To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
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If you’ve ever felt your rig lean too much in a turn or sway through uneven roads, this setup fixes that. The 1-3/4" diameter rear anti-sway bar ties the axle to the chassis to balance weight transfer and cut down side-to-side movement. The result is solid, predictable handling that keeps the ride level even when conditions change fast.
This bar isn’t made from ordinary metal. It’s built from thick 4140 chromoly steel—tougher and harder than the typical 1020 steel used in most applications. The larger diameter boosts roll stiffness and helps it resist sway nearly 30 percent better than standard bars, giving you the kind of stability you can feel through every corner.
Instead of rubber, this system uses polyurethane bushings that stand up to oil, gasoline, and ozone without breaking down. They don’t squish out or wear like softer materials, so the support stays consistent over time. Less give in the system means tighter control and smooth performance long after install day.
There’s no drilling or guesswork needed here. The bar attaches directly to the rear axle and frame using the heavy-gauge mounting hardware and bushing lubricant included in the kit. It’s designed to work around common aftermarket parts too, so you can bolt it up and get back on the road with confidence.
Crosswinds, passing trucks, or shifting cargo won’t wear you out as fast. By tightening up how the chassis moves side to side, this rear bar helps you hold your line with less effort. The steering stays steady, the ride stays level, and even long highway drives feel more relaxed.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hello everybody. This is Jeff at etrailer.com. Today, we're gonna take a look at the Roadmaster rear anti-sway bar. Now, this is a custom-fit part. It is designed to fit the 2018 and newer Ram 4500 and 5500 Chassis Cab model trucks. And on a custom-fit like, part like this, I do recommend for you to go to our website, use the fit guide, put in your year and model vehicle, and it'll show if this will work for your application.
Now, this will help minimize any side to side movement to improve overall stability of your vehicle. This will let you execute turns and quick maneuvers with confidence, and allows for a nice, level ride even on irregular surfaces. It'll even reduce driver fatigue cause it'll minimize the effort that's required to keep your vehicle in line. This will also diminish effects of crosswinds, passing motors and shifting cargo. Now, this is designed to fit your vehicle, work in conjunction with its suspension system.
Basically, it'll attach to your rear axle and to the chassis. And it uses the weight of the axle to brace the frame as it shifts and turns. It is engineered to avoid interference with most of your popular aftermarket add-ons and accessories. And it is made with polyurethane bushings instead of the standard rubber variety, gives you a lot longer-lasting system. The polyurethane is much more durable and resistant to damage that can be caused by oil, gas, and ozone.
It does mean less wear, which means less give in the system and better support. And the bar itself is constructed of a thick 4140 chromoly steel for superior strength. The bar diameter on this is 1 3/4 inches. And if you notice everything, it includes everything laid out here on the table. It includes all the heavy gauge mounting hardware, all the hardware to install it, nice set of detailed, easy to follow instructions.
And also, what's nice, they give you a little tub of bushing lubricant to apply to the polyurethane bushings when you install them, and even a little tube of Loctite to use on the bolts. Now, these parts are made in the USA. But that should do it for the review on the Roadmaster rear anti-sway bar..
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!