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.
Body roll and rear sway can make any drive feel unstable. The 1-1/4" Roadmaster Rear Anti-Sway Bar ties the rear axle to the frame to balance weight transfer and keep the ride level. It minimizes side-to-side movement, helping your vehicle stay planted through turns, crosswinds, and uneven pavement. That tighter connection between the frame and axle means more predictable handling and a big drop in sway and lean.

A steady ride isn’t just about comfort—it keeps you more relaxed on long trips. By cutting down on body roll and side shift, this bar reduces the steering corrections you’d normally make when wind or passing traffic pushes the vehicle around. The result is stable, confident tracking that takes the stress out of highway miles.
This setup is built from 4140 chromoly steel, a chromium-molybdenum alloy that’s much stronger than standard 1020 steel. The thick 1-1/4" bar resists twist and flex, providing up to 30% better sway control compared to lighter designs. It’s made to deliver long-term rigidity and dependable performance under heavy loads.
Instead of soft rubber, Roadmaster uses polyurethane bushings that hold up against oil, gasoline, and ozone. They don’t squish or deteriorate, which means less give in the system and more consistent control over time. Lubricated bushings allow just enough flex for smooth articulation without sacrificing stability.

The kit includes all heavy-gauge mounting hardware, clear instructions, and bushing lubricant. It bolts directly to the rear axle and chassis with no drilling required, and it’s designed to work alongside popular suspension upgrades like air bags or helper springs.
Bar diameter: 1-1/4" | Material: 4140 chromoly steel | Mounting hardware and lubricant included | Limited Lifetime Warranty
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews

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!

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.
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.









Marty S.
6/15/2022
It is still doing its job and I am more than happy with the sway reduction it provides