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

Roadmaster Rear Anti-Sway Bar

Item # RM-1139-123
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Retail:$372.80
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Anti-Sway Bars

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Roadmaster Rear Anti-Sway Bar Rear RM-1139-123
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Minimize sway and driver fatigue by improving the stability and driveability of your vehicle. The bar on this sturdy, effective anti-sway system mounts to the rear axle and to the frame to balance weight transfer and reduce body roll. Call 800-298-8924 to order Roadmaster anti-sway bars part number RM-1139-123 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.
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Roadmaster Anti-Sway Bars - RM-1139-123

  • Roadmaster
  • Anti-Sway Bar
  • 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.



1139-123 Road Master Anti-Sway Bar - Rear

Installation Details RM-1139-123 Installation instructions

This Product Fits The Following Vehicles





Customer Reviews

Roadmaster Rear Anti-Sway Bar - RM-1139-123

Average Customer Rating:  4.8 out of 5 stars   (554 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-1139-149
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


GOOD PRODUCT 498565



- RM-1139-140
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


Good anti-sway bar. Installation was made difficult by being unable to easily remove the OEM anti-sway bar. Although this item was intended to go on a near-new 2015 motorhome, the original retaining bolts were very difficult to remove. However, installation of the RM 1139-140 was relatively easy and completed in about an hour by one person. If two people did the task, it could be done in half that time. The only disappointment, and it was significant, is that there was no mention of torque values for the mounting bolts. 223089


Comments
After a year of use over about 8,000 miles, I have to say the improvement they made are moderate at best even considering I put them on the front and back.
Vince L - 08/30/2016

20677

- RM-1139-140
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


Great customer service from purchase to delivery. Kept informed all the way by George with fast shipping. Sway bar was quick and easy to install on my 2018 Windsport, about 1 1/2 hours by myself. Considerably heavier than original, helps reduce sway as advertised. Great experience with company would purchase other items in future. 483047


Comments
Sway bars are still working great. Would not have another RV without them.
Thomas - 03/09/2019

50330

- RM-1139-140
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


Combined with rear sway bar drives just as I had hoped 312489



- RM-1139-176
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


I would like thank Crystal at etrailer for expediting my order. She verified i had the right part number, verfied it was in stock, and personally expedited the shipping. 2 days later the part was in hand at the rv park we were staying at and 1 hr later i had the part installed. Thank you again Crystal for all your help and i will be order from you folks again. 334111



- RM-1209-131
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


Installed on MB Sprinter 3500 RV. Corrected sway and yaw when being passed by big rigs. Install directions were confusing. Called Roadmaster, they sent better instructions and talked with installer and solved the issue. 643712



- RM-1209-131
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


I put this on my 2015 Winnebago view. I left the stock swaybar and added this one to the front of the rear axle. It was the single biggest improvement that I did to the suspension. I can't believe Winnebago sells the RV without this upgrade. It improves handling in the wind or turning corners tremendously. 258934



- RM-1139-140
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


I received my order, but all the parts wasn't with it. All I got was the bar and the two bushing and brackets that mounts the bushing to the frame. All this came in one long box. According to the picture there are suppose to be more parts. I thought this is an expensive part for no more than I got with it. $ 600.00 for a bar really!! 211264



- RM-1209-131
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


I just installed the roadmasteranti sway bar 1209-131 on my 2013 Winnebago via.The vehicle is a 2012. it fit well and road test good. I had to shorten the exhaust about 9 inches because it interfered with drivers side arm other than that its good to go. 108043


Comments
I am thinking about adding the 1209-131 to my 2011 Winnebago Via 25Q. Which model Via do you have? Im hoping I wont have to modify the exhaust on my Via Q. Thanks.
-- comment by: Jim - 02/17/2014

2844
Comments
I put the sway bar on a 2012 25t I did shorten the exhaust about 9 inches I think 2 or 3 inches would have been good. That was easy to do, as new as they are just take exhaust loose at first coupling pass the elbow slide it out and take some off the piece that goes to the inside. Worked well for me. Going from our drive onto the blacktop road in front of our place was all it tuck to decide it was worth the effort. It fit very well. Thanks Mack. PS I am 75 and 240 Made a man door step for drivers door .It works well Love it. Mack
-- comment by: Mack - 02/19/2014

2869

Thanks for following up with us!

-- Patrick B - 2/19/2014

Comments
Mack, Patrick,Thank you!
-- comment by: Jim - 02/20/2014

2878
Comments
Still working very good I am not sure I needed to shorten exhaust but I did not know how much movement would be in the down rod So I did it just in case, working very good Mack
Mack - 11/21/2014

7779

- RM-1139-149
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


Received product in a timely manner, package a little damaged but all parts were there, installed myself. Video was helpful except where it says refer to instructions for torque limits. Written Instructions and chart below do not agree. 568016



- RM-1129-111
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


I have a 2000 dodge van 3500. Roadtrek versatile. The installation of Sway bar 1129-111 was somewhat easy. Except for connection to the Fram rails. Vinyl cover on driver side fram rail and propane lines next to rail on both sides. It would make installation Easter to remove rear tires and support vehicle on Jack stands on level ground. After driving for several miles the sway bar performed well. Would recommend rear sway bar to help stabilize your vehicle. Thank you 386045



- RM-1139-146
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


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-1139-176
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


Let start with Mark S. Sale Rep Good Job Very Helpful Courteous and very informed. Very prompt on returning my calls. Thanks Mark S. you define what is the Excellent in Customer Service Wow same Day Shipping every time that evening your order will be at UPS heading your way. Got the Sway bar installed Instruction clear and precise. Made a huge differences in way motor home handle . I have not installed the back sway bar motor home. This upgrade very well worth the money. Dont think no more about this upgrade; just order and install . you wont regret it. 508616



- RM-1139-146
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


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-1139-165
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


I have a F350 dually with a 2300 pound slide in camper that rocked to the point it was scary to go around a turn. I just installed the rear sway bar and the difference is unbelievable. I have just ordered one for the front. Well worth the money. 135527



- RM-1139-149
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


Drives and handles 200% better. Manufacturers should be required to install these at the factory. 672850



- RM-1139-149
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


Tammy P. made sure I received the sway bar when I needed it. Great service. 683359



- RM-1139-145
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


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. 398602



- RM-1139-140
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


I purchased this kit and the Roadmaster rear anti-sway bar kit for installation on my 2015 Fleetwood Flair, 26-foot. Before purchasing, I called Roadmaster to make sure this kit could be installed on my small RV, as they make smaller kits for smaller RVs. They indicated it could be installed, and I'm glad I went with the heavier kit. The install took maybe an hour, with the only glitch being some difficulty getting the poly bushings and brackets over the new bar. I called Roadmaster, and the tech noted that the brackets DID look to small, but with some jiggling and finesse, the bolts should fit, and they did. My only irritation with this, and the rear anti-sway bar kit, is that the Roadmaster instructions do not provide ANY torque specifications for bolts to be replaced, either Ford F53, or kit specific, so be prepared to make some calls or go on an Internet search to find the right torque specs. 224319



- RM-1139-147
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


Very nice quality product and installation was pretty straight forward with the right tools, just take your time and do things step by step. This sway bar was installed on a 2004 Fleetwood Jamboree on E450 Chasis. Rides great now with less sway and more control! 466581



- RM-1139-140
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


This product did what it advertised it would do. For my motorhome it made the front end suspestabilizer that came with it.nsion work a lot better than the 428410



- RM-1209-131
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


It took a little effort on the phone to figure out which sway bar was needed for the motorhome I have. I was skeptical about the right one being sent but it was correct and installation was a couple of hours. It fit perfectly and really dampened the body roll we were having. Worked great, service and delivery was fantastic. This was the first time I have used etrailer.com and am very happy with their product and willingness to help. I'll be using them again and I highly recommend them. 356110



- RM-1139-149
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


This is the first of three pieces I wanted to install on my Rig. (budget permitting) The advice to start with this rear sway bar first was spot on. Since this augments the existing sway bar and doesn't replace it, It really does makes a difference. I chose to have it installed by my local RV Shop, since they had all the equipment and tools to do it right. I paid them $225.00 for the install. The tech reviewed the installation video and was pleased I had all the torque data. I might tackle the front anti-sway bar and the Reflex Steering Stabilizer by myself, but this was more than I cared to tackle on my own. Those existing U-bolts are a beast to deal with for this do it yourselfer and I was glad to let him handle it. 669629



- RM-1139-173
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


Installed this on my 2015 Ford F350 to help with truck camper sway. Super easy install for a Ford F350 if you already have the pencil thin stock sway bar. The Roadmaster model 1139-173 is the one you need since you can reuse your end links. The bar was packaged well. I was looking at the Hellwig Big wig first since it is cheaper and comes with new links. But it is extremely difficult to remove the existing link above the fuel tank. Also the Hellwig is a thinner bar. It came packaged very well and arrived only a few days after I purchased it on Etrailer. Overall very happy with the results. The truck corners well under load and sway is all but gone when fully loaded with the camper. 579086



- RM-1139-149
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


The rear sway bars on my Tiffin motor home were so small that trucks almost knock us over. Has the new sway bars fixed the problem? No, but 80% of the sway we were getting is gone. Still needs track bar, and Sumo air bag helpers. Probably the best purchase so far for what we are trying to accomplish. Recommend them highly. 570979


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Updated by:
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