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Heavy loads and high centers of gravity can make a rig feel like it’s leaning too far through turns. The 1-5/8" diameter Roadmaster rear anti-sway bar ties the axle to the chassis to balance weight transfer and cut down body roll. The result is a steady, level ride that keeps things planted when cornering, hauling, or dealing with sudden maneuvers on the highway.
Crosswinds, passing trucks, and shifting cargo can wear you out behind the wheel. This system minimizes side-to-side movement so you’re not fighting the steering wheel mile after mile. With the bar bracing the frame against the axle, your vehicle tracks straighter, the steering feels firmer, and long hours on the road are a lot less tiring.
This isn’t mild steel. The bar is built from 4140 chromoly, a chromium-molybdenum alloy that’s significantly harder and stronger than the 1020 steel found in many stock setups. The thicker bar diameter boosts torsional stiffness by nearly 30 percent compared to typical anti-sway systems, giving you a noticeable bump in resistance to sway and roll.
Roadmaster swaps out soft rubber for polyurethane bushings that resist damage from oil, gasoline, and ozone. They hold their shape, so the bar keeps its tight, consistent feel over time. Heavy-gauge hardware, included lubricant, and fixed end links round out a setup that’s solid, low-maintenance, and ready for the long haul.
Installation is straightforward thanks to the included mounting hardware and no-drill design. The bar attaches directly to the rear axle and frame and is engineered to avoid interference with most popular suspension add-ons. That means you can boost stability without reworking the rest of your setup.
Customer Satisfaction Score:
96% were satisfied with this product
4% 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
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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!