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  1. Anti-Sway Bars
  2. Roadmaster
  3. Anti-Sway Bar
  4. Rear
  5. 1-3/4 Inch Diameter
  6. Steel w Polyurethane Bushing
Roadmaster Rear Anti-Sway Bar

Roadmaster Rear Anti-Sway Bar

Item # 1139-144
Our Price: $815.94
You Save: $555.04
Anti-Sway Bars

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Shipping Weight: 107 lbs
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1139-144 - Steel w Polyurethane Bushing Roadmaster Anti-Sway Bars
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Minimize sway and driver fatigue by improving the stability and driveability of your vehicle. The bar on this sturdy, effective anti-sway system mounts to the rear axle and to the frame to balance weight transfer and reduce body roll. 1-800-940-8924 to order Roadmaster anti-sway bars part number 1139-144 or order online at Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Roadmaster Rear Anti-Sway Bar. Anti-Sway Bars reviews from real customers.
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Roadmaster Anti-Sway Bars - 1139-144

  • Anti-Sway Bar
  • Roadmaster
  • Rear
  • 1-3/4 Inch Diameter
  • Steel w Polyurethane Bushing

Minimize sway and driver fatigue by improving the stability and driveability of your vehicle. The bar on this sturdy, effective anti-sway system mounts to the rear axle and to the frame to balance weight transfer and reduce body roll.


  • Minimizes side-to-side movement to improve overall stability of your vehicle
    • Lets you execute turns and quick maneuvers with confidence
    • Allows for a level ride, even on irregular surfaces
    • Reduces driver fatigue - minimizes effort required to keep your vehicle in line
  • Diminishes effects of crosswinds, passing motorists and shifting cargo
  • Designed to fit your vehicle and work in conjunction with its suspension system
    • Attaches to rear axle and to chassis - uses weight of axle to brace frame as it shifts in turns
    • Engineered to avoid interference with most popular aftermarket add-ons and accessories
  • Made with polyurethane bushings instead of the standard rubber variety for a longer-lasting system
    • Polyurethane is durable and resistant to damage caused by oil, gasoline and ozone
    • Less wear means less give in the system and better support
  • Constructed of thick 4140 chromoly steel for superior strength
  • Includes heavy-gauge mounting hardware, easy-to-follow instructions and bushing lubricant
  • Works with front anti-sway bar (sold separately) for absolute stability - available on certain applications only
  • Made in the USA


  • Bar diameter: 1-3/4"
  • Limited Lifetime Warranty

Roadmaster Anti-Sway Bar Installed

Benefits of an Anti-Sway System

The Roadmaster anti-sway bar does for side-to-side movement what a good pair of shocks does for up-and-down motion. You will notice a marked improvement in your vehicle's stability as the bar works to balance weight transfer and reduce body roll. The anti-sway bar acts as a link between your vehicle's frame and its rear axle, using the axle as a brace to more effectively balance the shifting weight of your vehicle as you maneuver it. Lubricated bushings allow just enough pivot and rotation to compensate for the pressure placed on one side of your vehicle when it goes into sudden maneuvers, hits crosswinds or encounters shifting weights.

Roadmaster Anti-Sway Polyurethane Bushings

Superior Construction

The Roadmaster anti-sway bar is made of 4140 chromoly, a chromium and molybdenum steel alloy. This type of steel is considerably harder and stronger than the standard 1020 steel that is typically used in anti-sway applications. In addition, the larger diameter of the bar increases its torsional roll stiffness. The result is a bar that is not only stronger than the competition, but also nearly 30 percent better at resisting sway. The polyurethane bushings and grommets used at the attachment points are durable yet flexible, ensuring that the system is neither so rigid nor so malleable that it becomes ineffective.

1139-144 Road Master Anti-Sway Bar - Rear

Installation Details 1139-144 Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Roadmaster Rear Anti-Sway Bar - 1139-144

Average Customer Rating:  4.8 out of 5 stars   (1660 Customer Reviews)

Minimize sway and driver fatigue by improving the stability and driveability of your vehicle. The bar on this sturdy, effective anti-sway system mounts to the rear axle and to the frame to balance weight transfer and reduce body roll.


I have no more sway on our 2005 Fleetwood Southwind Class A after installing this sway bar. However, I must be honest, When I went to install this sway bar, I found that both of the bushings and one of the brackets that attached the factory sway bar to the chassis were completely missing. I replaced the bushings and bracket at the same time that I installed this Roadmaster HD sway bar. I can't honestly tell whish fix or the combination made the difference.

1999 Ford F-53

I ordered the sway bar on Thursday 8/15/2013 and received it on Thursday 8/22. That was very quick shipping for something as heavy as the kit. Price was the lowest I could find on the net. The list price is $980.00 found some places charge around $100.00 less then list plus shipping. Saved a lot by buying from What surprised me was that was able to ship it right away, when I talked to Roadmaster they said the kit was out of stock and would be two to three week before it would be shipped, was told the samething by other's I checked with. Good experience shopping at, will be back.

After over a year the sway bar is still the best investmentupgrade I made to the F53 to eliminate the tailwag of a motorhome with a long overhang. Handles great in side winds and on winding roads. The sway bar is well worth the cost and etrailer has the best price with free shipping.
Chuck B - 02/24/2015


Good price , got it fast that = happy customer . The sway control was easy to install drilling the frame takes a good sharp drill bit . The only problem I had was when I install the bar I install it upside down witch make it hit . When I called RoadMaster after a bit they told me to flip the bar over . I told them in the instructions they only say to install bar , no this side up or this side down so I put it with the RoadMaster name up . He said there was a running joke if the label was down it probably was rite . NO JOKE TO ME .

1999 Ford F-53

I purchased a 2000 Itasca 35U on the Ford Chassis last fall. On the 250 mile drive home on the Coquihalla Hwy in BC Canada ( highway thru hell ) I was white knuckled and afraid this was not ever going to be enjoyable or safe drive.
Did I waste my money? No.

With a little research I found what I hoped would save my dream of hitting the road in this motor home. I found etrailer on line and they had everything I wanted and at the best price I could find anywhere.

I purchased the Roadmaster Front and Rear Anti-Sway bars for this Ford chassis and replaced all four shocks.

The " Roadmaster Products" transformed the drive better than I could expect or ask for. It feels safe and solid on the road! I am so thankfull.

etrailer earned my business and trust. If you are looking to feel safer and more in control in your motorhome, buy this package! I deserved to enjoy a safe and stress free ride and so do you.

In conclusion, etrailer and their Roadmaster products are a must for this motorhome.


I bought this kit with the intention of installing myself, but a quick review of the instructions convinced me to take it in to a shop instead. The installation is not particularly difficult, but was facilitated by some tools that I simply didn't have. In particular, you'll need a BIG torque wrench to retorque the U-bolts, and on a lesser difficulty level, you'll need a very compact drill and stubby bit to install the frame brackets. I could not get a straight path to the correct location with my drill. It took the shop less than an hour, and was probably much simpler for them since they could put the vehicle on a lift. Otherwise, no surprises. The install could be completed by a home mechanic, but would require at least one somewhat specialized tool - a torque wrench rated to around 400 ft-lbs. The Roadmaster instructions suggest reusing the old U-bolts if they are long enough. I called a different source for new U-bolts, and the tech there suggested that, whether the old bolts fit or not, I should probably purchase new bolts. Apparently suspension U-bolts are threaded in such a manner that they are not intended to be reused. News to me.

2015 Ford F-53

What a complete difference this made on my Class A motorhome. At highway speed, I am no longer pushed aside by the big rigs. The coach tracks straight a whole lot better, and body roll is improved. Installed it myself, with help from a buddy? Highly recommend this sway bar!

This is my second purchase from etrailer. Both flawless, with quick shipping.

2014 Honda CR-V

Bought this a year ago. Arrived promptly. Installed with no real problems. I had to get a larger torque wrench to get the bolts tightened to specs. 5000 miles later, I have really enjoyed the improved handling. I also installed the front sway bar. I would highly recommend this to anyone.


Easy to install, but of questionable value. Reduction in sway was perceptible, but in the end it resulted in only modest improvement.

I bought both front and rear anti-sway bars for my 2015 Forest River Georgetown 364. After over 10K miles, I still say the improvement is only modest. It wasnt until adding Sumo Springs that I saw a significant improvement.
Vince - 05/05/2017

2000 Ford F-53

Great service. Shipped UPS 3 days. Arrived yesterday. Some of the packaging could be better, but overall I'm very happy. Haven't installed yet, I'll post some pictures of them later. Hopefully they will improve the ride/driving in my F53 chassis motorhome as much as Roadmaster claims.

2014 Ford F-53

It has significantly helped with sway of the coach. I am looking to install next year front steering control for additional safety. Etrailer is a great source to purchase RV products.


Can’t imagine how I drove my rig without it

2015 Ford F-53

Fit perfectly. Made a huge difference in ride and body roll. This fit a 2015 Winnebago Brave with a DANA 80 rear. F53 chassis 16000lb GVWR


I received but not installed .I will get back with you with pics and review in a few months after I travel some.
Order was received and shipping was spot on. great job!

the product is great and has made driving easier Install was a snap
ROY J - 04/05/2018


Livraison du produit rapide bon produit facile à installer exellent

2011 Ford F-53

I installed the 1-3/4" sway bar kit. I have a 38' coach so wanted all the help I could get. Thus far the improvements to the handling have been very very welcomed. It's now a rarity that that I encounter any sway or push from passing trucks and barely noticeable sway from strong crosswinds. Now I don.t have to fight the coach constantly. Driving is much more relaxed.


I was very pleased with the service that I received. Very prompt shipping and received my order as scheduled. Camping World will be installing it on Tuesday the 27th.


Christine who helped me was great. She helped me tremendously.


1999 Ford F-53

2001 Ford F-53


Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars

I installed both front and rear Road Master anti sway bars on our last RV and they made a tremendous improvement in handling. It was easy for me to install by myself in my driveway on out Coachman Leprechaun 319MB. I highly recommend this product.


Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars

On my 2021 Mercedes Benz class C Tiffin Wayfarer this rear anti-sway bar fit perfect. I didn’t have to make any modifications to the exhaust. With help I had it installed in 2 hours and 50 minutes. The pictures on the instructions could have been clearer to understand.


Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars

I have a 2017 Ford F350 Super Duty SRW, and we haul a heavy truck camper (Lance 1055.) I have Stable Load Uppers and HD airbags, but wanted to add a sway bar to add that extra layer of control, even though my truck has handled the camper well over the last 2 years and 10,000 miles. My truck did not come with an OEM sway bar installed, so I needed this kit that included the End Links too.

The Roadmaster Rear Sway Bar and End Links sold on etrailer are top quality products. They are robust and well made, with quality hardware to match. The product deserves a 5-star, and even unloaded, my truck handling improved right after installation, with improved cornering and no real impact on ride quality in my opinion. I have not yet loaded up our camper or towed our boat, but I have no doubt this sway bar will substantially reduce sway and will improve control and handling when the camper is loaded.

So why 4 stars and not 5?

1. I researched this product and the installation in detail. I planned on installing it myself and expected to find plenty of detail on etrailer's site, or Roadmaster's site, or the internet. My most pressing question was about where to mount the end links, and the orientation of the sway bar arms since I wouldn't be using the OEM end links. That information was no where to be found on the etrailer site, Roadmaster's site, or in any installation manuals. For a product and supplier that has likely sold lots of these to Ford Super Duty owners, I was surprised to find how little info was out there. The installation video on the etrailer site was helpful, but did not include any information for the end links, as they had a 2015 Super Duty and used the OEM end links already installed. I contacted etrailer and they told me to contact Roadmaster for more info on where to locate the end links with this kit.

2. I contacted Roadmaster. They told me they had no instructions and that despite my truck already having the cut-outs for the OEM bracket that attaches the OEM end links to the frame, that none of those holes may work for me. So they suggested I connect the sway bar brackets to the axle first and then see where the arms would line up with the end links. The tech also suggested that it wasn't critical that the end links were perpendicular
to the frame, but that I should try install the end links to allow the arm of the sway bar to hand as close to parallel as possible. No bueno. When I installed this the 14" end links (center hole to center hole) didn't allow for the arms to hang parallel to the frame. And I don't think it matters as the orientation of my sway bar and the arms looks about like every video or picture I could find on the internet of this year/model truck and this sway bar kit. It seems to function fine.

3. Installing it was a bear, especially the way they instructed me to. And I had to make some modifications to fit my truck, as the sway bar arms were rubbing up against my airbag mounting brackets. I got it installed, but the thin instructions turned what should have been a 60 minute job into 2 1/2 hours. A bit frustrating.

All in all, this will do the job intended and will provide me with peace of mind next time we load our camper. I am a bit frustrated that there were zero installation instructions specific to my year/make/model of truck given it did not have an OEM sway bar and the end links had to be installed with a bit of guesswork. You will also note in my pictures that I had to mount the end links to the sway bar arms differently on each side to make the bar fit around my air bag mounts.


Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars

This product arrived on time, and is as described in company literature. I have installed the sway bars and the sumo springs on my 2019 Ford E3 26 foot Thor motorhome. Installation is fairly straightforward. Having said that, I am a retired farmer and I am quite familiar with this type of work. Having the proper tools makes the job go much quicker and easier. Installation of the front sway bar took a little under an hour. The rear sway bar is a bit more complicated to install, but he can be easily accomplished by someone of average mechanical skills, equipped with the proper tools. I strongly recommend removing the rear wheels to facilitate installation of the springs and the sway bar. I have not driven my motorhome yet, but will be taking an extended trip in March. I am looking forward to an improved ride.


Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars

Installation was straightforward and fairly easy to install. The instructions were clear which helped to get the anti-sway bar installed without any damage or incident during the process. What a difference it makes while driving. Great product.

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