To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
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.
You feel it every time the wind kicks up or the road twists, your RV sways and you're stuck overcorrecting. This rear anti-sway bar keeps your vehicle planted, so you stay in control no matter what's coming at you.
Stays Centered in Crosswinds: Keeps your RV steady in wind or when trucks blast past you.
Keeps Things from Shifting: Cuts the sway that moves things inside your RV around while you drive.
Reduces Wear on Suspension Parts: Helps take stress off bushings, mounts, and shocks over time.
Helps When You're Towing: Adds rear-end support to keep the coach stable when you're hauling a trailer.
Installs Around Common Add-Ons: No need to pull your air bags, brake controller, or rear support gear.
No Maintenance: Once it's bolted on, thats it - no adjustments need to be made.
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.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everybody, Andy here with etrailer.com. Let's take a real quick look at this Roadmaster Rear Anti-Sway Bar. Now, this anti-sway bar has been designed to fit your 2018 and newer Freightliner S2RV Class C, and on custom-fit parts such as this item, I do recommend taking advantage of our Vehicle Fit Guide here at etrailer.com. Just input the year, make, and model of your vehicle and our Fit Guide will confirm if this will work for you or if we have something comparable that will work for you. So, this bar mounts to your rear axle and to the frame of your vehicle to help minimize side-to-side movement, helping to improve the overall stability of your vehicle. This system is going to let you execute turns and quick maneuvers with confidence, giving you a level ride, even on irregular surfaces, and this is also going to help reduce driver fatigue by minimizing the effort required to keep your vehicle in line.
It's also going to help diminish the effects of crosswinds, passing motorists and shifting cargo. This anti-sway bar does for side-to-side movement what a good pair of shocks does for that up-and-down motion, giving you a marked improvement in the overall stability of your vehicle. So, this 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. So, this has been engineered also to avoid interference with most popular aftermarket add-ons such as airbags and things like that and accessories, so you shouldn't have to pull those down to get this installed. Now, this bar has a diameter of two inches, and it is made here in the USA of 4140 chrome-moly steel, giving you that superior strength, and 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 this bar is going to increase its torsional roll stiffness. Now, giving you just a brief closeup here, I wanted to briefly mention these bushings. They're made of polyurethane instead of the standard rubber variety for a longer-lasting system. They're durable and they're resistant to damage caused by oil, gasoline, and ozone, so less wear means less give in the system, and better overall support. You are going to receive instructions to guide you through the installation process.
All of the hardware that you see here along with Vibra-Tite and bushing lubricant. So, the bar and the brackets and the plates and the links here, they've all been, as you can see, they have a glossy black powder-coat finish to help resist rust and corrosion, and the hardware will also do a great job of resisting that rust and corrosion as well. This does have a limited lifetime warranty from Roadmaster, and if you do pick this up, we would love to hear back from you regarding your experience with getting this installed and using this. If you think that the installation might be something that you don't want to deal with on your own, take a look on this product page. Right underneath the photo section, we have an Installer Locator link there.
You can click that and input your ZIP code, and our Installer Locator will find an installer that etrailer has partnered with locally in your area to get this installed for you. But if you have any other additional questions that I didn't cover for you today, don't hesitate to reach back out to us. We do wanna make sure that you're getting exactly what you want and need. Well, I think that's gonna wrap up our quick look today. I do hope that it was helpful for you. Again, my name is Andy, thank you for joining me.
Customer Satisfaction Score:
85% were satisfied with this product
15% of customers were not satisfied
Ratings & Reviews
Fred
8/15/2026
Excellent it works great
Jerred H.
8/16/2026
Gwendolyn Y.
4/8/2025
No more white knuckling! That's awesome to hear, Kris. I'm glad that this bar helped so much so you can have a more relaxed drive :)
Kris
3/17/2026
I have taken a few trips with the Clatter Cabin now. It’s been enjoyable to drive. Since then I have replaced the exhaust from the engine back with 2 12 inch pipe. I was able to get the pre bent exhaust parts over the axle and clear your rear sway bar nicely. Now she purrrrs!
Kate F.
9/24/2025
Install looks great Steven! I can't wait for you to take it out for a spin so you can see the difference for yourself, it is amazing what a upgraded sway bar does to your ride, no more white knuckles for you, or your wife. What big stops do you have planned on your trip to the West Coast?
Ken
8/19/2025
No complaints with the handling. This is a good sway bar!
Jenny N.
6/25/2024
What I recommend is touching it up with a rust resistant paint like Rustoleum. We will be in contact with you about the damage. Please keep an eye on your email.
Leonard
6/22/2025
After a year and many miles I would give it a five star for sure. Made a great improvement over the stock anti-sway bar. With the rear and front RoadMaster anti-sway along with the RoadMaster steering stabilizer the E-450 33 foot class C motorhome drives like a dream. I highly recommend these three products. If not all at once then this order, 1st rear anti sway bar then 2nd front and then the steering stabilizer with the spring on it.
Dan K.
4/22/2026
wondaful! highly recommended.
Gwendolyn Y.
4/28/2025
High-five on the install, Curtis! Also, thanks for sharing all the pictures and showing all the angles of the sway bar. They are really helpful for anyone looking to tackle this install themselves at home!
Brooke M.
6/17/2025
So glad to hear that, Dimitrios! Thanks for including a photo, too.
Michael
3/25/2026
After a year the system is working great. It has made the driving much safer and smoother.
Gwendolyn Y.
3/25/2026
Gwendolyn Y.
3/7/2025
Sounds like a much smoother drive, Riley! I looked up your camper to see how tall it is and I can see exactly why its called a Bigfoot. What's been your favorite place you've traveled to so far with the camper?
Riley
3/6/2026
The two Roadmastercsway bars weve been using continue to impress and perform like they did on day one. Driving back across the country with some days having stiff criswinds continually we rode comfortably and never had handling or steering issues. I remain adamant that these are undoubtedly the best products on the market for this application and welcome any questions. For reference my truck is a 2018 F350 crew cab DRW, 6.7 diesel 4x4 long bed with Bigfoot 3000 series truck camper. Get the Roadmasters!
Brooke M.
6/18/2025
Super happy to hear that, Kevin! Thanks for including the photos, too. Would you have any tips or tricks for any future readers about how to get around the obstacle you mentioned?
Brooke M.
6/22/2025
Info for this part was:
At etrailer 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.
Matthew
10/7/2026
This is a complete game changer when using a truck camper Mine is an Arctic Fox 990. I would list this under a must have accessory when using a truck camper. Unloaded ride when you hit off camber bumps is slightly rougher, but hey its a Ram 3500 dually for hauling heavy stuff. Also the performance when carving twisty canyons with an empty truck is astonishing....Watch out Corvetts, here I come!