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.
Sharp turns and uneven roads can make a heavy vehicle feel unsettled. The 1-5/8" diameter Roadmaster rear anti-sway bar ties the rear axle to the chassis to balance weight transfer through corners and quick maneuvers. By reducing side-to-side movement, it keeps the ride level and stable, even when the road gets twisty or the load shifts.
Crosswinds, passing semis, and rough pavement don’t need to wear you out. This system minimizes sway so you’re not constantly correcting the wheel. With the rear bar absorbing side-to-side forces, steering stays steady and the vehicle tracks straight. That means fewer corrections and a more relaxed drive from start to finish.
The bar is made from thick 4140 chromoly steel—stronger and harder than standard 1020 steel—and its large diameter increases roll stiffness. That strength translates into consistent performance and a setup that resists flex when things get rough. It’s a solid foundation for better handling and long-term durability.
Instead of standard rubber, the system uses polyurethane bushings that hold up against oil, gasoline, and ozone. They don’t squish out or deteriorate easily, so there’s less give in the system and more consistent support over time. The result is smoother motion where it’s needed and reliable stability everywhere else.
You don’t have to modify the chassis to get better control. The bar mounts to the rear axle and frame using the included heavy-gauge mounting hardware and bushing lubricant. With no drilling required, installation is a clean, bolt-on process that gets you back on the road sooner.
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!
Kate F.
5/6/2026
Love this review Charles! It really is amazing the difference an upgraded sway bar, or adding a sway bar can do. Personally I think that every truck should come with a rear sway bar, it is sad that most do not now a days. Where did you go for your first trip?
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
Do you have a question about this Anti-Sway Bar?
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!