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Nothing makes a drive feel sketchier than leaning hard through corners or quick maneuvers. The 1-3/4" diameter Roadmaster front anti-sway bar ties the front axle to the chassis to balance weight transfer and cut down on side-to-side movement. It uses the axle’s own weight to brace the frame as it shifts in turns, keeping things level and predictable when the road isn’t.
Crosswinds and passing traffic don’t have to mean a white-knuckle grip on the wheel. This setup keeps the vehicle centered and steady by limiting sway and body roll. It reduces the effort needed to stay in your lane, so long highway runs or uneven pavement feel more relaxed.
This isn’t a lightweight bar—it’s built from thick 4140 chromoly steel, a chromium-molybdenum alloy that’s stronger and harder than typical 1020 steel. The bar is heat treated and designed for heavy-duty 16,000 lb and up applications. The larger diameter and high-strength material make it the most robust option in its class for resisting sway and flex.
Instead of soft rubber, this system uses polyurethane bushings that resist wear from oil, gasoline, and ozone. That means less squish, more consistent support, and a longer-lasting setup. It includes heavy-gauge mounting hardware, bushing lubricant, and easy-to-follow instructions for straightforward, no-drill installation.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everybody, Andy here with etrailer.com. Let's take a real quick look at this Roadmaster front anti-sway bar. Now, this anti-sway bar has been designed to fit your 2011 to 2014 Ford F-350, F-450, and F-550 cabin chassis, and then the cabin chassis class C, the cabin chassis type three emergency vehicle, and then the 2015 to 2018 Ford F-450 cabin chassis. And then finally, the 2015 and newer Ford F-550 cabin chassis class C and cabin chassis type three emergency vehicle. On custom-fit parts such as this front anti-sway bar, I do recommend taking advantage of our vehicle fit guide. Simply input the year, make, and model of your vehicle, and our fit guide will confirm if this will work for you or if we have something comparable that will work for you.
Now, this anti-sway bar does for side to side movement, what a good pair of shocks does for up and down motion. You're gonna notice a marked improvement in your vehicle's stability as the bar works to balance weight transfer and reduce body roll. This anti-sway bar acts as a length between your vehicle's frame and its front axle using the axle as a brace to more effectively balance the shifting weight of your vehicle as you maneuver it. The lubricated bushings are going to allow just enough pivot and rotation to compensate for the pressure placed on one side of your vehicle when it goes into sudden maneuvers, hits cross winds, or encounter shifting weights. Now, you are gonna be able to execute turns and quick maneuvers with confidence.
This is going to give you a level ride even on irregular surfaces, and this is gonna reduce driver fatigue by minimizing the effort required to keep your vehicle in line. This has also been designed and engineered to avoid interference with most popular aftermarket add-ons and accessories and is heat-treated for heavy duty 16,000 pound and up applications. This is made here with polyurethane bushings instead of the standard rubber variety for a longer lasting system. Polyurethane is durable and resistant to damage caused by oil, gasoline, and ozone. So as you know, less wear means less give in the system and better overall support.
Now, this bar is made of 4140 chrome-moly and it is a chromium and molybdenum, if I said that correctly, steel alloy. So as you might know, this type of steel is considerably harder and stronger than the standard 1020 steel that is typically used in anti-sway applications. In addition, the larger diameter of this bar, which is 1 3/4 inches in diameter, that larger diameter is going to increase its torsional roll stiffness. So the result is gonna be a bar that is not only stronger than the competition, but also nearly 30% better at resisting sway. Again, the polyurethane bushings and the grommets used at the attachment points are durable, yet flexible.
That's gonna ensure that the system is neither so rigid nor so malleable that it becomes ineffective. This includes everything that you see here on my table. You're gonna get the brackets for the bushings, hardware here. You're also going to get some bushing lubricant and Loctite. This is actually called Vibra-Tite And then of course, a set of instructions to guide you through the installation process. Of course, this is gonna work with the rear anti-sway bar that's sold separately, giving you an absolute stability. So if you're interested in not only this front but also the rear, again, go through our vehicle fit guide and our fit guide will point you to the rear one that will work for you as well. This does have a limited lifetime warranty from Roadmaster. If you do pick this up, we would love to hear back from you regarding how the installation went and your experience with having this installed on your vehicle. So you can share your experiences with us by dropping a comment or leaving a review on this product page. If you have any other additional questions that I didn't cover for you today, don't hesitate to reach back out to us either by phone, email, or chat. We do wanna make sure that you're getting exactly what you want and need. Well, let's gonna wrap up our look today. I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me.
Customer Satisfaction Score:
94% were satisfied with this product
6% of customers were not satisfied
Ratings & Reviews
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!
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.
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.
I have a hard side slide in camper in the back of my pickup. This is the first time I installed an Anti-Sway Bar of any kind. It took me about 6 hours to install. But it works, and it works really well. I'm glad I took the time to install it.
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.
Grate stuff. Easy to bolt up and figure out. Drive quality improved dramatically and less sway with trailers.
Just in the kit with the grease and red lock tight the hardware washers were one size to large so I got the right ones and installed all is well.
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
you guys did great package was damage RM-1139-149
Roadmaster Rear Anti-Sway Bar - 1-5/8" Diameter the sway bar itself
I Installed the bar in my Ram promaster HR 2500 and it’s an incredible difference on twisty mountain roads. I highly recommend it.
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.
The products itself is good. Works well. But you would think when you spend $800 for something, the directions could be very detailed. There could be a complete video of it being installed. They don't give you specs for torquing any of the bolts and some very lousy pictures with a small amount of instruction. You can do better Roadmaster you want to charge me a lot of money for something then give me great detail on in installing it as well.
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.
I prefer to purchase direct from most manufacturers due to tech support and service. However I find myself purchasing from etrailer.com more and more due to the positive experience, expert tech chat advice, fast shipping and great prices to name just a few. It makes all the difference knowing that you are communicating with a real person and not AI. The Roadmaster 1 3/8” rear sway bar has been my most effective purchase for my truck to date. The SuperSprings SuperSway Stops are right up there in effectiveness as with the rear sway bar. The rear sway bar and SuperSprings SuperSway Stops were very easy to install and I feel like I am driving a different truck. In combination, the two purchases have made the truck and camper feel like one vehicle; no longer does it feel like a truck with something in the bed. VERY stable on turns, twists, hills and angles. I cannot recommend these products enough.
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.
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.
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.
I have carried a truck camper for 7 years with just Timbrin blocks also from Etrailer and finally made the move to Roadmaster anti sway bars front and rear. Planning a trip to the west coast from Georgia next year and wanted all the help I can get for stability on the mountain roads. Have yet to test but Im sure it will be a noticeable improvement. When my wife takes the wheel so I can have a break she would see-saw the steering wheel to balance the load and it drove me insane. Hoping for relief for both of us.
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.
It worked out Great ! I would like to install steering stabilizer if you can let me know which one you recommend for my vehicle . 2021 Thor Omni Super C on Ford F550 4x4 Chasis. Thanks
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Mike L.
2/19/2026
I'd be happy to help, you'll want to use # RM55VR. You can check it out using the link I've provided!