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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.
Features:
Specs:
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.
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.
Average Customer Rating: 4.8 out of 5 stars (502 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.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
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
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
Easy install and the best solution for my 2017 A.C.E. 29.3 motor home . Big difference in handling . 824105
Should have bought it earlier. Makes a huge difference in driving. It took the rock and roll out for sure. I had to leave off the inside washers on allen bolts to line up the shocks. Installed easily in 1.5hr. Pretreat bolts that need removing with penatraitor. 815203
This went on our 2019 Windsport 29M. Outside of a couple minor install issues (Breaking frame bolts loose and needing to remove washer on the buttonhead bolt so the shock would fit in) the purchase went great - CS was very helpful the part shipped and arrived quickly. I just finished the test drive and there is a noticeable difference in stiffness I should mention we already had front and rear Sumo springs and Roadmaster steering stabilizer which are a huge improvement over the stock chassis but still wanted to improve the interstate semi push and unexpected wind gusts . So far so good. 810003
The addition of this sway bar made a significant difference on my Ford f53 chassis. 811761
A little more difficult to install than the video shows but am tickled to know it’s done. 807486
This has made such a difference, that my wife will now drive the rig . We taken a country loop with this set up. This time we left the white knuckles at home. Note we have also put on the rear anti-sway bar and steering stabilizer. 806789
From first contact with etrailer to end use the experience was great. Since I have mechanical experience and tools needed the install was straight forward. The sway bar made a huge difference in handling for our 29 ft class A. 790213
Purchased this sway bar for my class A motorhome along with the front sway bar and steering stabilizer. Got a local RV shop to install. Made a big difference on handling when trucks pass and cross winds hit. Yes you still feel them to a degree, however the white knuckling and fear is gone. 786414
I am a long time customer of etrailer because of everlasting factors. First, they have great products. Second, they have knowledgeable customer service personnel who answer the phones when you call and who give good advice. Third, returns on a few products I have purchased in the past have been simple. Fourth, I have always received the products I have purchased quickly. Fifth, their videos about their products and their installation videos are very thorough. Now to the review of part RM-1139-140. I am also going to review another part, RM-1139-146, both Anti-Sway bars made by Roadmaster, that I ordered yesterday at 3:07 pm. I received both items today—the very next day at about 3pm. WOW! The sway bars are very robust—1 1/2” diameter and a much superior steel compared to the smaller diameter OEM sway bars. I am expecting a substantial improvement in the handling characteristics of my new motorhome. 777971
Roadmaster Rear Swaybar #1139-146 Purchased: December 2019 Installed: March 2020 Installed on a 2017 Winnebago Vista 29VE Once installed, along with the Roadmaster front sway bar #1139-140, I now have a Ferrari to drive. I already had a Safe-T-Steer installed but it is absolutely amazing how easy this unit now drives. Highly recommend especially to first timers an for us oldies. Just a few installation comments. The front bar was a piece of cake to install and done by myself in about 45 minutes. No more to be said. The rear however (on my unit) wasn't as easy as the videos. Main issue was the 4 frame bolts that had to be removed. Neither my battery impact wrench, a friends Ingersoll Rand impact wrench or a 3/4" breaker bar with 6' of pipe would break them loose. Another friend had a brand new Matco Tools #27790 impact wrench that was spec'd at 1600ft/lbs that still after some hammering did they finally break free. Found similar issue on several post on some RV forums. The only other issue was I have to leave off the 'cut' washer that was supposed to be behind the button head screw (at the bottom of the shock mount) to be able to reconnect the shocks. Other than that everything else was a piece of cake. Probably 2 hours to install and clean up once those 4 bolts were finally loosened. Again would definitely recommend. Just get a good impact wrench. 775878
Great experience to this point! I was hesitant to order the parts online but was very surprised and happy that I did. A very nice young lady answered my call and she was cheerful and knowledgeable about the products. In short, she was great! My product arrived on time and I was able to easily track its location as it moved across the country since they had provided me an easy online method. I’m excited to install the Steering Stabilizer and front and rear Anti sway bars. Thank you etrailer and Odelia for your wonderful service! 775178
Easy to install but no way shocks will fit back in bracket with the cut off half washer used on the hex bolt. Otherwise install was easy. 762947
I just love it when a product works as good or better than it is advertised and this swaybar is just that . An easy installation and corrected my problem ! 762000
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
I ordered the SumoSprings and Roadmaster Anti-sway bars front and rear. Install was straight forward and results were better that expected. 730749
Great product. Helped take the sway out of my motorhome. 728771
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
Quick delivery and pretty straightforward installation except I had to enlarge some holes in order for the bolts to fit. 719920
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
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
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
Huge difference in the handling on the test drive. Can't wait to try it out on the freeway 665386
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