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

Roadmaster Rear Anti-Sway Bar - 1-1/2" Diameter

Item # RM-1139-145
Retail:$903.58
Our Price: $794.60
You Save: $108.98
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 RM-1139-145 or order online at etrailer.com. Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Roadmaster Rear Anti-Sway Bar - 1-1/2" Diameter. Anti-Sway Bars reviews from real customers.
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Roadmaster Anti-Sway Bars - RM-1139-145

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


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 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


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.



1139-145 Road Master Anti-Sway Bar - Rear

Installation Details RM-1139-145 Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Roadmaster Rear Anti-Sway Bar - 1-1/2" Diameter - RM-1139-145

Average Customer Rating:  4.8 out of 5 stars   (1716 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.

by:

The install went very well. The videos really helped, The improvement was very noticeable. I bought the front one can't wait to take her for a spin.

Kevin

8/6/2023

A great deafferents the rear sway bar. has made. So I bought the front one.



by:

Great product. Fairly easy to install. Instant results in the driving quality of the coach.



by:

Delivery was fast and great.Paula S is a very excellent person to have working for your business She was very helpful in helping me out getting the right parts and fun to talk to. Thanks again for your help.



by:

Once again e-Trailer exceeds our expectations! Their customer support is top notch! Kyle was very helpful with our order and followed up with an email to also advise us our delivery was made today along with helpful videos.
We can’t wait to get front & rear sway bars installed on our Class A Motorhome!

Randy P.

12/7/2022

Whow! What a great product! Makes driving our class a Motorhome so much more enjoyable,



by:

I think the anti-sway bar is the most noticeable. When I'm turning out of my driveway where there is a dip as I go over the curb-cut, for example, the sway seems limited moreso than before. As for the steering stabilizer, I think the RV seems a little harder to turn at a slow speed, but I don't notice a lot of difference in it's "springing back to straight" as I'm going down the highway. Some of that may be due to the crown of the road. I'm anxious to try it on the interstate to see if it is better there.

Well, I drove on a smooth, level Interstate with a tailwind, and it handled like a dream.

Bottom line, the biggest difference in driving is the wind and the road surface. These components probably help a little, but I'm not sure it was worth the cost. I'd like to think the RV handles a little better, but I'm not sure that isn't because I want it to after spending the $$$ for these upgrades.



by:
2005 Pontiac G6

While not the transcendent experience some of the other users had, this did make a noticeable difference. My star rating represents a product doing exactly what it was supposed / advertised to do.
I was told the rear anti sway-bar would eliminate 65% of the movement. And that is an accurate description of the improvement. It was most noticeable on uneven roads and highway ramps. When the coach would have rolled 3-4 times, it's now 1 time. And, on long sustained curves the degree of roll is less.
I paid to have it installed. After looking at it installed, it would have been easy to do on my own.
I recommend the anti sway-bar for anyone looking to reduce body roll.



by:
2008 Ford F-53

This part was absolutely the right pick. I researched a lot of anti-sway products and this one came out on top due to its simple installation (thanks to the etrailer video), price and support from etrailer. It went on just like the video showed, though I had to use an impact wrench for the chassis bolts, the etrailer guy who used a wrench must be a beast. Definitely a DIY project even for novice mechanics. I test drove it and it was hands down the biggest improvement in ride even though I had put on new shocks and have air bags. etrailer is my go-to for nearly everything I do to my RV.



by:
2016 Ford F-53

I thank Cathy T great help she gave me.
I installed the front and back anti sway bars on my 2016 George Town Motorhome. It has the ford f-53 chassis and a Dana 150 rear end. I use road master RM-1139-145 on the rear and
RM-1139-140 on the front. Thanks to Cathy T she set me up with the right parts.
I don't have any more body roll and the 18 wheelers bearly push me over now. If not at all. I also have the road master reflex steering stabilizer Rm-BK9-RSSA.



by:

Only thing that looked wrong was the package was taped pretty good, was it shipped that way.



by:
2008 Ford F-53

Winnebago vista. This was easy to install. The additional sway control in the rear is the most noticeable of the three improvements I did. They weren't the lowest price I could find. But they did have all three items. The shipping was quick. The installation videos were very helpful. I used my leveling jacks to assist in installing the frame brackets.



by:

I put both sway brs on today with help from my friend. They went just

as the paper work said, except for the front. You only replaced two of the bolts holding on the bushing brackets. We just reused two of them. Everything seemed to work great on our test drive. I just took
a picture of the front sway bar because the rock guard was in the way of a decent pic. Everthing went great.



by:
2013 Ford F-53

Very well constructed fit and finish are top of the line. I have not tried this yet because I need a 21mm crows foot wrench for my torque wrench(200 ft-lb) for the cross tube bolts.
I am hoping that it will minimize fishtailing from our tow car, as well as controlling sway.



by:

very happy with the product and with Etrailer. Anyone who owns one of these motorhomes realizes it's a step by step process to get it have decent ride characteristics, and adding sway bars and trac bars and steering stabilizers are all part of it in a step by step process. Every little bit helps!

Greg S.

4/13/2022

Its all good, its still like driving a saltine box down the road, but it has definite improvement over stock configuration of the f53



by:
2006 Ford F-53

I live in the same town as the Road Master factory, so I stopped by to see what I needed for my 2006 HR motorhome.
Then I went home to order from E-Trailer to save almost $400 below the factory prices on the two sway bars. Yes I'm very happy with E-Trailer!



by:

Made a tremendous difference in the rid e.



by:
2018 Forest River Georgetown GT5 Motorhome

Item was delivered early and very well packed



by:

I had the pleasure of dealing with Daniel W.and I must say his customer service was very good and received my order a head of time.I must rate his service a 5 star and looking forward to my next purchase real soon. Thanks Daniel for your continued great customer service.



by:
Pontiac Trans Sport Van

If you are thinking of doing some distance comfortably with your motorhome, then sway bars are for you. No more stress when you experience side winds or passing transport trucks!



by:

Well worth the money. I installed aftermarket front and rear ant-sway bars on my FR32. Great support from emailed as well in the selection process. They actually answer the phone and take the time to walk you through the process. The reason I am taking the time to write this review is directly because of their 1 year follow up email. Kudos etrailer!



by:
2019 Forest River Georgetown 5 Series GT5 Motorhome

Excellent quality, good prices and great shipping ! Thanks



by:

The sway bars improved the steering on the motorhome and provided a very stable ride with no sway.



by:

I just spent several hours trying to install RM1139-145 only to find that I have again ordered the wrong item. Now I can not return the item this time because I do not have the original carton the item came in. The box went out with the trash before I got to start the install procedure.

Oh well, just several hundred dollars wasted.... We will just eat light and cancel a few camping trips for a couple months...

We will survive without the Anti-Sway Bars while the camper is parked in the driveway.



by:

Promptly shipped. Correct item. etrailer did good.

Road Master however packaged the parts for the sway bar poorly. In particular, they put a little cup of the grease for the bushings in a bag along with large bolts/nuts/washers without a lid. The grease got everywhere. This is not an etrailer issue obviously, but this is the 2nd time in 2 weeks I saw Road Master mess up on their packaging (the 1st time, the entire box with the sway bar mounting hardware was missing). Road Master needs to have better outgoing Quality Control.



by:

Rear sway bar made a big difference in body lean and roll. Motorhome is much more stable.. I also added Sumo springs on all corners. I put sway bar on first and it made a big difference.



by:

This is in response to installing my anti-sway bar. While checking out the procedure for installing my Road Master anti-sway bar, I found out why I needed one, the original anti-sway bar "U" clamp was broken rendering the original sway bar useless. After repairing the original sway bar, myself and my neighbor which is a mechanic began installing the new anti-sway bar. First of all, you will definitely need an IMPACT WRENCH to remove the four bolts on the frame to install the mounting brackets. These bolts were put on with an impact wrench and put there to stay. After installing the mounting brackets everything else went smooth. Two people will be needed to install the large sway bar due to the weight of the bar. Now I have two sway bars, the original equipment and the Road Master. As far as how the equipment will work I will let you know as I will be leaving the 19th September for a month-long trip through AL, MS, LA, Texas, New Mexico, AZ, Okla, MO, AR, then back to FL.


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Show More Reviews

See what our Experts say about this Roadmaster Anti-Sway Bars

  • Rear Sway Bar Recommendation for 2019 Forest River FR3
    The correct rear Roadmaster sway bar for your 2019 Forest River FR3 built on a Ford F-53 chassis is the Roadmaster part # RM-1139-145 that you referenced. I confirmed this with Roadmaster. I also attached an install video for this for you to check out as well.
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  • Does the Roadmaster Rear Anti-Sway Bar # RM-1139-145 Replace the OEM Sway Bar on Motor Homes
    The Roadmaster Rear Anti-Sway Bar, # RM-1139-145, is designed to retain the factory sway bar on 2006 to 2012 Ford F-35 V10 chassis. This kit comes with all of the hardware that you will need to complete the installation and there is no drilling required to install. I have attached a link to the installation instructions for you to check out.
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  • How to Improve Handling of 2020 Forest River FR3 34DS
    The biggest improvement you can make for the ride quality of your 2020 Forest River FR3 34DS that has a 20,500 lb GVWR is with a rear sway bar. For that you'd want the part # RM-1139-145. This will get rid of that boat feeling you described and will require much less steering corrections. Out of all of the suspension upgrades you can make to your motorhome this will give you the biggest improvement.
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  • How to Improve Ride Quality of 2019 VR Newmar built on F-53 Chassis
    For the Ford F-53 chassis that your Newmar is built on the best modification you can make to improve the ride quality and stability is with an upgraded rear sway bar with the Roadmaster part # RM-1139-145. But this kit only works if the shock mounts look like what I sent a picture of. If the air bag suspension kit is part of the factory suspension it would have to stay but if it was a supplemental suspension enhancement then it could be removed.
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  • How Level Does the Roadmaster Anti Sway Bar Need to be For Installation?
    It's not overly critical no, ideally you'd want your Roadmaster Rear Anti-Sway Bar # RM-1139-145 to be as level as possible so if the lower hole is the closest to level then that would be the one you need to use. There are also two holes in the frame bracket hangar that can be used for additional adjustments if need be. I've included the optimal angle for install for you to reference as well.
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  • Recommended Rear Anti-Sway Bar for a 2014 Newmar Bay Star Sport Motorhome
    For your 2014 Newmar Bay Star Sport MH I recommend going with the Roadmaster Rear Anti-Sway Bar # RM-1139-145 first if you have to choose. Since your coach is rear-wheel drive you'd benefit most from an anti-sway bar for the rear. Obviously adding the front anti-say bar would only further improve handling, but if you need one now and can't get both, the rear is what I'd do first.
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  • Fit of Roadmaster # RM-1139-145 Anti-Sway Bar on 2013 Newmar Baystar 2901 on Ford F53 Chassis
    According to my research, your 2013 Newmar Baystar 2901 is on a Ford F53 chassis. The Roadmaster # RM-1139-145 Anti-Sway bar you referenced will indeed fit your motorhome if it's shock mounts are parallel to the ground and have two holes per, you can see a photo of this by using copying and pasting this link: http://roadmasterinc.com/img/1139-145_sm.jpg
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  • Rear Anti-Sway Bar For A 2000 Holiday Rambler With An F53 Chassis
    The Roadmaster Rear Anti-Sway Bar # 1139-144 is a confirmed fit for your 2000 Fleetwood Holiday Rambler with an F53 chassis. This rear sway bar is 1-3/4" in diameter and will help minimize sway and driver fatigue by improving the stability and driveability of your vehicle.
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  • Sway Bars and Steering Stabilizer for 2015 Thor Windsport 32N on Ford F-53 V10 Chassis
    We can help you with handling enhancement kits for your 2015 Ford F-53 V10 motorhome chassis which is rated for a GVWR of 20,500-lbs. The front and rear sway bars and the steering stabilizer together will make a dramatic improvement in the coach's drive-ability. For a front sway bar you need Roadmaster kit # RM-1139-148. For a rear sway bar use kit # RM-1139-145. Both are appropriately rated for your Thor's GVWR. Installation videos for each kit are linked for your reference.
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  • Recommended Rear Sway Bar for a 2017 Thor ACE 29.3 on a Ford F-53 Chassis
    In order to determine the correct rear sway bar for your 2017 Thor ACE 29.3 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 have attached an install video on each sway bar for...
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  • 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.
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  • Which Rear Sway Bar for 2015 Winnebago Vista 35B on a 22k For F-53.
    You are right at the weight (22K) that means you can use either the part # RM-1139-149 which is for 22-24k motorhomes or the part # RM-1139-145 which is for 18-22k motorhomes. You can use either, but the higher rated one might be a bit stiffer feeling.
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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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  • Rear Sway Bar Upgrade that Fits 2013 Newmar Bay Star Motorhome
    For your 2013 Newmar Bay Star the correct rear sway bar is the Roadmaster part # RM-1139-146 since your GVWR is 18k. All of our prices are in US dollars. I attached an install video for the sway bar for you to check out as well.
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  • Sway Bar Recommendation for RV Built on 2016 Ford F-53 Chassis
    To improve the ride quality of an RV built on a Ford F-53 chassis like what you have the best solution is going with a better rear sway bar. So for that you'd want the part # RM-1139-145 which is a confirmed fit. Next a front sway bar would make the next best improvement with part # RM-1139-148.
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  • How to Improve Handling and Stability of 2020 Forest River FR3 34DS
    While we don't have a rear track bar that fits your 2020 Forest River FR3 34DS we do have what will make the biggest improvement in handling and stability with the rear sway bar part # RM-1139-145. The next biggest improvement you can make is with a front sway bar part # RM-1139-148. These kits individually would do a better job than a track bar but together will make a huge difference. If you decide to just try one for right now go with the rear bar.
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  • What is correct Roadmaster Rear Anti-Sway Bar for 2018 Coachmen Mirada Motorhome on 22,500 Chassis
    We have what you need, but if your 2018 Coachmen Mirada Motorhome is built on the Ford 20,500 GVWR chassis, the Roadmaster Rear Anti-Sway Bar, # RM-1139-149 is not the correct component. That item is for the 22K chassis. You need the Roadmaster Rear Anti-Sway Bar, # RM-1139-145 for your Ford 20,500 GVWR chassis.
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  • 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-1139-148.
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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 an...
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  • Recommended Front And Rear Sway Bars For A 2020 Thor Chateau 24F Class C Motorhome
    For your 2020 Thor Chateau 24F Class C motorhome you'll need the Roadmaster Rear Anti-Sway Bar # RM-1139-117 and Roadmaster Front Anti-Sway Bar # RM-1139-176. I've attached some installation videos below to help walk you through the process if you plan on installing these yourself.
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  • Recommended Rear Anti-Sway Bar for 2013 Fleetwood Bounder RV without Factory Sway Bar
    Based on my research, your 2013 Fleetwood Bounder RV is built on the Ford F-53 chassis. I do recommend verifying this with the RV's paperwork. I spoke with my contact at Roadmaster regarding the anti-sway bars for your RV. He did say that your best option is to have the factory sway bar fixed or replaced before adding one of their aftermarket models. They are designed to retain the use and work with the factory bar and they just haven't been tested when used as the sole anti-sway bar...
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  • 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.
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  • Better Ride Quality and Handling for a 2015 FourWinds 31L Class C RV on Ford E450 V-10 Chassis
    Ideally we will get you the product that solves the problem you are having. Regular suspension enhancements help some but are not the ideal solution and are often only treating the symptom and not the cause when used on RVs. The single greatest upgrade you can make to the stability and ride quality of your Class C on the Ford E-450 chassis is to install a different rear anti-sway bar, # RM-1139-147. It is going to reduce sway (body roll), soft steering, and wind buffeting. For every 1/8...
    view full answer...


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Info for this part was:

Employee Jackie C
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Jackie C
Employee Michael H
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Michael H
Employee Jameson C
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Jameson C
Employee John H
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John H
Employee Adam R
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Adam R
Employee Jeffrey L
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Jeffrey L
Employee Lindsey S
Updated by:
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Employee Shelly K
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Shelly K
Employee Wilson B
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Wilson B
Employee Isabelle B
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Employee Sabrina W
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Employee Jeff D
Installed by:
Jeff D
Employee Joshua S
Video by:
Joshua S
Employee Kathleen M
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Kathleen M
Employee Jonathan Y
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Employee John S
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John S
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
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Employee Chris R
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Employee Randy B
Test Fit:
Randy B
Employee Brent H
Test Fit:
Brent H
Employee Shane H
Test Fit:
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Employee Robert C
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Employee David F
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