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

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

Part Number: RM-1139-155
In Stock
$433.94
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.

Add to cart
zoom in icon
slider vertical 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

Need help with installation?
Locate installers near me
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-1139-155 or order online at etrailer.com. Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Roadmaster Front Anti-Sway Bar - 1-1/2" Diameter. Anti-Sway Bars reviews from real customers.
  • All Info
  • Reviews (1980)
  • Q & A (0)
  • Photos

Roadmaster Anti-Sway Bars - RM-1139-155

  • Anti-Sway Bar
  • Roadmaster
  • Front
  • 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 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
  • Works with rear anti-sway bar (sold separately) for absolute stability - available on certain applications only
  • Made in the USA


Specs:

  • Bar diameter: 1-1/2"
  • Limited Lifetime Warranty


Roadmaster Anti-Sway Bar Installed

Benefits of an Anti-Sway System

The Roadmaster anti-sway bar does for side-to-side movement what a good pair of shocks does for up-and-down motion. You will notice a marked improvement in your vehicle's stability as the bar works to balance weight transfer and reduce body roll. The anti-sway bar acts as a link between your vehicle's frame and its 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.



1139-155 Road Master Anti-Sway Bar - Front

Installation Details RM-1139-155 Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Roadmaster Front Anti-Sway Bar - 1-1/2" Diameter - RM-1139-155

Average Customer Rating:  4.8 out of 5 stars   (1980 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:

The bolts for your brackets are much larger than the stock bolts. Would not be possible to drill out the holes. It does not work.



by:
2003 Ford F-250 Super Duty

I first bought a Hellwig front sway bar because it was $150 cheaper, and cheap it was. Gouges, flat spots and edges on the bar where the bushing makes contact, cheap hardware, little consideration for the abuse the packaging would endure shipping such a heavy, awkward thing. Their product wasn't even worth the return shipping, so they asked me to cut it up to make it unusable and send a pic before they would grant a refund. Anyway, now that I have the Roadmaster sway in my hands, I can say it is well worth the extra price, and I am never looking back.



by:
1999 Ford F-250 Super Duty

Never mentioned you had to be a metal fabricator to mount to vehicle. This will never ever fit on factory mounts. $400 gone with the wind. The video by company is terrible and doesn’t show any of the install on purpose.

Etrailer Expert

Katrina D.

8/1/2023

You definitely do not need to be a metal fabricator in order to install this anti-sway bar. However, with 1999 vehicles, it is noted that you must have the factory sway bar. Which includes additional 1/2 inch hardware for 1999 model year installation.



by:

These things ar BEEFY! Easy to install and seem to help with sea sickness!



by:

I already have one on the rear of my truck and thought that it had stop the roll. Now with the front on it's like driving a sports car. Very easy to install. I recommend this for anyone with a cab over camper. Great product!!!



by:
2003 Ford F-250 and F-350 Super Duty

All products were great.



by:



by:

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:

All the contents were delivered in the package. The kit fit perfectly as designed. Ordered for a Ford F-350 Super Duty. Truck handles great!



by:

Very straight forward remove and replace operation/installation. One person can do this laying on their back in a driveway. I'm very pleased with the drivability since the installation. The number one reason is - reduced driver fatigue!! And that's with 2 exclamation points!! Prior to this, I replaced the original shocks with a set from Koni, and upgraded Sumo Springs. To include, a steering stabilizer from Safe-T-Plus. One would think it would steer itself; at this point. All-in-all, I'm happy with this suspension upgrade.



by:

Received the product in a timely manner. The shipping company used I’d give a no star rating. I received the anti-sway bar bare out of a box or wrapper with the installation part box and a cut out piece of cardboard with the shipping label on it taped to the bare bar with about five yards of packing tape. The bar was scuffed, scratched and chipped with the RoadMaster label destroyed. I realize it’s going to be installed under the front of my motorhome but as much as it costed I would like to be the one to scratch and scuff it. If I was a company installing this on a customers vehicle I’d return it. I do not believe it was shipped from etrailer in this condition.



by:

We upgraded our front sway bar on our 2005 Jayco Granite Ridge on the Ford E450 chassis a year ago prior to starting a 17,000 mile trip around the country. It was a game changer for, improving handling and stability significantly (along with proper tire inflation). The installation video is very misleading regarding the ease of installation, showing only the attachment on the right side. The left side is much more difficult requiring wedging the stabilizer tab between the suspension and stabilizer plate. Just be ready for that, it is more involved than the right side.



by:

With about 600 miles pulling the RV, we are mildly impressed with how well our three-quarter ton tracks down the highway while pulling the RV. Well worth the upgrade.
However, etrailer needs a video on adding the hangers. There are no instructions that come with the kit that cover the hangers. The hangers have different size bolts, the shorter ones fit inside the frame.



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:

Replaced the sway bar on my 1996 Fleetwood Flair. Easy bolt on installation. Have issues with the front-end swaying and bouncing around in cross wind and when approaching a slower moving truck. The new sway bar helped some but not as well as it was claimed.



by:

Dit this job my self , no lift , on the floor on my back and got it installed. Front and rear anti sway bars and 4 new bilstein shocks and yes u need the 8 swivel head socket/wrench tool from harbor freight to do driver side. The rest of the instalation whent well, the onley consern is the front bracket sadle and bushing sits nearly on the bend of the sway bar ( see photo )



by:

Great buying experience with ETrailer. Fast shipping and quality constructed part. Noticeable difference in controlling body sway. Very pleased with the bar and highly recommend Etrailer.



by:

This is night and day! We have a 2019 Newmar Bay Star Sport 2813, and we already had the supplemental rear bar, Safe-t-Steer and Koni Shocks. Nothing made the difference that this did! With the new sway bar our coach doesn't sway going down the road, and is at least 75% better on corners. Going out a driveway doesn't have the crazy see-sawing it had before!

My wife now likes riding in our motorhome, versus screaming about every corner before.

I'm sure all of you running the Ford F-53 chassis will have the same level of improvement!



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:

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:

This rear sway bar is very heavily built. Not easy to install by yourself, but doable. Honestly, I don’t feel allot of difference, however, I have already added inline air valves that reduce sway and the chassis has “V-Ride”, so I don’t know how much of a difference I would have felt without those items. As far as tractor trailer passing me, there’s a marginal improvement. Still, that being said, I’m happy with the purchase.



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:

I am happy to finally have the rear anti-sway bar installed. Noticed the difference right away. I will order the front anti-sway bar soon. I have the skills to install the anti-sway bar, but did not have the heavy tools to do the job. Paided a local shop 2hrs labour, well worth it.


25
1804
Show More Reviews

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

  • Diameter of Roadmaster Rear Anti-Sway Bar 1139-153
    I checked with Roadmaster for you, and I verified that the thickness is 1-3/8 inches for the anti-sway bar: - Roadmaster Rear Anti-Sway Bar # RM-1139-153 This is good because the thicker the anti-sway bar, the more roll stiffness there is, which means you get more control over sway and body roll. A rear anti-sway bar is really the best thing you can add to counteract sway and improve stability and handling of your truck. The # RM-1139-153 is a replacement for the rear factory anti-sway...
    view full answer...
  • Front and Rear Anti-Sway Bars For a 2012 Thor ACE Motorhome
    The Roadmaster Front Anti-Sway Bar # RM-1139-155 you mention will actually not work with your 2012 Thor ACE Motorhome. I did some digging around and it looks like your motorhome was built on a Ford F-53 chassis and has a 16K GVWR. With that in mind, I was able to find the Roadmaster Front Anti-Sway Bar # RM-1139-148 as well as the Roadmaster Rear Anti-Sway Bar # RM-1139-146 should you be interested in the rear as well.
    view full answer...
  • Roadmaster Front Anti-Sway Bar for a 2003 Ford F-350 4x4
    The Roadmaster front anti-sway bar # RM-1139-155 is listed as a fit for a 2003 Ford F-350 4x4. There is also the following note from Roadmaster: Front sway bar kit for 2000-04 Ford F250-F350 trucks with straight axle (all 4WD models and F450 with front leaf springs, and F550 2WD models). Replaces factory sway bar. Must have factory sway bar. I have included a link to the installation instructions for you.
    view full answer...
  • Front Anti-Sway Bar For 2000 Ford F-350 Super Duty 4WD
    I checked with Roadmaster and the 4139-125 is not a fit for the factory anti-sway bar of the 2000 Ford F-350 4WD; per Roadmaster that part is a fit for some models of F-53 and F-550 Class A motorhomes. While there isn't a bushing kit designed for the factory anti-sway bar of your 2000 F-350, there is a replacement front anti-sway bar: - Roadmaster Front Anti-Sway Bar # RM-1139-155
    view full answer...
  • Will the Roadmaster Front Anti-Sway Bar # RM-1139-155 Fit 1999 Ford F350 Dually with Factory Bar
    I spoke with my contact at Roadmaster and yes, the Front Anti-Sway Bar, # RM-1139-155, will fit your 1999 F350 Dually with factory bar. The 1999 model was excluded if a factory bar isn't present.
    view full answer...
  • Feedback on Roadmaster Reflex Steering Stabilizer # RM-RBK16-RSSB
    The part you referenced, the Roadmaster Reflex steering stabilizer # RM-RBK16-RSSB, is a confirmed fit for your Ford F-350 4-wheel drive pickup. Roadmaster makes stabilizers for trucks and SUVs as well as for the heavy duty market, such as large motor homes and emergency vehicles, so they do make a good product. The customer feedback we have received stated that the part was easy to install and it really fixed the swaying on the customer's vehicle. Did you have a chance to drive the truck...
    view full answer...
  • Front And Rear Suspension Enhancement For A 2003 Ford F-250.
    We have what you need. I recommend the Roadmaster Front Anti-Sway Bar # RM-1139-155 for your front end. This will minimize sway and driver fatigue. Who wants to be tired just from hauling an RV or trailer around? Also this will help during windy situations and during evasive maneuvers. Now for the rear end of your 2003 F250. If you want a more hands off approach or a set it and forget it I recommend the RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty # RAS3611-HD....
    view full answer...

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


Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Jeff D
Installed by:
Jeff D
Employee Wilson B
Updated by:
Wilson B
Employee Isabelle B
Updated by:
Isabelle B
Employee Sabrina W
Updated by:
Sabrina W
Employee John S
Video Edited:
John S

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.