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Few things shake confidence like feeling a rig lean too far in a curve. The Roadmaster Rear Anti-Sway Bar ties the rear axle to the chassis with a thick 1-1/2" diameter 4140 chromoly steel bar that balances weight transfer through corners. That means less body roll and a more planted, controlled ride when you turn or make sudden maneuvers. The bar uses the weight of the axle to brace the frame, so your setup stays level and predictable even on uneven pavement.

Crosswinds and passing trucks won’t push you around the same way once this bar is in place. By minimizing side-to-side movement, it keeps the rear of the vehicle from “wagging” behind you. The result is a calmer, straighter track and far fewer steering corrections. Long stretches of highway driving take less effort, and you stay more relaxed behind the wheel.
This setup is built stronger than factory components. The 4140 chromoly steel bar is much harder and tougher than typical 1020 steel, giving it nearly 30 percent better resistance to sway. Polyurethane bushings replace standard rubber, holding up to oil, gasoline, and ozone without squishing out or breaking down. Less flex at the connection points means more consistent support and durability over time.

You don’t have to cut or drill anything to get it installed. The bar bolts directly to the chassis and rear axle using the included heavy-gauge hardware, bushing lubricant, and straightforward instructions. It’s designed to work around most aftermarket suspension gear, so you can add it to your current setup without interference.
Bar diameter: 1-1/2"
Material: 4140 chromoly steel
Bushings: Polyurethane
Mounting: Hardware included, no drilling required
Warranty: Limited Lifetime
Ratings & Reviews

Fred
8/15/2026
Excellent it works great


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.
3/7/2025
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!
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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!