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

Roadmaster Rear Anti-Sway Bar

Item # RM-1139-143
lowest price pledge
Retail:$912.49
Our Price: $741.24
You Save: $171.25
Anti-Sway Bars

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

This item qualifies for Free Shipping
Shipping Weight: 87 lbs
Quantity: 
In Stock
zoom in icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos

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. Call 800-298-8924 to order Roadmaster anti-sway bars part number RM-1139-143 or order online at etrailer.com. Free expert support on all Roadmaster products. Guaranteed Lowest Price and Fastest Shipping for Roadmaster Rear Anti-Sway Bar. Anti-Sway Bars reviews from real customers.
  • All Info
  • Reviews (416)
  • Q & A (58)
  • Videos (2)
  • Photos
  • Why etrailer?

Roadmaster Anti-Sway Bars - RM-1139-143

  • Roadmaster
  • Anti-Sway Bar
  • 1-1/2 Inch Diameter
  • Rear
  • 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.


Features:

  • 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, black powder-coated 4140 chromoly steel for superior strength
  • Includes heavy-gauge mounting hardware, easy-to-follow instructions and bushing lubricant
    • Extended-length U-bolts (RM-590050-00) may be required for installation
  • Works with front anti-sway bushing kit (sold separately) for absolute stability - available on certain applications only
  • Made in the USA


Specs:

  • Bar diameter: 1-1/2"
  • 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 black powder-coated 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.



1139-143 Road Master Anti-Sway Bar - Rear

Installation Details RM-1139-143 Installation instructions

This Product Fits The Following Vehicles




Video of Roadmaster Rear Anti-Sway Bar

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




Video Transcript for Roadmaster Rear Anti-Sway Bar Review

Speaker 1: Today we're gonna be taking a look at Roadmaster's Line of Rear Anti-Sway Bars for motorhomes. You want to refer to our fit guide to find the appropriate sway bar for your vehicle.The large size and heavy weight associated with motorhomes can cause drastic amounts of sway when driving down the road. To help create a safer ride, and reduce driver fatigue, we can minimize the sway by adding an additional rear sway bar. So when making basic maneuvers or sharp turns, you'll minimize the risk of a rollover.Also, when driving on windy days, on uneven pavement, you can get a sway affect going back and forth, and you'll have to compensate for that with the steering wheel to maintain and safe, straight path.This additional bar will help reduce that amount of sway, making it easier to maintain control of your vehicle and reduce vehicle fatigue, 'cause you're not having to compensate as much.The Polyurethane Bushings will help dampen road vibrations, and additionally stand up to corrosive road oils, salts, and UV rays. The bar is made up of 4140 chrome steel, where most factory bars are only made of a lower strength, 1020 steel.And to maximize your reduction of sway, Roadmaster recommends you also get a front anti-sway bar. Using our fit guide at etrailer.com you can pick out the appropriate rear and front end anti-sway bars for your motorhome.Now we'll take our anti-sway bars out on our test course.

When we go into our alternating bumps, you can instantly feel a difference in the amount of sway. It's a lot more stable side to side then it was before, making it much easier to maintain control of the steering wheel.And then we'll head onto our straight bumps. When we hit those, there's a definite difference in how much forward and back movement than we had before. It's definitely a more comfortable ride than what we had. And again, it's easier to maintain control of the steering wheel.And now we'll head onto our slalom where we can really test our the sway capabilities.

So if we have some evasive maneuvers, how our motorhome would react. And it's a massive difference. When turning, there's hardly any sway. I feel much more confidence taking sharp, evasive turns.Our customer David S purchased both front and rear Roadmaster anti-sway bars, and had this to say."I installed front and rear sway bars on my 2006 Itasca Suncruiser after making a winter trip to Florida from Ohio. We made a return trip this past winter, through the smoky mountains etcetera.

The improvement in handling was so noticeable, my wife noticed it from the passenger seat. I highly recommend both of these products. I have a workhorse w24 chassis. Crosswinds and semi-push was very minimal. One handed driving in most situations in the norm now, and driver fatigue was minimal.

Driving the coach is much more enjoyable."And that completes our look at Roadmaster's line of rear anti-sway bars for motorhomes.


Customer Reviews

Roadmaster Rear Anti-Sway Bar - RM-1139-143

Average Customer Rating:  4.8 out of 5 stars   (416 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.

- RM-1139-143
by:

ALTHOUGH I HAVE NOT INSTALLED IT YET, I AM SURE IT WILL BE OK, THE WEBSITE WAS WELL WRITTEN AND EASY TO UNDER STAND, AND THE ANTI SWAY BAR WAS DELIVERED TWO DAYS BEFORE PROMISED. GOOD JOB 120761



- RM-1139-143
by:

product worked as advertised and made my motorhome more easier to drive with hardly any tail wagging love the product 478439



- RM-1139-143
by:

Great delivery. Checked all parts, ready for installation. 213412



- RM-1139-143
by:

Excellent product. Well made. Great instructions. Easy install with proper tools. Made an incredible improvement in the handling of our 35 ft MOTORCOACH with F53 chassis. All necessary hardware was included. Delivery and shipping by etrailer was spot on. Would definitely recommend to anyone wanting to greatly decrease sway in a coach. 382594



- RM-1139-143
by:
1999 Ford F-53

Sway bars and steering dampener are installed and the sway has been reduced and dies out much quicker. I am 80 and was able to install everything myself but it is hard work. 707491



- RM-1139-143
by:
1989 Ford F-53

Wow, This sway bar is big, heavy, beefy and strong. I saw all the great reviews but was still surprised when I got it. Installation was straight forward but I did have to have a mechanic shop jack the RV up and take the huge bolts of the U-bolts because my impact wrench was not strong enough. I've only put a few mines on it since I installed it but I have already noticed a difference. 679596



- RM-1139-143
by:
2015 Ford F-53

Sway bar made a big difference driving in windy conditions. The motorhome is much more stable than before. 523960



- RM-1139-143
by:

product worked as advertised and made my motorhome more easier to drive with hardly any tail wagging love the product 478440



- RM-1139-143
by:
Ford

I just received the product, which weighs in at "Over 70 pounds" according to the UPS tape attached, and will be returning it unopened once I receive the Return Authorization slip. Please note that this action had to be taken because of "Operator Headspace"on MY PART !!! I failed to properly read the requirements and limitations in their advertisement. The 1139-143 is for a motorhome with the Ford F-53 for an up to a max of 34 foot motorhomes. Mine is a 37 foot and need the one for 18,000 to 24,000 lb. My mistake and the correct one is on the way thanks to the help from the wonderful service personnel at etrailer.com. Great service for less than smart people like me... Thank you so much etrailer.com!!! 406055



- RM-1139-143
by:

Very pleased with the improvement in ride and handling after about a year of use. Would certainly buy again! 300954



- RM-1139-143
by:
Monaco

Roadmaster Rear Anti-sway Bar and Roadmaster Reflex Steering stabilizer made a 1000% difference on my driving experience. No more being pushed around by the big rigs or the wind. I recommend these upgrades to any motor home. 2004 Monaco Monarch Ford V10 254812



- RM-1139-143
by:

WHAT A POWERFULL ADDITION TO MY OLD TIRED FACTORY SWAY BAR , HOWEVER THE CHASSIE BRACKECTS HAD TO BE MODIFYED, NOT A GOOD FIT. 232064



- RM-1139-143
by:

great product worked great 194623



- RM-1139-143
by:
2013 Ford F-53

All the products I have ordered arrived promptly and in secure packaging. The pricing was great and with the free shipping I doubt you will find it for less anywhere on the net. I definitely will do business with the guys again. I will be sending photos of completed project when I am finished installing. Thanks Steve. 177856



- RM-1139-143
by:
Allegro

Installed on a Tiffin Allegro 31SA by Whited Truck and RV Center in Auburn, Maine. The Roadmaster anti-sway bar and associated parts are rugged and of high quality. Installation time was about 3 hours; drilling the frame to secure brackets took the longest time. This anti-sway bar improved handing and reduced sway, especially on rough secondary roads. 137563



- RM-1139-143
by:

Driving in the wind is a breeze. No more rock and roll. Great product. Very Happy 16503



- RM-1209-131
by:

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


RM-1209-131 delivered a day earlier than promised. Installed on 2018 Winnebago 24V View on 2016 Mercedes 3500 sprinter chassis. Good fit had to modify the exhaust which exits on shotgun side ahead of wheels which was to close to the long links. Drove 20 miles to my indoor storage. Quite a reduction to side to side sway. Handles like a different vehicle (better). Can’t WAITE till our next trip. Tulsa auto spring did the installation. Mikes custom muffler shop did the exhaust modification. Do believe l made the right decision not to tackle the job on my own $250 to install. $120 for exhaust modification. In Tulsa, Ok wouldn’t, go anywhere else to get the job done. 715992



- RM-1139-149
by:

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


Drives and handles 200% better. Manufacturers should be required to install these at the factory. 672850



- RM-1139-146
by:

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


I have a class A motor home on an F53. They are scary to drive. Called Noah at etrailer.com. He knew just what I needed. Front sway bad, rear sway bar and steering stabilizer. Had them installed today and took about 100 mile drive. Wow, what a difference. Delivery was really fast and no one could beat them on price. I would use roadmaster products again. Thanks Noah for all your help!! 598297



- RM-1139-165
by:

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


I have a F350 dually with a 2300 pound slide in camper that rocked to the point it was scary to go around a turn. I just installed the rear sway bar and the difference is unbelievable. I have just ordered one for the front. Well worth the money. 135527



- RM-1139-149
by:

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


Tammy P. made sure I received the sway bar when I needed it. Great service. 683359



- RM-1139-149
by:

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


The product is great. The change in handling of my Ford F53 based motorhome is like day and night. The sway ( those of you who have an F 53 know what I’m talking about ) is so much more tolerable and no more white knuckles. The installation was straightforward but wasn’t as easy as it looked in the instructions. The torques were killer and took three of us to get done. The product does what Roadmaster clams it will do and I’m happy with the anti sway bar. 664236



- RM-1209-131
by:

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


It took a little effort on the phone to figure out which sway bar was needed for the motorhome I have. I was skeptical about the right one being sent but it was correct and installation was a couple of hours. It fit perfectly and really dampened the body roll we were having. Worked great, service and delivery was fantastic. This was the first time I have used etrailer.com and am very happy with their product and willingness to help. I'll be using them again and I highly recommend them. 356110



- RM-1139-147
by:

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


Product arrived quickly as usual with etrailer. The etrailer video was more handy than the accompanying instructions from Roadmaster. etrailer provided videos for both the early E450 and the later chassis installations. While essentially the same, there was a small difference of enlarging an existing hole on the early frame in my case a 2006 and having to measure to locate the hole on the later. It would be nice if Roadmaster included a parts diagram to help with assembly instead of small not clear pictures. I thought the parts package was short two half inch washers, I supplied them from my stock. The fittings on the Roadmaster bar are much heavier than the stock components. Installation is on a 2007 Coach House, motorhome. Took it for a test drive, big difference in handling. 460014



- RM-1129-111
by:

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


I have a 2000 dodge van 3500. Roadtrek versatile. The installation of Sway bar 1129-111 was somewhat easy. Except for connection to the Fram rails. Vinyl cover on driver side fram rail and propane lines next to rail on both sides. It would make installation Easter to remove rear tires and support vehicle on Jack stands on level ground. After driving for several miles the sway bar performed well. Would recommend rear sway bar to help stabilize your vehicle. Thank you 386045


25
450
Show More Reviews

Ask the Experts about this Roadmaster Anti-Sway Bars

  • Recommendations to Reduce Sway and Bounce on 1999 Bounder 28T Ford F-53 Motorhome
    To greatly reduce the bounce and sway you're experiencing with your 1999 Bounder 28T RV I highly recommend a combination of front and rear sway bars along with a steering stabilizer. For the Ford F-53 chassis on your RV that has an 18,000 pound GVWR the Roadmaster Rear Anti-Sway Bar # RM-1139-143 will work perfectly. This 1-1/2" diameter sway bar will actually work in support of the factory bar (the factory unit will not be removed) to provide much better stability on the road. It will...
    view full answer...
  • Solution for 2017 Forest River FR3 Which Pops Around Corners
    I found a forum online where a guy with your exact RV and suspension modifications who had the same problem and they fixed it by loosening the sway bar attachment hardware and then re-torquing them with the RV level and the problem went away.
    view full answer...
  • Rear Sway Bar Recommendation for a Workhorse W22 Workhorse Winnebago Adventurer
    Actually for your W22 chassis RV the correct rear sway bar would be the # RM-1259-109 for if you are 33 feet or longer or part # RM-1259-108 for if you are shorter than that. There will be some drilling required for installation. I attached instructions for both products for you to check out as well.
    view full answer...
  • Sway Bar and Steering Stabilizer Recommendation for 2017 Thor Ace 30.2 F-53 Chassis
    For your 2017 Thor Ace that is built on a 2016 Ford F-53 chassis rear sway bar upgrades are a great way to make a notoriously difficult to drive vehicle much easier to drive. For that you would want the # RM-1139-143 this will give you the biggest improvement in overall handling. A steering stabilizer like what you referenced # RM-RBK9-RSSA will help as well but we recommend typically to start with the rear sway bar. I would need to know what year/make/model of vehicle you plan to flat...
    view full answer...
  • Sway Bar Bushing and Mounting Strap for 2004 Ford F-53 Motorhome
    If you had the recommended Roadmaster sway bar for your 2004 Ford F-53 motorhome, part # RM-1139-143 we have the correct parts you would need. For the bushing you would want the part # RM-205219-10 and for the mounting strap # RM-B141.
    view full answer...
  • Improving the Ride Quality of an RV Built on a 2005 Workhorse W22 Chassis
    Yes! Probably the single best addition you can make to provide better handling in your RV would be to install a rear anti-sway bar. Helper springs treat the symptom but not the cause like an anti-sway bar would. There are 2 rear sway bar options for your 2005 Workhorse W22: # RM-1259-108 and # RM-1259-109 (for applications 33 feet or longer). Additional products for even more stability include axle stabilizers: # RM-TRACW-22 or # TT2304 for the front end. And adding a steering...
    view full answer...
  • Rear Sway Bar Recommendation for 2017 Winnebago with Ford F-53 Chassis
    We have rear sway bars that are a fit for your 2017 Ford F-53 chassis but you cannot use the front bar you have on the rear. If your RV is less than 34 feet long you would want the part # RM-1139-143 or if longer than that part # 1139-144. Typically a rear sway bar makes a larger impact in ride quality improvement than a front one does. We tend to recommend people start with a rear bar since it makes the biggest difference.
    view full answer...
  • Front and rear sway bars for 2017 Forest River RV
    Your 2017 Forest River RV is likely to be built on a 2016 model year F-53 V10 chassis. For a 2016 F-53 chassis use Roadmaster rear anti-sway bar # RM-1139-143. The factory bar remains in place when you install this unit. This particular Roadmaster part also fits the 2017 F-53. For a front sway bar then you would want the part # RM-1139-140 which is a confirmed fit.
    view full answer...
  • Comparing Anti-Sway Bars and Axle Stabilizers for an RV on a 2014 Ford F-53 Chassis
    Anti-sway bars and axle stabilizers are similar but they do different things. An anti-sway bar helps more with body roll which is that tilting side to side motion whereas an axle stabilizer helps for with the tail-wag motion. Both are going to make the RV more stable and more pleasant to drive. You can use both but if you wanted to try just one first I would recommend the anti-sway bar. For a the 2014 Ford F-53 chassis # RM-1139-143 fits RVs that are less than 34 feet long. Check to...
    view full answer...
  • Suggested Installation Time On Roadmaster Rear Anti-Sway Bar # RM-1139-143
    On your 2017 Fleetwood Bounder, the Roadmaster Rear Anti-Sway Bar for Motor Homes, # RM-1139-143 is not a confirmed fit. You would want to instead use # RM-1139-149 I reached out to my contact at Roadmaster for you and their suggested installation time is 2 hours for that product on your Ford F-53 Chassis.
    view full answer...

Do you have a question about this Anti-Sway Bar?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality anti-sway bars for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate anti-sway bar information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Expert Research:
Mike L
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
John H
Expert Research:
Adam R
Written by:
Lindsey S
Installed by:
Jeff D
Installed by:
David F
Video by:
Kathleen M
Video Edited:
Dustin K
Test Fit:
Randy B
Updated by:
Shelly K
Updated by:
Sarah W
Updated by:
Jenny M
Updated by:
Isabelle B

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.


Product Experts Available Now!
Call 800-298-8924