Roadmaster Rear Anti-Sway Bar

Roadmaster Rear Anti-Sway Bar

Item # RM-1139-146

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Our Price: $913.08

Anti-Sway Bars

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RM-1139-146 - 1-1/2 Inch Diameter Roadmaster Anti-Sway Bar
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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. Call 800-298-8924 to order Roadmaster anti-sway bars part number RM-1139-146 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 (27)
  • Q & A (74)
  • Videos (13)
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Roadmaster Anti-Sway Bars - RM-1139-146

  • 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
    • Designed to support your factory anti-sway bar - not to replace it
  • 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
  • Made in the USA


Specs:

  • Bar diameter: 1-1/2"
  • Limited 1-year warranty
  • Application: 16,000 lb and 18,000 lb GVWR chassis


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.



1139-146 Road Master Anti-Sway Bar - Rear



RM-1139-146 Installation InstructionsInstallation Details RM-1139-146 Installation instructions

This Product Fits The Following Vehicles

2005 - 2019 Ford F-53 15,700 GVWR

2012 - 2020 Thor ACE Motorhome 16,000 GVWR

2008 - 2019 Holiday Rambler Admiral Motorhome 16,000 GVWR

2016 - 2018 Holiday Rambler Admiral XE Motorhome 16,000 GVWR

2016 - 2019 Jayco Alante Motorhome 16,000 GVWR

2008 - 2010 Holiday Rambler Arista Motorhome 16,000 GVWR

2015 - 2016 Winnebago Brave Motorhome 16,000 GVWR

2010 - 2010 Fleetwood Encounter Motorhome 16,000 GVWR

2005 - 2019 Ford F-53 16,000 GVWR

2006 - 2018 Fleetwood Flair Motorhome 16,000 GVWR

2013 - 2019 Forest River FR3 Motorhome 16,000 GVWR

2019 - 2020 Thor Freedom Traveler Motorhome 16,000 GVWR

2016 - 2018 Forest River Georgetown GT3 Motorhome 16,000 GVWR

2008 - 2010 Four Winds Hurricane Motorhome 16,000 GVWR

2011 - 2020 Thor Hurricane Motorhome 16,000 GVWR

2018 - 2018 Winnebago Intent Motorhome 16,000 GVWR

2006 - 2019 Coachmen Mirada Motorhome 16,000 GVWR

2013 - 2019 Coachmen Pursuit Motorhome 16,000 GVWR

2018 - 2018 Coachmen Pursuit Precision Motorhome 16,000 GVWR

2009 - 2011 Monaco Riptide Motorhome 16,000 GVWR

2006 - 2017 Winnebago Sightseer Motorhome 16,000 GVWR

2008 - 2016 Itasca Sunova Motorhome 16,000 GVWR

2008 - 2016 Itasca Sunstar Motorhome 16,000 GVWR

2016 - 2017 Winnebago Sunstar Motorhome 16,000 GVWR

2015 - 2015 Itasca Tribute Motorhome 16,000 GVWR

2007 - 2017 Winnebago Vista Motorhome 16,000 GVWR

2008 - 2010 Four Winds Windsport Motorhome 16,000 GVWR

2011 - 2020 Thor Windsport Motorhome 16,000 GVWR

2012 - 2020 Thor ACE Motorhome 18,000 GVWR

2008 - 2019 Holiday Rambler Admiral Motorhome 18,000 GVWR

See All Vehicle Fits



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-1139-146

Average Customer Rating:  4.9 out of 5 stars   (27 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-1139-146
by:
Roadmaster

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-1139-146
by:
2018 Ford F-53

Arrived on time and is now installed. Made all the difference in the world. No more white knuckles. Don't even think twice about this upgrade! Just do it !!! Also installed the Roadmaster RSSA........ 604984



- RM-1139-146
by:
2015 Ford F-53

The trial run proved to be very satisfactory. The product delivered a stable ride and in a cross wind was very effective in keeping the unit from swaying. Very comfortable drive. 529530



- RM-1139-146
by:
2015 Ford F-53

Waiting to have it installed 465936



- RM-1139-146
by:

We received the product earlier than expected, which was a good thing. After watching the videos on how to install the rear sway bar and front steering stabilizer i'm ready to make this easy install (according to the videos). Now I'm not a gearhead or mechanic but I know my way around tools. The first problem I encountered with both products, which the videos just skim over, is taking out the existing nuts and bolts that are rusted together. This task requires an impact tool connected to a 50 gallon air compressor that will supply a constant 90 psi at the tool. The bottom installation line is, if you're not already geared for this type of work, send it out. The product should have 5 stars but because of the missing info in the instructions I give it a 3. 569765



- RM-1139-146
by:

Great product. Helped take the sway out of my motorhome. 728771



- RM-1139-146
by:
2013 Fleetwood Storm Motorhome

Was ready to improve handling of my Class A. I was pleasantly surprised with the improved handling with front and rear sway bars, sumo springs and a steering stabilizer. 725085



- RM-1139-146
by:

Quick delivery and pretty straightforward installation except I had to enlarge some holes in order for the bolts to fit. 719920



- RM-1139-146
by:
Roadmaster

I ordered front and rear roadmaster sway bars, front and rear sumo springs and a Roadmaster steering stabilizer for my 2019 Winnebago Vista 29VE after I picked it up several weeks ago. The drive home was a nightmare trying to keep it on the road. I received all the parts in good shape except the rear sway bar came in with the package all beat up and only had the sway bar not any of the other needed brackets and bolts. I called etrailer and explained the situation, sent pictures of the box and they mailed ma a whole new set immediately not even waiting for UPS to pick up the original one. My son and I installed all of them in my driveway and what a difference! The RV is now sound going down the road even in cross winds and large trucks passing by. Thank you etrailer. 713881



- RM-1139-146
by:
2019 Winnebago Adventurer Motorhome

Easy to install per instruction sheet and on line videos by etrailer if needed. The engineers did a nice job of using existing bolt holes on chassis to mount the kit brackets, no drilling needed! 697685



- RM-1139-146
by:

Great product, easy to install. Use bottle jack as second set of hands to line up bolt holes. Hardest part was getting under the coach. 696483



- RM-1139-146
by:

Huge difference in the handling on the test drive. Can't wait to try it out on the freeway 665386



- RM-1139-146
by:

I’m so happy I purchased this setup! It was very easy to install and made such a big difference in the handling of my motor home. It’s a joy to drive now. 646595



- RM-1139-146
by:
Roadmaster

The roadmaster anti sway bar is a great product! Although I had someone else install it, it looked like an easy and clean install. It improved the drive ability and handling of our RV tremendously. I highly recommend this product to anyone driving a class A Rv. 646393



- RM-1139-146
by:

Great service highly recomend 640554



- RM-1139-146
by:

Holy Buckets, what a great operations to deal with. I ordered two separate parts for my RV. One of them was the wrong fit. I can not honestly say I was not part of the issue, not sure. But it did not matter who messed up." etrailer" stepped up to the plate for a grand slam. Sent me a return label for an expensive freight bil immediatelyl, and had me the replacement part in 24 hours. Never in my 72 years of being a driveway mechanic have I received such courteous and full filling service.. 5 STARS???? Hell no, 10 STARS all the way. Thank you etrailer and your entire staff. 634903



- RM-1139-146
by:

Had it installed. Work great stop a lot of sway 629508



- RM-1139-146
by:

The sway bar and bushings have worked wonderfully. I now am able to keep the motor home in my lane of travel when the wind is whipping it good or when the big trucks pass. Working with etrailer.com was easy as pie, great people all the way around. 622074



- RM-1139-146
by:
Thor

I purchase a sway bar a year ago and install them on a Thor class RA RV, let me tell you. I drove to Floria from El Paso TX and I have no idea why the manufacturer doesn't install them to start with. It improved my ride by 100%. Thanks to the experts at etrailer for the recommendations. 614528



- RM-1139-146
by:

Products (3 items) were shipped the same day I ordered and tracking of the order was exceptional. Customer service can't be beat. I asked questions via email and received a phone call from a tech to answer those questions. Possibly the best company I've ever dealt with when it comes to online purchases. 601013



- RM-1139-146
by:
2018 Winnebago Intent Motorhome

Product looks complete. Have not installed yet. 599868



- RM-1139-146
by:
2013 Ford F-53

We were wanting to improve steering and ride on our 2013 Itasca Sunstar Motorhome. Crystal at Etrailer.com work with me to select the correct parts to upgrade the front sway bar, add a rear sway bar, add a steering stabilizer and Sumo Springs. McGee Commercial Tire & Service in Fort Myers, FL installed all the parts with a little over 9 hours of labor. Test driving the changes in a brisk cross wind showed us a much better ride, a more sold feel to the rig and better steering. All the parts arrive in a couple days and all were the correct parts for our unit. McGee did a very professional job of installation and I could not be happier. 590518



- RM-1139-146
by:
2017 Ford F-53

I have a 30 ft class A Thor Hurricane. It bounced everytime I drove over a hump in the road. Very difficult to handle especially when going around a turn while bouncing. The sway bar completely got rid of the bounce! Everyone I know who drives a large motorhome swears by the sway bar. I dont understand why they dont come standard installed?? When spending 100 grand on a coach, slap on another grand and make the thing drivable! This is a must have! I highly recommend this product! 586166



- RM-1139-146
by:
2018 Ford F-53

Huge difference in the ride with the anti sway bars added to the front and rear 568358



- RM-1139-146
by:
2008 Chevrolet Silverado

My dealer told me he could not get the part before the end of JULY. Went online and found etrailer. Got the part in two weeks as promised. Installed by my dealer the same day. They really care about taking care of your needs. Continually kept me up to date on the delivery as well. Super people. Thanks to all. 522192



- RM-1139-146
by:
2017 Ford F-53

This sway bar made a huge difference in the amount of rock and roll our new coach used to do. 509656



- RM-1139-146
by:
2016 Thor Windsport

I received the sway bar quickly and it was packaged well. I had it installed locally. Although I only drove my Class A motor coach home a few miles, I could easily a difference in the ride...turns and some small potholes in the road that would normally send my rig rocking back and forth were much more stable. Can't wait to take it on a long ride. 474813


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Ask the Experts about this Roadmaster Anti-Sway Bars

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


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  • Recommended Anti-Sway Bar and Steering Stabilizer for 2015 F53 Chassis Motorhome
  • On your 2015 Thor ACE motorhome on Ford F53 chassis, the size of the vehicle often will have the effects you mentioned. The best solution is to add Anti-sway bars and a steering stabilizer. I recommend adding the Roadmaster Rear Anti-Sway Bar for Motor Homes # RM-1139-145 first as the rear sway is what you feel the most when crosswinds and passing semi trucks come and this model is the correct fit for your vehicle weight. This system mounts to the rear axle and the frame to balance the...
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  • Comparing Rear Anti-Sway Bars for a 2017 Winnebago Vista 31BE
  • Roadmaster rear anti-sway bar # RM-1139-146 will fit models with a gross vehicle weight rating of 15,700, 16,000, or 18,000 lbs. It fits coaches which are less than 34 feet long. It does not fit the Thor Outlaw which isn't a factor since you have a Winnebago. Bar # RM-1139-145 fits models with a gross vehicle weight rating of 20,500 pounds but does not fit the Thor Outlaw. Also this model fits only if the shock mounts are parallel to the ground and have two holes. I checked with Winnebago...
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  • Sway Bars and Steering Stabilizer Recommendation for 2018 Thor Hurricane Ford F-53
  • Your 2018 Thor Hurricane is built on a Ford F-53 chassis. For the front of your motorhome, I recommend the Roadmaster Front Anti-Sway Bar # RM-1139-140 and for the rear you can use the Roadmaster Rear Anti-Sway Bar # RM-1139-146 if your Hurricane is a 27B, 29M, 31S, or 31Z. If you have the higher rated 34J, 34P, 35M, or 34R you'd need the # RM-1139-149 for the rear and the same # RM-1139-140 mentioned earlier for the front. For a steering stabilizer for either you'd want the part...
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  • Comparing Rear Anti-Sway Bars for a 2018 Thor Hurricane
  • Rear anti-sway bar # RM-1139-145 will fit a 2018 Ford F-53 chassis with a gross vehicle weight rating of 20,500 pounds. Rear anti-sway bar # RM-1139-146 will fit a 2018 Ford F-53 chassis with a gross vehicle weight rating of 15,700 pounds, 16,000 pounds, or 18,000 pounds. It also only fits coaches that are less than 34 feet long and does not fit the Thor Outlaw. Since you have a gross weight rating of 22,000 pounds you would actually need # RM-1139-149. I have linked a video showing...
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  • Can I Install Roadmaster Rear Anti-Sway Bar Upside Down
  • Roadmaster Rear Anti-Sway Bar part # RM-1139-146 can only be installed in one orientation. It is not designed to be installed upside down. I have attached a photo of what the installation should look like.
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  • Correct Roadmaster Sway Bars for 2015 Thor ACE 27.1 Motorhome
  • Based on my research your 2015 Thor ACE 27.1 is built on the Ford F-53 chassis. I checked with Roadmaster and for your Thor ACE that features a GVWR of 16,000 pounds the correct sway bars are indeed the part # RM-1139-140 for the front axle and # RM-1139-146 for the rear axle. Both of these components will do an excellent job of keeping the RV in line during travel and just improving the overall driving experience on the road by adding stability and control. I have attached a couple...
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  • Recommended Anti-Sway Bars and Steering Stabilizer for 2019 Jayco Alante on Ford F-53 Chassis
  • The best way to enhance the ride of your 2019 Jayco Alante which was built on a 2018 Ford F-53 chassis is to add a rear anti-sway bar. After that you can further improve the ride by adding a front anti-sway bar and steering stabilizer; the combination of these three parts will dramatically increase the handling and comfort of your motorhome, allowing you to enjoy your time on the road instead of exhaustively attempting to keep your rig centered at all times. You did not mention the model...
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  • How to Pick Out Roadmaster Rear Sway Bar for Thor Ace 30.2 Rear Sway Bar
  • In order to determine the correct rear sway bar for your 2017 Thor ACE 30.2 on a Ford F-53 chassis, you will need to take a look at the rear shock mounts. If the rear shock mounts have two holes and are parallel to the ground (see photo) then you will want to use part # RM-1139-145. If the rear shock mounts do not look like this then you are going to want to use part # RM-1139-146. I called my contact at Roadmaster to confirm this. I believe the shock mount difference is what your installer...
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Info for this part was:

Edited by:
Lindsey S
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Installed by:
Jeff D
Video Edited:
Joshua S
Video Edited:
Jacob T
Video Edited:
Dustin K
Test Fit:
Randy B
Test Fit:
Robert C
Test Fit:
David F
Written by:
Shelly K
Video by:
Zach D
Video by:
Jonathan Y
Updated by:
Hannah L
Updated by:
Isabelle B

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