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Few things make driving more tiring than constant side-to-side rocking. The Roadmaster Rear Anti-Sway Bar – 1-1/2" Diameter ties the rear axle to the frame to balance weight transfer through corners. The 1-1/2" thick 4140 chromoly steel bar resists twist far better than stock, cutting down on lean and keeping the ride level through turns or rough pavement. The result is a steadier, more predictable feel when maneuvering or changing lanes.

Crosswinds or passing semis don’t have to feel like a fight for control. This bar uses the axle to brace the chassis, reducing side push and sway when wind or road conditions shift. That means straighter tracking with less steering correction, so long drives feel calmer and more controlled all the way down the highway.
The bar is built from 4140 chromoly steel—much stronger and stiffer than standard 1020 steel—and paired with polyurethane bushings that outlast rubber by resisting oil, gasoline, and ozone damage. That combination keeps flex in check and performance consistent over time. Less wear means less slop, tighter handling, and years of dependable use.

Installation stays straightforward thanks to the included heavy-gauge mounting hardware, pre-lubed bushings, and clear instructions. It bolts up directly to the axle and frame with no drilling needed, so you can get a solid upgrade without complicated modifications.
If you’re already running upgraded shocks or a front anti-sway bar, this rear setup ties everything together for maximum stability. It’s engineered to avoid interference with most aftermarket gear, giving you a smooth foundation for a complete suspension system that keeps your rig balanced from front to back.
Customer Satisfaction Score:
80% were satisfied with this product
20% of customers were not satisfied
Ratings & Reviews

Sal A.
1/24/2017
EXCELLENT

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?
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Mike L.
1/6/2026
We're happy to hear that!!! Glad we could help you....