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  1. Anti-Sway Bars
  2. Roadmaster
  3. Anti-Sway Bar
  4. Front
  5. 1-3/8 Inch Diameter
  6. Steel w Polyurethane Bushing
Roadmaster Front Anti-Sway Bar - 1-3/8" Diameter

Roadmaster Front Anti-Sway Bar - 1-3/8" Diameter

Item # RM-1139-189
Retail:$763.73
Our Price: $685.00
You Save: $78.73
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 front 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-1139-189 or order online at etrailer.com. Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Roadmaster Front Anti-Sway Bar - 1-3/8" Diameter. Anti-Sway Bars reviews from real customers.
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Roadmaster Anti-Sway Bars - RM-1139-189

  • Anti-Sway Bar
  • Front
  • Roadmaster
  • 1-3/8 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 front 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 front 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: 1-3/8"
  • 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 front 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.



1139-189 Road Master Anti-Sway Bar - Front

Installation Details RM-1139-189 Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Roadmaster Front Anti-Sway Bar - 1-3/8" Diameter - RM-1139-189

Average Customer Rating:  4.8 out of 5 stars   (1882 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 front axle and to the frame to balance weight transfer and reduce body roll.

by:

Great product…. looking forward to installing this sway bar on my Rv.



by:

Everything that I have ordered, especially this super heavy front sway bar has been of excellent quality! You guys rock! I installed this on our 2019 E450 32 ft moterhome and recycled the factory one. Night and day difference. I love how stable it feels. I am very happy.



by:

Vast improvement in the ride and handling of our RV. Swaybar was simple to install with basic tools. Top quality product.



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

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

So why 4 stars and not 5?

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

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

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

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



by:

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



by:

Fairly easy install. Drilling the hole in the frame was decent started with a 17/64 pilot hole then the 17/32 final hole. Take your time and let the drill do the work.
Do be aware of the hole placement on the drivers side as there are brake lines and wiring there.



by:

Solid-built sway bar. Helps stabilize in wind while driving. Using on 2016 Thor Vegas 25.3 RV, notorious for suspension and driving issues. Using front anti-sway bar as well with Safe-T-Plus steering stabilizer.



by:

Very heavy duty sway bar. Using it on a 2016 Thor Vegas 25.3 RV. Much thicker than original and still holding up fine. Helps to stabilize in high winds and passing trucks. Also added the Safe-T-Plus stabilizer to keep wheels from wandering.



by:

First, Eric was a great help throughout the purchasing and installation. I watched the tutorial numerous times and set up my tools. I bought a 3/4 inch torque wrench at Harbor Freight and a 4 ft galvanized pipe at Home Depot. I followed the instructions and the tutorial to the letter. The bar and mounting plates are heavy, so be very careful. This job isn't for a beginner, but if you are somewhat mechanically inclined, you can install it. The 300 Ft. Lbs torque of the 8 nuts took everything out of me. LOL...I adjusted the end links twice, and it leveled out great. Now, I will do a test run and see how it improves the handling of my motorhome. Its a 2022 Entegra Vision 29S.



by:

This sway bar is the real deal. Easy to follow instructions but I had it installed because I'm lazy. It took one hour labor



by:

OH My! If you are thinking about getting one for your P32 wide body. Please don’t hesitate. It REALLY Works. Take the white knuckle effect out of driving. EASY installation! Easy Ordering from etrailer. Roger helped me get through the buying process and shipped to my house in 2 days! Thank You!!



by:

Haven't opened the stabilizer bars but I did open the Sumo Springs and the Snap Pads. All seemed to be there in good condition.



by:

This should have been original equipment.It ( 1995 Safari Trek) now drives like a completely different vehicle! I added Sumo Springs on the rear .These 2 items together are well the money. I installed both alone by myself (67 years young).



by:

Replaced the anti-sway bar on our 2019 F350. No special tools or jacks needed for the installation. Now our Lance 850 truck camper doesn’t sway nearly as much as before. Big improvement. Very pleased!



by:

I purchased the Roadmaster Rear Anti-Sway Bar about a year ago. I have a 2016 F250 which did not come with an Anti-Sway bar. Why they come with one is crazy.
I have a Slide in Truck Camper and and it made a world of difference. With out it, it felt very rollie. My other truck I had the Hellwig anti-sway bar. It was ok, not as good as the Roadmaster. In my opinion.



by:

The last thing to upgrade my front suspension on my 2018 Winnebago Aspect 27k. Money well spent! Easy installation, the ride greatly improved. Etrailer shipped this fast and I'm very pleased. Thanks.



by:

Major driving experience I upgrades my 2020 Thor Motor Coach KW-29 with front & rear sway bar, front steering stabilizer shock, All 4 front/rear Koni shocks, & Rear End stabilizer to chassis all together best investment on my RV improvement handling, body sway when 18 wheeler passing u up minimizing body sway from minor to none at all, reduce fatigue while driving course correcting steering reducing stress. Each component was felt the improvement but all together it’s been major improvement & experience



by:

The front anti-sway bar made a huge difference with a truck camper. I already had a rear and this helped even more. It stopped the sway from cross winds and trucks passing me. Had to make an evasive manuver when a truck pull out in front of me, it really made a difference.



by:

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



by:

Free from the roller-coaster ride my 2022 thor motorhome had with the factory bars.I have questions about why these companies don't install the suspension while building the rv.



by:

Was told from etrailer that this was going to be a quick plug and play but no this was to be installed on a class c ( no drilling) but no , ustraps had to be adjusted did not fit and struts would not reach had to drill chasis



by:

E trailer is.my go to place for anything towing trailering etc Absolutely the best products as well and the best service and the best people!!!!



by:

After reading all the information regarding fitment for my 2001 Freightliner Chassis I purchased this rear anti sway bar kit which had a side note stating that if your chassis had different u bolts, which my chassis does I could contact Roadmaster engineering direct for the correct parts. I did contact them directly and they referred me to e trailer, who referred me to Roadmaster, pass the buck game. So after a year I have a half installed anti sway bar kit that is useless and unreturnable because it was half installed waiting for answers that never came. A waste of my time and hard-earned money NOT HAPPY.


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

  • What Rear Air Bags and Front Anti-Sway Bar do You Recommend for My 2012 Ford E-250 Van?
    I believe you meant that your have a 2012 Ford E-250 Ecoline van. For this vehicle, I recommend the Air Lift LoadLifter 5000 Ultimate Air Helper Springs with Internal Jounce Bumpers - Rear Axle # AL88138. Along with the 5,000 pound of load-leveling capacity for your van, the LoadLifter 5000 reduces the strain on your rear suspension, increases safety, and compensates for uneven loads. In addition, the air bags help to improve ride comfort, reduce sway, and help with cornering. For greater...
    view full answer...
  • Replacement Bushings for Roaadmaster Anti-Sway Bar on 2016 Ford F-450
    The Roadmaster Front Anti-Sway Bar # RM-1139-189 you referenced only comes as a complete kit. We don't have the bushings or bar available separately. This is the fit for the 2016 Ford E-450 but not the same year F-450 you have in the question fit guide. For the F-450, you would instead use Roadmaster Front Anti-Sway Bar # RM-1139-179. This is a 1-1/2 inch bar and is confirmed to fit.
    view full answer...
  • Roadmaster Anti-Sway Bars for 2014 Fleetwood Jamboree Sport 31M
    You are correct, the rear sway bar part number you need for your 2014 Fleetwood Jamboree Sport 31M Ford E450 is the part # RM-1139-163. Then for the front sway bar you'd want the part # RM-1139-189 and you'd be set. These will make a huge improvement in the ride quality of your motorhome so you'll be really happy with them.
    view full answer...
  • Recommended Front And Rear Anti-Sway Bars For A 2015 Thor Axis 25.2
    Hey Phillip, The 2015 Thor Axis 25.2 sits on a Ford E-350 Class A chassis so you would need the Roadmaster Front Anti-Sway Bar - 1-3/8" Diameter # RM-1139-189 and Roadmaster Rear Anti-Sway Bar - 1-5/8" Diameter # RM83ZR. These would both be simple swap outs without any need for modifications to the chassis in order to install. If you're wanting to also add in a steering stabilizer then you would need the Roadmaster Exact Center Steering Stabilizer for Ford E-Series # RM97MR along with...
    view full answer...
  • Correct Roadmaster Front Anti-Sway Bar for a 2017 Forest River Sunseeker 3010DS
    I checked with Roadmaster, the correct Roadmaster Front Anti-Sway Bar for a 2017 Forest River Sunseeker 3010DS is part # RM-1139-176 which replaces the OEM bar and reuses the factory end links. The Roadmaster Front Anti-Sway Bar part # RM-1139-189 is for emergency vehicle chassis whereas the Roadmaster Front Anti-Sway Bar part # RM-1139-176 is for cutaway chassis which is what you have.
    view full answer...
  • Recommended Steering Stabilizer For A 2022 Entegra Odyssey 30Z Class C Motorhome
    Since the 2022 Entegra Odyssey 30Z has a Ford E-450 chassis you'll need the Roadmaster Exact Center Steering Stabilizer w/ Custom Brackets # RM47MR. If you also wanted to upgrade your suspension with anti-sway bars you would need part # RM-1139-147 for the rear and part # RM-1139-189 for the front.
    view full answer...
  • Reducing Front End Sway on 2020 Jayco Greyhawk E450 Motor Home When Pulling A 2015 GMC Sierra 1500
    To reduce the front end movement on you 2020 Jayco Greyhawk E450 motor home pulling a 2015 GMC Sierra 1500 I recommend the following: Roadmaster Front Anti-Sway Bar Item # RM-1139-189 Roadmaster Rear Anti-Sway Bar Item # RM-1139-147 SumoSprings Solo Custom Helper Springs - Front Axle Item # SSF-106-40 Roadmaster Exact Center Steering Stabilizer w/ Custom Brackets # RM47MR The springs help your suspension support the weight from the truck by keeping the RV up level. The sway bars reduce...
    view full answer...
  • Recommended Front And Rear Anti-Sway Bars For A 2023 Entegra Odyssey 24B Class C Motorhome
    For a 2023 Entegra Odyssey 24B on a Ford E-450 chassis you would need the Roadmaster Front Anti-Sway Bar - 1-3/8" Diameter # RM-1139-189 and rear # RM-1139-147. If you also wanted to add in a steering stabilizer then you'd need the Roadmaster Exact Center Steering Stabilizer w/ Custom Brackets # RM47MR.
    view full answer...
  • Recommended Steering Stabilizer For A 2018 Jayco Greyhawk 26Y
    For a 2018 Jayco Greyhawk 26Y on a Ford E-450 chassis you would need the Roadmaster Exact Center Steering Stabilizer w/ Custom Brackets # RM47MR. This stabilizer is a simple bolt-on design with no drilling required. If you don't already have a rear sway bar then I recommend installing the Roadmaster # RM-1139-147 as well. If your front anti-sway bar is less than 1-3/8" thick then you can beef it up with the # RM-1139-189 as well.
    view full answer...

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
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Jeff D
Employee Jacob T
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Jacob T
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Chris R
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John S
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Employee Aidan B
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