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Few things make a truck or RV feel more unstable than leaning hard in curves or rocking through turns. The Roadmaster Rear Anti-Sway Bar ties the rear axle to the frame to balance weight transfer and reduce body roll. With its 1-3/8" diameter 4140 chromoly steel bar, it’s nearly 30 percent better at resisting sway than typical setups. The thicker bar keeps the ride level and predictable through corners, quick maneuvers, and rough roads.
Strong gusts or passing semis can push a big vehicle around. This bar braces the frame using the weight of the rear axle so side-to-side motion is minimized. It lessens the effects of shifting cargo and crosswinds, helping you hold your line with less steering correction. The result is calmer, safer highway driving with better stability in all conditions.
Fighting sway mile after mile wears you out. By cutting down on the motion that forces you to correct the wheel, this system makes long hauls easier. The ride stays level, tracking stays straight, and you arrive feeling far less tense.
This setup uses 4140 chromoly steel—stronger and harder than standard 1020 steel—for long-term durability. Polyurethane bushings resist oil, gasoline, and ozone, so they won’t degrade or squish out like rubber. That means less flex, more consistent support, and a system that stays tight and dependable over time.
No drilling is needed. The bar bolts directly to the frame and rear axle with the included heavy-gauge mounting hardware, clear instructions, and bushing lubricant. It’s engineered to avoid interference with most aftermarket gear, so you can bolt it on and feel the difference right away.
Customer Satisfaction Score:
86% were satisfied with this product
14% of customers were not satisfied
Ratings & Reviews
Easy installation ,done by myself laying on my back in the driveway only took about 1 1/2 hours to do. I have a lift but didn't use it and I think it was easier on the ground for just one person. Sway bar made a big difference in the drivability of my 2003 E350 pleasure way class B
I'll upgrade the front factory bar to the HD Roadmaster bar soon
If you have issues with the handling of your Ford pleasure way start with this sway bar
After a year of usage, I couldn't be happier with the Roadmaster front and rear anti-sway bar kits. The rear kit for my W22 chassy, the mounting hardward would not fit properly. I call Roadmaster directly and they custom built the mounts, painted, and shipped within days.
Super quality product build. However it is made for ford transit dually. I have single rear tires. Worked with road master rep to select the correct sway bar for my van.. RM82EQ
I Installed the bar in my Ram promaster HR 2500 and it’s an incredible difference on twisty mountain roads. I highly recommend it.
After waiting 3 weeks the swaybar kit was drop-shipped from the factory. Received and discovered the bushing inserts were the wrong size (too small) for the bolts that were sent. Contacted Roadmaster support and provided them a photo and invoice as requested. The replacement inserts were approved and shipped out. I got metric bolts to go with the inserts I received. I will save the replacements for additional replacements.
The install was fairly straight forward.
Haven't had a chance to tow the 5th-wheel yet.
a quick fix it to install sway bars front and rear.
I did this and just came home from 2400 mile trip.
installed rear only before we left, then at our destination installed front.
the drive back it handles wayyy better and it sits level now.
""your results may very-use at your own risk. ""
from etrailer.com
rear = RoadMaster 1259-109.
front = RoadMaster RM-1259-105 with RM-590063-00 bracket kit.
i'm sure over time they will flex and stress and start to lien again.
But for now it looks much happier. ( and level )
and i'm very happier with performance and drivability
Seems the big bars help distribute the load to both sides,
you can drive it with one hand now.
and when a truck passes, it's very manageable.
( this could be part the tires on it )
these can be installed in about 6 hours pretty easy.
The hardest thing is drilling the 8 holes in frame. ( 4 front 4 rear. )
We had to shift 2 brake lines over via and small bracket and covers lines with old fuel like to act as wear buffer.
The anti sway bar is a big improvement when the truck bed camper is on. The installation took a bit longer than expected because the frame brackets don’t fit around an aftermarket B&W gooseneck hitch. I had to fabricate new top brackets and drill out the bottom brackets to widen the bolt pattern. Keep this in mind if you have a gooseneck hitch.
Received the product in a timely manner. The shipping company used I’d give a no star rating. I received the anti-sway bar bare out of a box or wrapper with the installation part box and a cut out piece of cardboard with the shipping label on it taped to the bare bar with about five yards of packing tape. The bar was scuffed, scratched and chipped with the RoadMaster label destroyed. I realize it’s going to be installed under the front of my motorhome but as much as it costed I would like to be the one to scratch and scuff it. If I was a company installing this on a customers vehicle I’d return it. I do not believe it was shipped from etrailer in this condition.
Great buying experience with ETrailer. Fast shipping and quality constructed part. Noticeable difference in controlling body sway. Very pleased with the bar and highly recommend Etrailer.
After about a year with both the Roadmaster Rear Anti-Sway Bar and the TorkLift StableLoad Upper Overload Spring Upgrade on our truck camper setup, my experience has been mixed.
With the StableLoads, some of the mounting screws eventually fell out. I contacted etrailer expecting the issue to be handled under warranty, but instead of taking care of the replacement directly, I was referred to the manufacturer. Considering the age of the product and that it was purchased through etrailer, I was disappointed with how the warranty issue was handled.
As for the Roadmaster 1-1/2" rear anti-sway bar, it is a very solid and well-built product, but in our particular application I honestly haven't noticed a major difference in body roll while taking turns with the camper loaded. I have driven the truck both with and without it, and the improvement was much less noticeable than I expected.
Neither product is necessarily bad, but based on our experience, the improvement in handling hasn't been significant enough for me to strongly recommend them given the cost.
2025 Sprinter 2500 low roof WITH factory sway bar. Added this bar to control the terrible handling at the rear of these vans and it absolutely takes care of that. Be aware that you 100% need the retro-fit kit for this bar to be installed as the factory sway bar end links will NOT work. The retrofit kit that you need is the RM-590064-00.
RM-1109-121 Rear Sway bar for 85 Chevyvan G30 RV. Install was pretty straightforward. I would mount the brackets to the frame first and then the sway bar to the axle. It’s easier to drill the holes without the sway bar getting in the way.
Before I replaced the shocks and upgraded the from sway bar and added the rear sway bar my G30 Chevyvan Winnebago was a wallow wagon. It took 110% focus to drive. Now it drives like a regular vehicle. Smooth. No leaning over when cornering. It’s night and day.
Excellent high quality product made a big difference in handling with heavy Artic Fox camper
Give poor rating regarding installation instructions
Great instructions and nice, high quality fasteners.
Fitment was great and only minor adjustments to my Air lift air bags was needed.
I have a 2013 Ram 3500 Dually with:
-Torklift 30K hitch
-5” Exhaust
-Air lift 7500XL air bags.
The lower brackets for the air bags needed to be moved slightly and I had to cut the excess bolt off on the passenger side.
Delivered quickly and works well!
A great product, easy to install and great service from
Amy J and ETrailer. One suggestion, the cup of lubricant cap came off and the cup was full of washers. If the cup was put in a zip lock bag by itself would solve the problem.
It helps to drop the spare, heat shield for the spare. Not bad if you have some mechanical ability and plenty of tools...
Really helps to eliminate sway of truck camper!
Best improvement for my 2018 ram 3500 dually. No more rolling when I carry my Host Cascade. Big difference I'm very happy
Très satisfaits de mon achat, avec mon campeur bigfoot la différence est notable
(Very satisfied with my purchase, with my bigfoot camper the difference is noticeable)
The '18 Ram 3500 DRW does not come with a rear axle factory anti-sway bar. With a 5,380 lb. payload capacity, a healthy slide-in camper is suitable for the truck. However, the additional SWAY became noticeable. After installing the anti-sway bar (by myself) the rate of sway is much slower and typical jounce is softer. Did it help? Yes, absolutely!!
Was an fairly easy install with two people , has held up well so far . Helped stop sway with my top heavy truck camper load. At the time it was the only sway bar that fit the ram 3500 with 6.4 gas hemi due to exhaust system interference with other brands .
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Michael
6/7/2022
Sway bar has held up well since installation.