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-1139-146
lowest price pledge
Retail:$912.50
Our Price: $707.15
You Save: $205.35
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: 63 lbs
Quantity: 
In Stock
Roadmaster Anti-Sway Bars - RM-1139-146
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

In Use/Installed

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-1139-146 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 (416)
  • Q & A (77)
  • Videos (13)
  • Photos
  • Why etrailer?

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 Lifetime 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

Installation Details RM-1139-146 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-1139-146

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-1139-146
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:
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:
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

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:

I ordered suspension upgrades for our motorhome. The price was the best I found. The ordering was fast and simple. The delivery was in two days. You can’t ask for better service than that. 740058



- RM-1139-146
by:
Roadmaster

I ordered the SumoSprings and Roadmaster Anti-sway bars front and rear. Install was straight forward and results were better that expected. 730749



- 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


Comments
Still works great. Very noticeable improvement handling.
Kevin - 01/29/2020

64977

- 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


Comments
We continue to be very pleased with the improvement in ride and steering of our motor home since the parts were added. It has made our travel more comfortable and safer due to the improvement in steering and stability.
Ronald - 12/15/2019

63833

- 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


26
450
Show More Reviews

Ask the Experts about this Roadmaster Anti-Sway Bars

  • Recommended Components To Improve Handling of 2017 F53 Chassis Motorhome with GVWR of 18,000
    The best way to adjust handling on your 2017 Ford F53 18K chassis is to start with anti-sway bars. I recommend starting in the back with the Roadmaster Rear Anti-Sway Bar for Motorhomes # RM-1139-146. Then I recommend the Roadmaster Front Anti-Sway Bar # RM-1139-140. These will help the handling by reducing body roll and diminishing the effects of crosswinds and shifting cargo by balancing the weight transfer. Then to assist with keeping your motorhome in line, I recommend the Roadmaster...
    view full answer...
  • Best Way to Reduce Sway and Body Roll on 2019 Winnebago Intent Built on Ford F-53 Chassis
    You are certainly not alone in looking for a way to reduce the amount of sway and body roll when driving a motor home but there are great solutions to remedy those white-knuckle moments when going side-by-side with a semi or meeting crosswinds. The best way to reduce the sway and enhance the ride of your 2019 Winnebago Intent 29L built on a Ford F-53 chassis is to add a rear anti-sway bar, followed by a front anti-sway bar, and after that a steering stabilizer. For your motor home the...
    view full answer...
  • Recommended Anti-Sway for 2018 Forest River FR3 on Ford F-53 Chassis
    For your 2018 Forest River FR3 Motorhome on Ford F-53 Chassis, I recommend using the Roadmaster Rear Anti-Sway Bar for Motorhomes # RM-1139-146 if your model has a Gross Vehicle Weight Rating of 18,000 lbs or under. For the front, I recommend using the Roadmaster Front Anti-Sway Bar for Motorhomes # RM-1139-140 if your chassis is up to 16,000 lbs, but if it is 18,000 then use the Roadmaster TruTrac Front-Axle Trac Rod # RM-TRAC-F550.
    view full answer...
  • Front and Rear Anti-Sway Bars for Class A Motorhome on Ford F-53 Chassis
    You will get the best handling improvement in your Forest River Class A motorhome by installing aftermarket anti-sway bars and an axle stabilizer. These will do the best job of reducing the effects of wind gusts and air blasts from passing trucks and help prevent you having to fight the steering wheel. The Forest River Georgetown Class A motorhomes are built on the Ford F-53 chassis. For both the V8 and V10 versions you can use rear anti-sway bar # RM-1139-149 from Roadmaster along with...
    view full answer...
  • Recommended Anti-Sway Bars & Steering Stabilizer for 2016 Forest River FR3 28DS on Ford F53 Chassis
    Your Forest River FR3 28DS has a V10 and has a GVWR of 18,000 lbs. Because of the weight being in-between our fit guide weights, I reached out to my tech contact at Roadmaster to confirm that the Rear Anti-Sway Bar you need is # RM-1139-146. For your Front Anti-Sway, you will want # RM-1139-140. These anti-sway bars will work well with your motorhome to balance the weight transfer and reduce body roll. It also diminishes the effects of crosswinds, shifting cargo, and passing vehicles. Finally,...
    view full answer...
  • Recommended Sway Bar and Trac Rod for 2011 Forest River Georgetown Motorhome
    For your 2011 Forest River Georgetown Class A Motorhome with V10, you have a Ford F53 chassis and the Triton engine so I have exactly what you need. There are a few products that will greatly help with your handling and sway control, so I'll give them in the order that will give you the most help, but both can be used together for the best ride. I recommend first installing the Roadmaster Rear Anti-Sway Bar for Motorhomes # RM-1139-146. This product is rated for your GVWR and fits coaches...
    view full answer...
  • Rear Anti-Sway Bar for 2017 Thor Motor Coach Hurricane 31S With 2016 Ford F53 Chassis
    Yes, the Roadmaster Rear Anti-Sway Bar for Motor Homes, # RM-1139-146 will work on your 2017 Hurricane 31S with the 2016 Ford F53 Chassis with either a V8 or a V10. The anti-sway bar will use the weight of the axle as a brace against the chassis so that pressure to one side of the motor home is countered by the sway bar. It minimizes the side-to-side movement that cargo shift, wind or passing trucks can cause. On some applications longer u-bolts are required to install this kit. For...
    view full answer...
  • Front And Rear Anti-Sway Bar and Steering Stabilizer for 2016 Fleetwood Flair On Ford F53 Chassis
    I recommend the Roadmaster Anti-Sway Bar part # RM-1139-146 for the 2016 Fleetwood Flair on the Ford F53 Chassis with 16,000 lb GVWR. Everything you need to install the Anti-Sway bar is in the kit. You do not need U-bolts with this kit because it does not install with U-bolts on the F35 chassis as confirmed by Roadmaster. I recommend the Roadmaster TruTrac Front-Axle sway bar part # RM-TRAC-F550 for the front of the Fleetwood. It also comes with everything you need to install. The...
    view full answer...
  • Correct Sway Bars and Steering Stabilizer for 2019 Georgetown 30X3
    Thank you for all that information and I can confirm that the Roadmaster Rear Anti-Sway Bar # RM-1139-146 is a fit for your 2019 Georgetown 30X3 built on a Ford F-53 chassis with an 18,000 lb GVWR and V10 engine. A rear sway bar is going to be the best way to enhance the ride of your motorhome because they are a vast improvement over the OEM sway bars and their placement at the rear of the vehicle allows for maximum efficiency in terms of better overall handling. If you are looking...
    view full answer...
  • Sway Bar for 2018 Thor A.C.E. Built on Ford F-53 Chassis
    The rear anti-sway bar that fits your 2018 Thor A.C.E. that was built on a Ford F-53 chassis is the Roadmaster Rear Anti-Sway Bar # RM-1139-146. This sway bar works on a chassis with a GVWR of 15,700, 16,000 or 18,000 lbs; your RV has a 16,000 lb chassis which makes this sway bar a fit.
    view full answer...
  • 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...
    view full answer...
  • 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.
    view full answer...
  • Best Rear Anti-Sway Bar for a 2018 Forest River FR3 30DS
    The correct rear anti-sway bar for your 2018 Forest River FR3 30DS is the Roadmaster Rear Anti-Sway Bar for Motorhomes part # RM-1139-146. Your coach has a gross vehicle weight rating (GVWR) of 18,000 lbs which is why this is the correct anti-sway bar for you. The Roadmaster Rear Anti-Sway Bar for Motorhomes part # RM-1139-145 that you referenced only works with coaches that have a 20,500 lb GVWR which would be the Forest River FR3 32DS.
    view full answer...
  • 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...
    view full answer...
  • 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...
    view full answer...
  • Best Ways to Reduce Sway from Semi Trucks Passing with 2015 Thor Ace 29.2
    The biggest improvement you are going to make to the sway you are experiencing when passing semi trucks and overall handling is going to be with a rear sway bar. So Cathy for your 2015 Thor Ace 29.2 the correct kit is the part # RM-1139-146. Next biggest improvement you'll make is with a front bar part # RM-1139-140. For motorhomes these modifications make the best improvements over everything else. You said you installed stabilizers on the front and rear of the motorhome which I'm...
    view full answer...
  • Recommendation For Improving Control And Stability For Thor ACE 30.2 On 2015 Ford F-53 Chassis
    We have several options to enhance the performance of your Thor Ace 30.2 RV built on the 2015 Ford F-53. These options are more robust in their design and have features that intentionally provide greater stability and control than OEM parts. Because there are different configurations for your Thor Ace, you need to select options that work with your particular package (see owner's manual or contact manufacturer). For your 2015 Ford F-53 chassis, I recommend starting with a Roadmaster...
    view full answer...
  • Would Installing Roadmaster Rear Anti-Sway Bar # RM-1139-146 Ever Require Longer U-Bolts
    The Roadmaster sway bar part # RM-1139-146 does not require the optional longer u-bolt set like some of the other sway bars might need.
    view full answer...
  • Sway Bar Recommendations for 2015 Thor ACE 29.2 to Reduce Sway
    The best improvement you can make to your 2015 Thor ACE Class A motorhome built on a Ford F-53 chassis will be a rear sway bar. For that you'd want the part # RM-1139-146. The next biggest improvement you'll see is with a front sway bar. For that you'd want the part # RM-1139-140. I attached install videos for both bars for you to check out as well. With either just the rear bar or with the front and rear bar you'll see a drastic improvement!
    view full answer...
  • Rear Anti-Sway Swaybar Recommendation for 2015 Thor ACE 29.2 Motorhome
    I recommend going with the Roadmaster Anti-Sway Bars for the Ford F-53 Chassis, # RM-1139-146. The bar on this anti-sway system mounts to the rear axle and to the frame of your 2015 Thor ACE 29.2 motorhome to balance weight transfer, minimize sway, and reduce body roll.
    view full answer...
  • Recommended Rear Anti-Sway Bar for 2016 Thor ACE 29.3 on F53 Chassis
    For your 2016 Thor Ace motorhome on F53 chassis, the Roadmaster Rear Anti-Sway Bar for Motorhomes # RM-1139-146 is the correct fit for an 18,000 lb GVWR. Adding the rear anti-sway is the most effective option to help control body roll and sway. If in the future you want to add even more stability, I recommend the front Anti-Sway # RM-1139-140 and the Steering Stabilizer # RM-RBK22-RSSA. These will help with further support and stability to increase the ride and driving comfort. I've...
    view full answer...
  • Rear Sway Bar Recommendation for 2015 Thor ACE Motorhome
    I recommend going with the Roadmaster Anti-Sway Bars for the Ford F-53 Chassis, # RM-1139-146. The bar on this anti-sway system mounts to the rear axle and to the frame of your 2015 Thor ACE motorhome to balance weight transfer, minimize sway, and reduce body roll. A rear sway bar upgrade is the biggest improvement you can make for the ride quality of a F-53 motorhome chassis.
    view full answer...
  • What is the Correct Roadmaster Rear Anti-Sway Bar for a 2012 Thor ACE
    The reason I believe you are finding conflicting information as to what is the correct Roadmaster Rear Anti-Sway Bar for your 2012 Thor ACE is because there are two different options, one with a 1-1/2" diameter bar and one with a 1-5/8" diameter bar. The correct diameter bar to use will be based on the gross vehicle weight rating (GVWR) of your motorcoach. I looked up the GVWR of your Thor ACE online and they all have a GVWR of 16,000 lbs therefore the correct rear anti-sway bar for you...
    view full answer...
  • Recommendation For Improving Control And Stability For 2016 Coachman Mirada Class A RV
    We have several resources and kits to enhance the performance of your F-53 based 2016 Coachman Mirada Class A RV. Because there are different configurations for your Coachman Mirada, you need to select options that work with your particular package (see owner's manual or contact manufacturer). For your Ford F-53 chassis, I recommend starting with a Roadmaster Rear Anti-Sway Bar Kit, Item # RM-1139-146. This replaces your stock sway-bar with a stronger 4140 chromoly steel unit. This...
    view full answer...
  • Available Anti-Sway Bars and Steering Stabilizers for 2013 Ford F-53
    The link provided will take you to our main page for all anti-sway/stabilizing products for the 2013 F-53. You can use the drop-down menu at the top of the page to select your engine size (V8 or V10) to then see the front- and rear-end products available for your vehicle. You can use the filter at the left-hand margin to separately review front- and rear-end kits. Some of these products are add-ons to existing factory components while others are complete new assemblies. Some are...
    view full answer...
  • How Do I Correct Sway From Crosswinds and Passing Trucks on 2019 Entegra Vision 26X Motorhome?
    This isn't uncommon to have this, but there are several products that can help enhance the factory suspension system on your 2019 Entegra Vision 26X combat what you're currently dealing with. The biggest improvement can be made by upgrading the rear sway bar on your Entegra, which will work to stop sway at the rear of the vehicle from crosswinds and passing semi-trucks. Since the Entegra Vision 26x is built on a Ford F-53 chassis, you'll need the Roadmaster Rear Sway Bar # RM-1139-146 ....
    view full answer...
  • Which Rear Sway Bar Fits 2008 Winnebago Vista 30B 18000 GVWR
    Yes, when picking out a rear sway bar for a motorhome like your 2008 Winnebago Vista 30B it is important you match the GVWR of the MH to the sway bar. The # RM-1139-146 is the correct fit and would be what you need. If you go with a higher rated sway bar it will give you a harsher ride quality than you'd want so it's not recommended.
    view full answer...
  • Recommended Roadmaster Rear Anti-Sway Bar for 2017 Winnebago 29VE Motorhome
    Your 2017 Winnebago 29VE with the 2016 Ford F53 chassis has a GVWR of 18,000 lbs. Based on this the correct fit is the Roadmaster Rear Anti-Sway Bar for Motorhomes # RM-1139-146. The Roadmaster # RM-1139-145 is a fit for vehicles with a GVWR of 20,500 lbs, so it is not the correct fit for your specific motorhome.
    view full answer...
  • Rear and Front Anti-Sway Bars Plus Steering Stabilizer for a 2014 Winnebago Vista 31KE
    For rear and front anti-sway bars on your 2014 Winnebago Vista 31KE with the 16K GVWR you need the parts # RM-1139-146 and # RM-1139-140 respectively. Then for a steering stabilizer you need part # RM-RBK22-RSSA. I have attached some videos that you can check out as well.
    view full answer...
  • Which Rear Sway Bar Fits 2018 Thor Ace 30.1 Class A Motorhome
    I looked up info on your 2018 Thor ACE 30.1 and since it has a GVWR of 18,000 lbs the correct rear sway bar is the part # RM-1139-146. I attached an install video for this on a 2018 Thor Ace just like yours for you to check out as well.
    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:

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

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.