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A more stable ride starts with your suspension. This anti-sway bar kit helps reduce body roll and keeps your vehicle feeling more planted through curves and crosswinds. That means a calmer drive where you're less tired after long trips.
Long highway drives can become tiring when your vehicle leans through curves or gets pushed around by crosswinds and passing traffic. This rear anti-sway bar helps reduce body roll, improve tracking, and increase cornering control so your suspension feels more planted through changing road conditions. Its thicker diameter than many factory sway bars increases torsional roll stiffness, helping your vehicle settle more quickly after weight shifts and making long trips feel calmer behind the wheel.
Handling improvements depend on more than adding a replacement bar. This anti-sway bar uses 4140 chromoly steel to increase strength and durability, while polyurethane bushings resist gas, oil, ozone, abrasion, and heavy loads better than standard rubber bushings. Those design choices help your suspension maintain consistent roll control through curves, uneven pavement, and changing road conditions, keeping your vehicle composed as the miles add up.
Suspension components spend their lives exposed to road debris and the elements, so lasting protection matters. A powder-coated finish helps resist wear and corrosion while the custom-fit design integrates with your suspension system to improve overall handling. Your anti-sway bar continues delivering predictable roll control trip after trip, helping your vehicle retain the same planted feel throughout years of service.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi everybody. Andy here with etrailer. Let's take a quick look at this Roadmaster rear anti-sway bar. Now this anti-sway bar has been designed to fit your 2018 to 2021 Freightliner Sprinter 3500 Class C, and then your 2018 to current Mercedes-Benz Sprinter 3500 Class C. Now on custom fit parts such as this anti-sway bar, I do recommend going through our vehicle fit guide here at etrailer. Just pop in the year, make, and model of your vehicle, answer any other questions that it might have for you, 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 kit, it's designed to make your vehicle feel more stable and controlled on the road. By reducing body roll, this is going to help keep your vehicle flatter when going through curves, dealing with crosswinds or traveling over uneven roads. Now that added stability can also improve tracking while you're on the highway. And you're not gonna be constantly making small steering corrections while you're going down the road to keep your vehicle where you want it. Now a big part of that improvement comes from the sway bar's increased diameter compared with many factory bars.
This thicker bar is gonna give you greater resistance to twisting, which is going to help control the side to side body movement and give your vehicle a more planted feel. It's also built to handle demanding use. This sway bar is made from strong 4140 chromoly steel and protected by a black powder coat finish to help resist wear and corrosion. This also features durable polyurethane bushings that are designed to withstand heavy loads while resisting damage from gas, oil, ozone and abrasions. The diameter of this bar, as we have listed here in our instructions, is 1 1/2 inches.
And it includes everything that you see here on my table. This is gonna be a solid upgrade if you're looking for flatter handling, better highway stability, and more predictable suspension performance, especially when dealing with heavy loads, winding roads, cross winds, or uneven pavement. Now if you would like some help getting this installed, on this product page underneath the photo section, we have a link that will take you to our installer locator. Click that link, answer the questions that it has for you, and that locator will find an installer in your area that etrailer has partnered with to install this for you. Well, again, my name's Andy.
Thank you for joining me.
Ratings & Reviews
Fred
8/15/2026
Excellent it works great
Jerred H.
8/16/2026
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?
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.
Gwendolyn Y.
4/28/2025
High-five on the install, Curtis! Also, thanks for sharing all the pictures and showing all the angles of the sway bar. They are really helpful for anyone looking to tackle this install themselves at home!
Brooke M.
6/17/2025
So glad to hear that, Dimitrios! Thanks for including a photo, too.
Michael
3/25/2026
After a year the system is working great. It has made the driving much safer and smoother.
Gwendolyn Y.
3/25/2026
Gwendolyn Y.
3/7/2025
Sounds like a much smoother drive, Riley! I looked up your camper to see how tall it is and I can see exactly why its called a Bigfoot. What's been your favorite place you've traveled to so far with the camper?
Riley
3/6/2026
The two Roadmastercsway bars weve been using continue to impress and perform like they did on day one. Driving back across the country with some days having stiff criswinds continually we rode comfortably and never had handling or steering issues. I remain adamant that these are undoubtedly the best products on the market for this application and welcome any questions. For reference my truck is a 2018 F350 crew cab DRW, 6.7 diesel 4x4 long bed with Bigfoot 3000 series truck camper. Get the Roadmasters!
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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!