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.
Nothing feels worse than that side-to-side rocking when you hit a curve or get passed by a big rig. The Roadmaster Rear Anti-Sway Bar ties the rear axle to the frame to balance weight transfer through turns and uneven surfaces. Its 1-1/4" diameter 4140 chromoly steel bar is thick and tough, resisting twist for a level, planted ride. The setup minimizes body roll so the rig stays steady and predictable no matter what the road or wind throws at you.

When driving for hours, constant steering corrections wear you out fast. This bar cuts out that tiring sway by keeping the rear of the vehicle in line. It works like a horizontal shock absorber—smoothing side-to-side motion so you don’t have to fight the wheel in crosswinds or while passing semis. You’ll feel more relaxed behind the wheel and fresher when you reach your stop.
This isn’t basic stamped steel and rubber. The 4140 chromoly construction delivers superior strength—harder and stronger than standard 1020 steel—and the polyurethane bushings resist oil, gasoline, and ozone. That means they won’t squish out or crack like rubber, keeping the system firm and consistent for the long haul. Less wear means better support and smoother performance over time.

Installation is simple with the included heavy-gauge hardware, instructions, and bushing lube. The bar and brackets mount right to the axle and chassis without drilling, and it’s designed to work around most aftermarket suspension gear. You can even pair it with a front sway bar for added stability if your setup allows. Once bolted up, you’ll spend less time wrenching and more time enjoying a solid, confident drive.
Ratings & Reviews

Craig
7/31/2022
Sold truck 2 months ago. Worked great with a Host Mammoth on its back

Katrina D.
9/18/2023
It seems that these were in fact cross threaded. What problem we usually see is that if the threads are not lining up, people using an impact will not be aware of the cross threading and will install the bolts all the way, leading to further complications. However, it seems like you are not having that same type of issue. I have reached out to the manufacturer for you and they have said that this is not a common issue for this system. If you have already contacted Roadmaster, have you received information from the manufacturer about your specific situation?

Robert
5/6/2023
I drive a 1 ton diesel and pull a 8000 # trailer. This anti sway bar makes this combination travel with none of the previous uncomfortable problems. I wonder why my truck came without a sway bar. Recommend to other Dodge owners.

Travis S.
3/15/2018
Great... Works as advertised

Larry G.
3/12/2018
Still works well, does have clunk when you hit a bump. Talked with roadmaster and we could not identify cause. Make sure brackets are tight to frame, they will move.

Kevin
7/1/2024
It works as well as it always has. Never a problem and helps hold my camper upright.

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!


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?
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.












Dale C.
12/18/2021
Great