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When your vehicle leans hard through corners, it’s not just uncomfortable — it’s wasted motion. The Roadmaster Rear Anti-Sway Bar ties the rear axle to the chassis with a thick 1-3/8" diameter 4140 chromoly steel bar that balances weight transfer and fights body roll. The result is a more planted feel through sharp turns, quick lane changes, and uneven surfaces.
Crosswinds and passing semis no longer throw you off line. This rear bar uses the axle’s weight to brace the frame, cutting side-to-side sway that makes long drives tiring. It keeps the ride level and predictable, so you can drive relaxed instead of constantly correcting the wheel.
Built to outlast stock components, the bar’s 4140 chromoly steel is considerably harder and stronger than standard 1020 steel. Polyurethane bushings resist wear and damage from oil, gasoline, and ozone, so there’s less give in the system and more consistent support mile after mile.
No need for frame modifications. The bar attaches directly to the rear axle and chassis using heavy-gauge mounting hardware. It comes with bushing lubricant and clear instructions to make the install straightforward with standard tools.
With its durable materials, precise design, and Limited Lifetime Warranty, the Roadmaster Rear Anti-Sway Bar delivers stability you can trust for the long haul.
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
Ratings & Reviews
Maurice A.
6/22/2021
always meets expectations. Very satisfied
Steve J.
9/28/2023
Still working great and helped quite a bit keeping tight steering without the pulling to the right or left.
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!
Jameson C.
10/7/2026
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.
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James D.
6/13/2026
Thank you for sharing your experience. We're sorry to hear the installation required additional expense, especially when the kit is confirmed to fit your vehicle. Glad to know the product is making a difference but I would like to know what was the extra expense for?