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Nothing takes the fun out of driving like a rig that leans every time you corner or gets pushed around by the wind. The Roadmaster Rear Anti-Sway Bar ties the rear axle to the frame to balance weight transfer and reduce body roll. The 1-1/2" diameter bar made from thick 4140 chromoly steel adds serious torsional stiffness—nearly 30 percent better at resisting sway than standard steel setups—so you can take turns and quick maneuvers with confidence.
Crosswinds and big rigs shouldn’t dictate how you drive. By minimizing side-to-side movement, this rear bar keeps your rig level and predictable, even on uneven roads or in gusty conditions. That means fewer steering corrections and less “tail wagging,” giving you a calmer, more controlled ride mile after mile.
White-knuckling the wheel for hours wears you out fast. The Roadmaster bar keeps the chassis in line with the axle so you’re not constantly fighting sway or lean. The result is steadier tracking and a level ride that takes the stress out of long hauls and makes every mile smoother.
This system replaces standard rubber bushings with polyurethane, a material that stands up to oil, gasoline, and ozone without breaking down. That durability means less give in the system and more consistent performance over time. The kit includes heavy-gauge mounting hardware, bushing lubricant, and easy-to-follow instructions, so you can bolt it on without drilling.
Engineered to avoid interference with most popular aftermarket accessories, the Roadmaster Rear Anti-Sway Bar plays well with airbags or helper springs. Add a front sway bar or steering stabilizer later for even greater control and all-around stability.
Customer Satisfaction Score:
60% were satisfied with this product
40% of customers were not satisfied
Ratings & Reviews
I love this sway bar, and love the service and overall experience with etrailer. My F350 came with factory sway bars front and rear, and I'd replaced the rear bar several years ago, and was impressed with the difference it made. So, more recently I ordered the front bar to replace the smaller factory unit, and it again made a wonderful change for the better. Our Bigfoot truck camper is tall and heavy, but our rig handles wonderfully and has essentially no sway or rock in traffic or on bumpy roads. I highly recommend this sway bar.
1 of the best purchased I've made for my Fleetwood Discovery. All wandering is now gone. Took an afternoon to install (I'm a retired mechanic) and am very pleased with the outcome. I also purchased an Steering Stabilizer Shock a year before and I improved wandering maybe %25. Both purchases arrived (in Alaska) promptly and in good condition. I Will purchase from eTrailer.com again when needed.
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.
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
This is a must have for your Motorhome. What a difference in the ride of the coach through the highway washes, the side winds and the side drift of the big rigs. This bar reduces the coach movement by as much as 80% I would say. The installation is easy for someone who is mechanically inclined and still doable for DYIer as long as you have the tools ( standard 1/2” drive tool set, low speed high torque drill for the holes in the frame and a 250 plus ftlbs torque wrench). I would highly recommend this Anti-Sway Bar.
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.
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.
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.
Excellent high quality product made a big difference in handling with heavy Artic Fox camper
Give poor rating regarding installation instructions
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.
Fast shipping! Exactly what I needed. Knowledge staff! Thanks Justin! Will be ordering more from etrailer.
Shipped ahead of time. Thanks Tyler!
I recently installed front and rear anti sway bars purchased from e trailor on my 2021 chevy express class c. The order was processed and shipped immediately and arrived within a couple of days. They were easy to install, I was able to do it without help. Although I have not been able to test them thoroughly yet so far they seem to cut back on the bouncing and rolling that was occurring with the OEM parts. I plan to purchase upgraded shocks from e trailor as my next update. —joe
Looks very well built, as is with all the Roadmaster products I have used.
Roadmaster rear anti-sway bar made a noticeable difference on my class C Chevrolet 4500. Easy installation. I recommend it.
Very nice High Quality Anti-Sway Bar!
I picked up the end links and fabricated the frame mounts for the end links.
Turned out great and made a very significant improvement in the ride and stability.
Easy to install by myself in the driveway. I replaced both the front and rear anti-sway bars and the improved handling characteristics were noticeable immediately. Fantastic product!
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Kd
8/2/2024
Worked out well cross country? Was not a significant increase over stock diameter, but it was a good price, and those small diameter increases are supposed to help. Did not notice a drastic improvement, however.