the higher load rating should help them run cooler. And don't forget to buy a ball since it doesn't come with it. The initial Installation does take a while, so make sure you leave enough time before a trip to be able to take a test drive and re-do it if the heights and angles are not quite right. After starting the long trip, I didn't re-grease the sway bar front pivot, so I can see some wear marks on the bars. So now I bought a tub of grease (Item # 58117) to keep in the trailer so I can apply grease regularly to the front pivot. 764779

- 66557

Etrailer folks very helpful in getting right parts. 655080

- 66557

Perfect solution for my tow vehicle and trailer combo. The ride is much better with no sway not even when passing tractor trailers. 617108

Still very happy with the purchase one year later. The system is made of good quality. No broken parts or damages.
Tommie C - 04/05/2020


- 66557

Yes, everything has worked out great! I attached a picture of the race car trailer hooked up to my 2011 Tahoe PPV. Made several trips this summer of at least 3 hours or more,fully loaded, and it towed perfect. The only thing I ended up having to do, was modify the solid drop hitch. Had to shorten it by 2" because it would bottom out occasionally. You guys have always given me great service, technical advice, and selection of products to work from. 583287

- 66557

Just as I expected. 486674

- 66557

I bought the 4,000 lb Reese weight distribution system for my 3,500 lb GVWR pull behind trailer. I did install it myself and it works just like it says it does. It does make a loud noise when turning that is annoying. So I would recommend getting the chain type and not the friction one. But then you need the sway control arm. I did have the same problem another writer posted about that the brackets that hold the tension arms were the wrong ones and the holes did not line up but etrailer sent replacements right away that where the correct one. The hitch does not come with a ball so I brought it to a local trailer company that installed my trailer brakes and bought a ball from them for $11 and they installed it for free. It takes a thin wall socket and 140 foot lbs of torque! Otherwise it was simple to install myself. As long as you have a 3/4 in socket 1/2 in drive. Also, be aware that the trailer tongue arms dimensions must be no more than 1 1/2 in wide and at least 3 1/2 in tall or it will not fit. I would recommend calling the company to insure to get the correct weight distribution system so if you have a problem later they will have to honor it. 471076

- 66557

Quick shipping. Clear directions. etrailer is a well organized seller. As with other Reese products, top quality. If your level trailer has a top-of-the-ball height of 13" or so, be aware that the weight distribution system may put the hitch pretty close to the road (perhaps a clearance of 6"). OK for us on the Interstates, but would be a problem if you are hauling over uneven terrain. 462576

- 66557

The Reese 66447 is just right for my single axle 3500# GVWR utility trailer. My slope mower is right at the maximum allowed net weight and the trailer is maximum allowed width. So sway and wander on these twisty WV back roads is not acceptable. This hitch restored my tow vehicle front height to normal and there was no sway or wander in the mountains. The install was easy and removal/replacement was quick. Very well made for a light application like this. In slow maneuvers the friction pads are LOUD, but when cruising I did not notice them. The delivery and follow-up from etrailer.com was first rate too. 388491

It still deserves the 5 star rating.
Rooster - 06/03/2018


- 66557

I've used this for about 20,000 miles with my 3000 lb camper trailer and found it to work well. I use an electric trailer jack to hook and unhook. I am able to pull at higher speeds, e.g. 70 MPH and with crosswinds. Made my pulling experience much more pleasant! 383041

- 66557

I'm very happy with this weight distribution/antisway hitch. Hopefully I will be able to find some new friction pads when they wear out. It was very noisy at first, but now that it is broken in the friction pads don't make so much noise. 371484

- 66557

Awesome product variety and great communication! Will shop here again 332206

- 66557

I have used it several times to pull a 3000 lb travel trailer and it has worked very well. My tow vehicle stays level and swaying is damped. The setup is straight forward but takes a little time. I did it in a flat paved parking lot. I added an electric jack on the trailer tongue. This makes attaching and detaching much easier. The only issue I have is that the pads the springs rest on have pieces broken off. I ordered a new set but one side chipped off the first time I used them. 311487

- 66557

Haven't had a chance to tow our R-pod180 with our 2015 Jeep JKU Wrangler yet, but the installation went smoothly. Read and understand the directions first, and you shouldn't have any issues. You'll need a BIG torque wrench (or a BIG breaker bar) to properly tighten the hitch bolts. Take the time to set everything up according to the directions. Overall, this appears to be a quality product. I'll update the review after we've put a few hundred tow miles on it. 254854

- 66557

We like the end result of using this hitch with our travel trailer. However, there are some quality issues. I have attached a photo that shows how the holes in two of the frame bracket assembly pieces did NOT line up. The holes in the other two pieces did align. Also, we had to replace the friction pads, after only one trip, and are still having a problem with one side having more tension on it than the other side. BUT, we are still very glad we are using the hitch, it has made such a difference in traveling with the trailer. 229267

- 66557

Product itself is very good. Instructions and phone support are terrible if you are new to this stuff. Eventually figured it out through trial and error. Helps to have the right tools and a second set of hands. Works great! 152409

- RP66559

Review from a similar Steadi-Flex in Weight Distribution Hitch

The item arrived with a large hole in the box. One of the pieces to the hitch was missing. I called up etrailer and spoke with Noah and he was great. I had the part in 2 days. Thank you etrailer for wonderful customer service!!!! 641773

- RP66559

Review from a similar Steadi-Flex in Weight Distribution Hitch

Awesome product!! Even better service specially after the purchase when parts were missing. The staff at etrailer took care of it immediately! 612976

- RP66561

Review from a similar Steadi-Flex in Weight Distribution Hitch

Very heavy duty. Well made and easy to assemble. It “groans” a bit in tight turns until you shoot the trunnion bars with lube at the hutch end. Otherwise a really nice piece of equipment for the price. Does a terrific job stopping bounce and sway. 638561

- RP66559

Review from a similar Steadi-Flex in Weight Distribution Hitch

This product works very well, I have used several different types of distribution systems in the past. The integrated sway and weight distribution saves time and effort. Once set up into place there is no sway and the distribution really helps to make pulling our camper much more pleasant. 638372

- RP66559

Review from a similar Steadi-Flex in Weight Distribution Hitch

Good price ,in stock, and easy to install, etrailer makes finding the right hitch easy 662327

- RP66559

Review from a similar Steadi-Flex in Weight Distribution Hitch

easy to install and can back up with this hitch 405982

jim c - 07/15/2018


- RP66560

Review from a similar Steadi-Flex in Weight Distribution Hitch

Product worked perfectly 691249

- RP66559

Review from a similar Steadi-Flex in Weight Distribution Hitch

I installed this hitch while my trailer was in winter storage. The instructions were very good, and it was not difficult to install. A few weeks ago I got the trailer out of storage and was able to verify the measurements of the setup were exactly correct. I then towed my 25 foot travel trailer more than 2000 miles and could not be happier with the ease of hookup, unhooking and towing. The weight distribution was perfect and sway control was much better than with the old pro-style chain and torsion bar system I had used for about 30 years. I wanted a hitch that required less physical exertion to hookup and unhook, and I wanted better sway control. This hitch is the answer. It makes some noise at slow speeds, sometimes sounding almost like a horn or a low-pitched squeal, but I believe it is less noisy than other similar products, and it less noisy than my old system. I bought this hitch after doing considerable research, then talking with a very helpful salesperson at etrailer. When I called back with a followup question a couple of hours after I placed the order, I talked with a different salesperson who was equally as helpful. I received the hitch within days of the order. I then sent an email to etrailer with a question. Within about a day, they replied with a message from the manufacturer that answered my question. Over the years, I have purchased several items from etrailer and have always been pleased with their service. I strongly recommend this Reese Steadi-Flex hitch and etrailer. 489150

Show More Reviews

Ask the Experts about this Reese Weight Distribution Hitch

  • How to Reduce Trailer Sway While Towing with a 2017 Jeep Wrangler Sport
    In order to help reduce trailer sway while towing with your 2017 Jeep Wrangler Sport, I recommend using a weight distribution system like the Reese Steadi-Flex Weight Distribution System part # 66557. The Steadi-Flex is going to not only help reduce trailer sway but it will also help to distribute tongue weight which improves braking and the overall handling of your tow vehicle. The only thing you will need to use this system is a hitch ball, part # 63017 or part # 63845. Please note...
    view full answer...
  • Installation of Hitch Ball on Reese Steadi-Flex Weight Distribution System Head
    The Reese Steadi-Flex Weight Distribution System w/ Sway Control # 66557 is not able to come with the hitch ball installed and torqued. You would then need the 2" Hitch Ball - 1" Diameter x 2-1/8" Long Shank - Chrome - 7,500 lbs # 63845 which would need to be torqued to 250 ft/lbs as stated in the product description. It is a 1-1/2 inch nut so you can use a socket or wrench like # C20001. Most torque wrenches don't go to that spec, so you simply need to make sure the lock washer is completely...
    view full answer...
  • Replacement 1 Inch Square Spring Bars for Weight Distribution System with Sway Control
    If you are looking for weight distribution trunnion bars, we do have replacement options. Because you specified square bars that narrows down your system to an Equal-I-zer. We have the Replacement Spring Bar for Equal-i-zer Weight Distribution Systems - 400 lbs TW # EQ90-02-0499 which are 35-1/2" long x 1" wide. If you want the set, we have the Replacement Spring Bars for Equal-i-zer Weight Distribution Systems - Qty 2 - 400 lbs TW # EQ90-01-0499. Those are the only bars that...
    view full answer...
  • Replacement Brake Pads for Reese Light Duty Weight Distribution System 66557
    Sounds like you are in need of replacement friction pads for your Reese Light Duty Weight Distribution System part # 66557. For that you would need the part # RP58497.
    view full answer...
  • Recommended Weight Distribution With Sway Control on 2016 Toyota Highlander With 3000 Pound Trailer
    A weight distribution system is recommended anytime your trailer's weight is at least half of your tow vehicle's weight. So with your 2016 Toyota Highlander towing a 3000 pound trailer, I definitely recommend using weight distribution with sway control, instead of just sway control. To choose a system you need to use your 300 pounds of tongue weight combined with the amount of weight stored in the back of your Highlander behind the rear axle. You want to make sure you have a system...
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  • Installation Instructions for Reese Steadi-Flex Weight Distribution System 66557
    Since you provided the part number # 66557 of your Reese Steadi-Flex Weight Distribution System you can refer to and print the complete written instructions which I linked for you. These instructions also apply to the previous model number for this kit, 66041. A couple of videos are linked as well. 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 ball coupler and they can fit...
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  • Does the Head of the Reese Steadi-Flex Need Adjusted for Different Loads
    The head tilt adjustments on the Reese Steadi-Flex Weight Distribution System are used to apply different amounts of tension to the spring bars. The tension on the spring bars will need to be adjusted accordingly to the trailer's tongue weight. Since the tongue weight of the trailer will change when you add or subtract your motorcycle(s), you will need to adjust them each time to ensure you are receiving the best performance from the system. Please keep in mind that a weight distribution...
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  • Weight Distribution for a Cargo Trailer with 200 Pounds Tongue Weight and a 2013 Ford Edge
    When determining tongue weight you also have to add the weight of anything loaded behind the rear axle of the Edge to the tongue weight of the trailer to get the total tongue weight. I recommend going with a system rated for 250 to 400 pounds like # 66557. This system also comes with friction sway control and a shank so you will just need to add a properly sized ball like # A-90 for a 2 inch or # 19286 for a 2-5/16 inch. I have also included a link to our FAQ article on weight distribution...
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  • How to Easily Install Both Spring Bars on the Reese 350 Mini-Lite Weight Distribution System
    Since you are following the instructions closely and have checked things out, it sounds as if you have a common issue that shows up when setting weight distribution spring bars. Once one side is attached the other side becomes very difficult to install because of the weight that the system is trying to distribute. You would most likely have the same problem if you installed the left hand bar first, you would then have trouble with the right hand spring bar. The fix for this situation...
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  • Recommended Weight Distribution And Sway Control System For 2017 Jayco 195RB Jay Flight SLX
    For your 2017 Jayco 195RB Jay Flight SLX, you want to choose a weight distribution system based on the total tongue weight. This includes the total loaded tongue weight of your trailer and any cargo behind the rear axle of your 2016 Honda Odyssey that is towing it. I've attached an article to assist. I recommend the Reese Steadi-Flex Weight Distribution System w/ Sway Control - Trunnion - 4K GTW, 400 TW, # 66557, that will fit a total tongue weight range of 250- 400 lbs. It will...
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  • Trailer Hitch, Weight Distribution, Brake Controller, Wiring, Accessories for a 2009 Toyota Sienna
    First, we should start with a trailer hitch for the 2009 Toyota Sienna. The most popular hitch for your vehicle is the Draw-Tite Trailer Hitch, # 75237. This is a Class III trailer hitch rated for 400 pounds tongue weight and 4,000 pounds gross trailer weight. When used with weight distribution it is rated for 500/5,000 pounds. I have included a link to the installation details and a video showign a typical installation. Next, you will need a ball mount, ball, and hitch pin. I recommend...
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  • Comparing the Reese Light Duty Weight Distribution System to the Pro Series RB2 for a 2700lb trailer
    When choosing a weight distribution system, the most important factor to consider is the fully loaded and ready to tow tongue weight of your trailer plus the weight of any cargo behind the rear axle of your 2004 Honda Odyssey. Tongue weight of a trailer is typically calculated to be 10 to 15 percent of the gross trailer weight. If your Scamp trailer weighs 2,700 lbs, then the tongue weight may be around 270 lbs to 405 lbs. You must then add the weight of the cargo that you load in the back...
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  • Weight Distribution and Brake Controller Recommendation for 2012 Chrysler Town and Country
    I have some information that will help, but I strongly recommend checking your owners manual to make sure you do not exceed the towing capacity of your 2012 Chrysler Town and Country. From my research, your Town and Country has a maximum towing capacity of 3,600 pounds when there are only 2 passengers, as listed in the owner's manual. The more passengers you have, the lower your maximum towing capacity will be. For your Town and Country, this maximum towing capacity does not increase with...
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  • Weight Distribution System Recommendation Airstream Bambi 16 ft Towed by 2014 Wrangler Unlimited
    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. Once you know your tongue weight...
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  • Compatibility of Weight Distribution with a C-Channel Frame on Pop-Up Camper
    In general, if C-channel frame members face inward - meaning that the two open parts of the Cs face each other - then bolt-on chain hangers like # RP58305 can allow installation of a WD system. Standard clamp-on hangers like those in Reese system # 66557 will not work since they need a front and rear surface to clamp onto. Clamps like this could potentially damage the c-channel. It is sometimes necessary in order to use a WD system on a c-channel frame to have some new material welded...
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  • Frame Bracket Recommendation to Allow a V-Nose Featherlite Trailer Use Weight Distribution
    Weight distribution systems can be used on V-nose trailers, but they require using bolt on trailer frame hangers instead of the included ones with the part # 66557. What you would need is the part # RP58305. These will bolt under the V-nose of your trailer and will not require clearance above the frame on the trailer. Check out the picture I attached that shows how they install without needing clearance.
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  • Which WD Hitch and Sway Control For Forest River Wildwood 26BH Trailer Towed By 2007 Nissan Armada
    Weight distribution systems should be used any time the trailer weighs more than 50 percent of the vehicle's weight. It is also recommended on trailers exceeding 26 feet that you have sway control on both sides or use dual cam sway control. I did some research and found that the dry weight of your Forest River Wildwood 26BH Trailer is approximately 4050 lbs when not loaded. When choosing a weight distribution system, the tongue weight of your trailer will determine the proper weight...
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  • Which WD System Will Work With Reese Pole-Tongue Adapter # RP58393 Towing Trailer With Surge Brakes
    I recommend to use the Reese Weight Distribution System w Sway Control part # RP66558. This system will work with the Reese Pole-Tongue Adapter, part # RP58393, on your 2003 Honda Odyssey. It has a tongue weight capacity range of 200 to 600 lbs. and a gross towing weight capacity of 6,000 lbs. I am including a link to the installation instructions on the Reese weight distribution system. The system does not include a hitch ball. Use # 63845 for a 2 inch ball or # 63847 for a 2-5/16...
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  • Recommended Light Duty Weight Distribution System For
    I recommend the Reese Light Duty Weight Distribution System w Sway Control, part # 66557, that would work for you. This system is designed to handle up to 4,000 lbs gross towing weight and can handle tongue weight from 250 to 400 lbs so this would be a good fit for your Scamp trailer with your 2014 Ford Edge. This system also features sway-control that helps keep limit sway caused by crosswinds or poor trailer loading. I have attached a link to a helpful article about weight distribution...
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  • Recommendation For Reducing Sag On A 2016 Land Rover Evoque Towing 2,000 lb Enclosed Cargo Trailer
    There is not a weight distribution system that is compatible with a Class II hitch like you currently have on your 2016 Land Rover Evoque. I recommend upgrading your trailer hitch receiver to the Curt Trailer Hitch Receiver - Custom Fit - Class III - 2" # C13128 confirmed to fit your vehicle and compatible with a weight distribution system like the Reese Steadi-Flex Weight Distribution System w/ Sway Control # 66557 which would be a great system for you. This is an easy bolt on installation...
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  • Can Reese Weight Distribution System Be Used On Pop-Up Camper With C-Channel Trailer Frame
    Based on the weight of your 2004 Toyota Sienna at approximately 5,700 lbs, and the weight of your 2004 StarCraft 2406 pop-up camper at about 1,800 lbs it may not be necessary to use a weight distribution system. Typically a weight distribution system is not needed unless the trailer weighs over 50 percent of the towing vehicle weight. You will want to check with the trailer manufacturer to see if a weight distribution system can be used with your camper. If the reason you are wanting...
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  • Does Using Weight Distribution Increase the Tongue Weight of a Trailer
    Weight distribution spring bars simultaneously pull down on the trailer ferame, which increase the weight on the hitch ball, and lift up the weight distribution head that the ball is on, which basically cancels out any additional weight that was put on the ball. When the system is set up properly the tongue weight of the trailer should stay roughly the same though it will likely be a little higher. Provided that the tongue weight is within the capacity of the hitch to start with you...
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  • Reese Weight Distribution Hitch Recommendation
    I have a weight distribution recommendation for you, but the Reese Weight Distribution Hitch # 66069 is obsolete and no longer available from Reese. If you are looking for a light duty weight distribution system, I recommend the Reese Light Duty Weight Distribution System with Sway Control # 66557. This weight distribution system features trunnion bars for greater ground clearance, fits tongue weights between 250 - 400 pounds, and uses friction pads to help reduce trailer sway. This...
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  • Can a Toyota FJ Cruiser Tow a 4,875 Pound Wolf Pup Trailer and Recommended Weight Distribution
    The tongue weight of 525 pounds is likely if the trailer was loaded to its gross capacity of 4,875 pounds because 525 is about 10.75 percent of 4,875 and trailer tongue weight is typically 10 to 15 percent of the gross trailer weight. So if you load the trailer to 3,200 pounds then at 10.75 percent the tongue weight would be 345 pounds. Provided that the hitch and your tow vehicle have the capacity for the gross trailer weight and tongue weight then you would be good to go. Also the...
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  • Availability of Light Duty Weight Distribution Systems
    We have very light duty weight distribution systems, but none of them will fit a 1-1/4 inch hitch since that hitch size isn't designed for the torque the WD systems can put on hitches. For a light duty weight distribution system that will fit a 2 inch hitch the Reese Light Duty part # 66557 is for tongue weights up to 400 lbs. If you need a higher rated system the part # RP66540 is for 200-600 lbs of tongue weight. For a 2 inch ball you would want part # A-90 and for a 2-5/16 inch...
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  • How to Properly Setup the Reese Steadi-Flex Weight Distribution System
    I am not sure I understand what you are asking. The frame brackets on the Reese Steadi-Flex Weight Distribution System part # 66557 can be positioned between 25" - 32" back from center of coupler. This will then allow a minimum of 3" between the end of the friction pad and the end of the spring bar which will be needed to ensure that the spring bar does not fall out when turning. If you take a look at the attached install instructions this will then give you all of the info that you...
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  • Recommended Weight Distribution/Sway Control for 2000 lb Scamp TT Towed By Jeep Wrangler Unlimited
    If the tongue weight of your Scamp plus the weight of any cargo carried in the cargo area of your Jeep behind the rear axle is less than 400 lbs (which it should be), I'd recommend the Reese Steadi-Flex Weight Distribution Kit, part # 66557. This kit is compatible with smaller trailers with tongue weights up to 400 lbs. In addition to the weight distribution component, the integrated sway control system will greatly reduce trailer sway. The kit includes the weight distributing shank, but...
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  • Best Weight Distribution for Trailer Weighing 3,000 lbs
    That's a pretty low tongue weight for most weight distribution systems, but the Reese Steadi-Flex kit part # 66557 would be the best option. Also, you should note that if you are experiencing sway the problem is a lack of tongue weight. If your tongue weight is on 190 lbs but the trailer weighs 3,000 lbs that's why you're getting sway. You need the tongue weight to be at least 300 lbs. For a hitch ball you then would want the part # 63845.
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  • Light Duty Reese Weight Distribution System Recommendation for Coleman Tent Trailer
    The Reese WD system part 66041 that you referenced is no longer in production so replacement parts aren't available. The only solution I can provide would be the Light Duty WD System part # 66557 as a replacement for it.
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  • Weight Distribution for a 2014 Dodge Grand Caravan and 17 Foot Casita Travel Trailer
    The first thing you will want to do is consult the vehicle owners manual and the trailer hitch safety sticker to determine if both are rated for use with weight distribution and for the required towing capacities. I looked up information on the trailer and there are numerous 17 foot Casita Deluxe models across the years. It looks like the dry weight at most is 2,500 pounds. To choose a weight distribution system you will need to go by the total tongue weight. This is calculated by taking...
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Info for this part was:

Expert Research:
Mike L
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Adam R
Expert Research:
Jeffrey L
Updated by:
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Video Edited:
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