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  1. Anti-Sway Bars
  2. Roadmaster
  3. Anti-Sway Bar
  4. Rear
  5. 1-1/8 Inch Diameter
  6. Steel w Polyurethane Bushing
Roadmaster Rear Anti-Sway Bar - 1-1/8" Diameter

Roadmaster Rear Anti-Sway Bar - 1-1/8" Diameter

Item # RM-1129-135
Retail:$390.17
Our Price: $370.29
You Save: $19.88
Anti-Sway Bars

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Shipping Weight: 28 lbs
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Minimize sway and driver fatigue by improving the stability and driveability of your vehicle. The bar on this sturdy, effective anti-sway system mounts to the rear axle and to the frame to balance weight transfer and reduce body roll. 1-800-940-8924 to order Roadmaster anti-sway bars part number RM-1129-135 or order online at etrailer.com. Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Roadmaster Rear Anti-Sway Bar - 1-1/8" Diameter. Anti-Sway Bars reviews from real customers.
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Roadmaster Anti-Sway Bars - RM-1129-135

  • Anti-Sway Bar
  • Roadmaster
  • Rear
  • 1-1/8 Inch Diameter
  • Steel w Polyurethane Bushing

Minimize sway and driver fatigue by improving the stability and driveability of your vehicle. The bar on this sturdy, effective anti-sway system mounts to the rear axle and to the frame to balance weight transfer and reduce body roll.


Features:

  • Minimizes side-to-side movement to improve overall stability of your vehicle
    • Lets you execute turns and quick maneuvers with confidence
    • Allows for a level ride, even on irregular surfaces
    • Reduces driver fatigue - minimizes effort required to keep your vehicle in line
  • Diminishes effects of crosswinds, passing motorists and shifting cargo
  • Designed to fit your vehicle and work in conjunction with its suspension system
    • Attaches to rear axle and to chassis - uses weight of axle to brace frame as it shifts in turns
    • Engineered to avoid interference with most popular aftermarket add-ons and accessories
  • Made 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
    • Less wear means less give in the system and better support
  • Constructed of thick 4140 chromoly steel for superior strength
  • Includes heavy-gauge mounting hardware, easy-to-follow instructions and bushing lubricant
  • Made in the USA


Specs:

  • Bar diameter: 1-1/8"
  • Limited Lifetime Warranty


Roadmaster Anti-Sway Bar Installed

Benefits of an Anti-Sway System

The Roadmaster anti-sway bar does for side-to-side movement what a good pair of shocks does for up-and-down motion. You will notice a marked improvement in your vehicle's stability as the bar works to balance weight transfer and reduce body roll. The anti-sway bar acts as a link between your vehicle's frame and its rear axle, using the axle as a brace to more effectively balance the shifting weight of your vehicle as you maneuver it. Lubricated bushings 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 crosswinds or encounters shifting weights.


Roadmaster Anti-Sway Polyurethane Bushings

Superior Construction

The Roadmaster anti-sway bar is made of 4140 chromoly, a chromium and molybdenum steel alloy. 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 the bar increases its torsional roll stiffness. The result is a bar that is not only stronger than the competition, but also nearly 30 percent better at resisting sway. The polyurethane bushings and grommets used at the attachment points are durable yet flexible, ensuring that the system is neither so rigid nor so malleable that it becomes ineffective.



1129-135 Road Master Anti-Sway Bar - Rear

Installation Details RM-1129-135 Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Roadmaster Rear Anti-Sway Bar - 1-1/8" Diameter - RM-1129-135

Average Customer Rating:  4.8 out of 5 stars   (1843 Customer Reviews)

Minimize sway and driver fatigue by improving the stability and driveability of your vehicle. The bar on this sturdy, effective anti-sway system mounts to the rear axle and to the frame to balance weight transfer and reduce body roll.

by:
2016 Dodge Ram Pickup

This sway bar made a great improvement to the handling and ride of my 2016 RAM 1500 4x4 over the undersized sway bar (my opinion) that the factory installs. I recommend it for anyone no matter how you use your truck.



by:

Great simple installation. Looks great with my Banks Differential Cover. So much more heavy duty than stock. Truck rolls so smooth down the road, like it should. Installation about an hour, worst part was taking the old factory stuff off. Glad I did this improvement! Well worth the $.



by:

Quick easy bolt on, major improvement

Douglas

3/2/2024

This piece is freaking awesome. Dont waste your money on others. But the best product once, not after you have taken a different direction. Flat handling, great for towing, virtually eliminates sway. Could not be happier. Highly recommend



by:
2018 Ram 1500

The sway bar assemble was very easy to assemble. The directions were clear and all the parts were included. I would rate this as a critically needed addition if you plan to carry a camper in the bed of your pickup.



by:

Excellent product, great service from start to finish. This is the anti-sway bar the truck should have had from the factory.

Jerry B.

4/1/2023

It was great, never a complaint. I sold the truck about 6 months ago



by:

I have 35” tires and this bar really helps truck stay level in the corners even when loaded
Have urethane bushings in front too



by:
2016 Ram 2500

Great customer service. Part fit perfect. Great communication

Kg

4/24/2023

Sorry to say did not do the job. Had to buy another brand. replaced with hellwig bigwig Its just sitting in the garage. Costs to much to return to sender….



by:

Mounting hardware was incorrect for a 2019 Ram Limited with air leveling option. Left message with Roadmaster but no response.
Sway bar quality is excellent and mounted with OE hardware.



by:
Roadmaster

The sway bar installed quickly and with little problem. It totally controls body roll on this truck. I would have given a higher score except the end links provided in the kit from Roadmaster failed within seven months, or about 6000 miles. I replaced them with Moog. All quiet now.



by:

best aftermarket sway bar out there, very happy with the product, night and day difference feel on my truck.



by:
Dodge Ram Pickup

This was very easy to install.. took about 30 mins by myself! Really was surprised in the difference it made in the handling of my ram 1500. Great purchase



by:
2018 Ram 1500

this sway bar kicks ass i am a niase ceertified , thats befoe ASE in 1974 it is a noticale better ride ,money well spent hang it out on an off ramp stays flat 4 stars on this upgrade



by:

This review is for the customer service . The women that answer the phones and walked me through a return package process were the NICEST and most helpful I’ve ever had . They were so detailed and quick to answer the phone and provide me with the answers I needed
It’s nice to speak to good people when you have an issue with a product
I will continue to use them for my stuff



by:

Jason

7/1/2022

excellent!



by:

Just got it today 6-13-22, I would say you need to work on your delivery in a better time.



by:



by:

Very good quality, bushing are heavy duty, except it to do well with a lot.



by:
2011 Ram 1500



by:



by:
2011 Ram 1500



by:

I have a 2017 Ford F350 Super Duty SRW, and we haul a heavy truck camper (Lance 1055.) I have Stable Load Uppers and HD airbags, but wanted to add a sway bar to add that extra layer of control, even though my truck has handled the camper well over the last 2 years and 10,000 miles. My truck did not come with an OEM sway bar installed, so I needed this kit that included the End Links too.

The Roadmaster Rear Sway Bar and End Links sold on etrailer are top quality products. They are robust and well made, with quality hardware to match. The product deserves a 5-star, and even unloaded, my truck handling improved right after installation, with improved cornering and no real impact on ride quality in my opinion. I have not yet loaded up our camper or towed our boat, but I have no doubt this sway bar will substantially reduce sway and will improve control and handling when the camper is loaded.

So why 4 stars and not 5?

1. I researched this product and the installation in detail. I planned on installing it myself and expected to find plenty of detail on etrailer's site, or Roadmaster's site, or the internet. My most pressing question was about where to mount the end links, and the orientation of the sway bar arms since I wouldn't be using the OEM end links. That information was no where to be found on the etrailer site, Roadmaster's site, or in any installation manuals. For a product and supplier that has likely sold lots of these to Ford Super Duty owners, I was surprised to find how little info was out there. The installation video on the etrailer site was helpful, but did not include any information for the end links, as they had a 2015 Super Duty and used the OEM end links already installed. I contacted etrailer and they told me to contact Roadmaster for more info on where to locate the end links with this kit.

2. I contacted Roadmaster. They told me they had no instructions and that despite my truck already having the cut-outs for the OEM bracket that attaches the OEM end links to the frame, that none of those holes may work for me. So they suggested I connect the sway bar brackets to the axle first and then see where the arms would line up with the end links. The tech also suggested that it wasn't critical that the end links were perpendicular
to the frame, but that I should try install the end links to allow the arm of the sway bar to hand as close to parallel as possible. No bueno. When I installed this the 14" end links (center hole to center hole) didn't allow for the arms to hang parallel to the frame. And I don't think it matters as the orientation of my sway bar and the arms looks about like every video or picture I could find on the internet of this year/model truck and this sway bar kit. It seems to function fine.

3. Installing it was a bear, especially the way they instructed me to. And I had to make some modifications to fit my truck, as the sway bar arms were rubbing up against my airbag mounting brackets. I got it installed, but the thin instructions turned what should have been a 60 minute job into 2 1/2 hours. A bit frustrating.

All in all, this will do the job intended and will provide me with peace of mind next time we load our camper. I am a bit frustrated that there were zero installation instructions specific to my year/make/model of truck given it did not have an OEM sway bar and the end links had to be installed with a bit of guesswork. You will also note in my pictures that I had to mount the end links to the sway bar arms differently on each side to make the bar fit around my air bag mounts.



by:

This product arrived on time, and is as described in company literature. I have installed the sway bars and the sumo springs on my 2019 Ford E3 26 foot Thor motorhome. Installation is fairly straightforward. Having said that, I am a retired farmer and I am quite familiar with this type of work. Having the proper tools makes the job go much quicker and easier. Installation of the front sway bar took a little under an hour. The rear sway bar is a bit more complicated to install, but he can be easily accomplished by someone of average mechanical skills, equipped with the proper tools. I strongly recommend removing the rear wheels to facilitate installation of the springs and the sway bar. I have not driven my motorhome yet, but will be taking an extended trip in March. I am looking forward to an improved ride.



by:

Fairly easy install. Drilling the hole in the frame was decent started with a 17/64 pilot hole then the 17/32 final hole. Take your time and let the drill do the work.
Do be aware of the hole placement on the drivers side as there are brake lines and wiring there.



by:

OH My! If you are thinking about getting one for your P32 wide body. Please don’t hesitate. It REALLY Works. Take the white knuckle effect out of driving. EASY installation! Easy Ordering from etrailer. Roger helped me get through the buying process and shipped to my house in 2 days! Thank You!!



by:

This sway bar is the real deal. Easy to follow instructions but I had it installed because I'm lazy. It took one hour labor


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Show More Reviews

See what our Experts say about this Roadmaster Anti-Sway Bars

  • Recommended Front and Rear Sway Bars for a 2019 Ram 2500
    Rene, you unfortunately are not going to be able to use both air bags and SumoSprings like # SS68RR at the same time. The air bags fit inside the coil springs on the bag so there would not be room to also have the SumoSprings. Even if you were able to use the two at the same time, you'd have an unbelievably stiff ride that it would actually have negative effects. You could upgrade your rear anti-sway bar and add one in the front and that would definitely help keep you stable on the highway....
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  • Will the Roadmaster Rear Anti-Sway Bar #1129-135 Fit My 2021 Ram 1500
    I have an option for you if you are looking to enhance your suspension on your 2021 Ram 1500 but the Roadmaster Rear Anti-Sway Bar # RM-1129-135 will not be a fit. Roadmaster has not developed or confirmed an anti-sway bar for the 2019-2021 Dodge Ram 1500. The option I have for you depending on your needs is helper springs. These helper springs can be beneficial to you with support and added control with heavy loads. Depending on how much you are towing I have two recommendations. The...
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  • How to Reduce Sway on a 2016 Ram 2500 with a Lance 820 Truck Camper
    With how the Firestone Air Helper Springs, like the # F2706, will attach to the frame, you would not be able to install a Timbren # TDR2500D as well. Both of these options will mount in the same place, unfortunately. That being said, the # TDR2500D may be better for your situation than the air bags. I do typically suggest air bags as they are fully adjustable, but they can be a little lacking when under constant heavy load and are not as good at handling sway problems. Another upgrade...
    view full answer...
  • Is There a Front Anti-Sway Bar for a 2017 Ram 1500
    I do have an option for you but we only offer an upgraded rear anti-sway bar for a 2017 Ram 1500, the Roadmaster Rear Anti-Sway Bar part # RM-1129-135 which like a front anti-sway bar will work great to reduce body roll and improve stability. The only type of suspension enhancements we offer for the front are the Timbren Front Suspension Enhancement System part # TDF15004B or similar which like a sway bar, can reduce side to side rocking but admittingly won't be quite as good as an anti-sway...
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  • Recommended Rear Anti-Sway Bar for 2016 Ram 1500
    The best and only anti-sway bar we offer for a 2016 Ram 1500 is the Roadmaster Rear Anti-Sway Bar part # RM-1129-135 which replaces the factory rear anti-sway bar so there will be no fit issues. The larger diameter bar will do a better job of improving overall stability of your vehicle. It also offers a simple bolt-on installation.
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  • Reducing Sway On 2017 Ram 2500 With Factory Air Suspension And Carrying 2500LB Slide In Camper
    The Roadmaster Rear Anti-Sway Bar # RM-1129-135 will replace your factory sway bar on your 2017 Ram 2500 with a stronger bar and polyurethane bushings. If your only issue is sway this is what you need to help reduce sway. If you are also dealing with rear suspension sag the SumoSprings Rebel Custom Helper Springs # SS27GR will reduce sag and provide additional stability to reduce sway. These can be used with the sway bar listed above for increased sway reduction if you do not feel there...
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  • Comparing Rear Anti-Sway Bar with Air Bag Kit for a 2018 Ram 1500
    Installing the Roadmaster Rear Anti-Sway Bar # RM-1129-135 on your 2018 Ram 1500 will help with sway while an air bag kit like the Firestone # F2595 will not only help with that sway, but it will also help with rear sag. If you're leaning towards something that is maintenance free and helps with the sway then go with the anti-sway bar. For something that offers more control and will help with rear sag then definitely go with an air bag kit. Let me know what you're looking to get out of...
    view full answer...
  • Rear Anti-Sway Bar for 2018 Ram 2500 With 4WD
    The Roadmaster Rear Anti-Sway Bar # RM-1129-135 that fits your 2018 Ram 2500 with 4WD replaces the factory anti-sway bar, and just like the aftermarket anti-sway bars for motorhomes, they are an improved version of an anti-sway bar, made from 4140 chromoly steel which is a high-grade steel that means they are much stronger than standard steel. The anti-sway bar will be an upgrade but I also highly recommend adding air bags for additional suspension enhancement. The Firestone Ride-Rite...
    view full answer...
  • Rear Suspension Enhancement Springs For A 2022 RAM 2500 With Factory Air Suspension
    Yes, The Timbren Rear Suspension Enhancement System # TDR2500D will fit your 2022 RAM 2500 with factory air suspension. The Roadmaster Sway Bar # RM-1129-135 will not. The Timbrens will give you up to an additional 8,600 pounds of suspension support. These springs act like shock absorbers, taking the brunt of bumps and rough roads. Using these springs will not exceed the vehicle's weight-carrying capacity. I attached an installation video link below.
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  • Best Anti-Sway Bar For 2021 Ram 1500 Classic 4WD
    The best anti-sway bar for your 2021 Ram 1500 Classic 4WD is the Roadmaster option: - Roadmaster Rear Anti-Sway Bar # RM-1129-135 Reason for that is it is the thickest available at 1-1/8" diameter, which means it has higher roll stiffness to combat sway - the higher the roll stiffness the better sway control - and allows for the greatest improvement in overall handling.
    view full answer...
  • How To Eliminate Sway On a 2018 Ram 2500 With Truck Bed Camper
    The most beneficial component that you can add/upgrade to help eliminate sway is an anti-sway bar, the Roadmaster Rear Anti-Sway Bar part # RM-1129-135 in particular. The Roadmaster Rear Anti-Sway Bar will replace your factory sway bar and because it has a larger overall diameter will do a better job of helping to limit the sway you are experiencing with your truck bed camper at highway speed. The Roadmaster Rear Anti-Sway Bar also comes with polyurethane bushings that are more durable...
    view full answer...
  • Does Roadmaster Sway Bar # RM-1129-135 Come with End Links
    The Roadmaster sway bar kit part # RM-1129-135 comes with new end links. You do not need to reuse the ones from the vehicle.
    view full answer...
  • Thickest Anti-Sway Bar For 2021 Ram 1500 Classic 4WD
    The thickest anti-sway bar for your 2021 Ram 1500 Classic 4WD is indeed the 1-1/8 inch thick Roadmaster: - Roadmaster Rear Anti-Sway Bar # RM-1129-135 We don't offer Moog so I can't offer any insight into that, but the # RM-1129-135 is the thickest available for your truck.
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  • Recommended Rear Anti-Sway Bar For A 2018 Ram Rebel 1500
    The Roadmaster Rear Anti-Sway Bar # RM-1129-135 is the correct fit for your 2018 Ram 1500 and is going to come with two B315 end links. If your Ram is lifted we'll need to know by how much to find the appropriate sized end links.
    view full answer...
  • Are Upgraded End Links Needed For Roadmaster Rear Anti-Sway Bar on 2021 Ram 1500 Classic
    Upgraded end links are not something that are necessary for the Roadmaster Rear Anti-Sway Bar # RM-1129-135. It does come with end links that you'll use to replace the factory end links on your 2021 Ram 1500 Classic, and like the anti-sway bar, these are strong, as are the heavy-duty polyurethane bushings. If you feel like you need to upgrade them after some time you can, but the end links for the # RM-1129-135 will absolutely do the job that is intended. In regards to the fuel tank or...
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  • Will Anti-Sway Bar Fit 2016 Ram 1500 with Two-Wheel Drive
    We do have suspension enhancements that will be a great option for your 2016 Ram 1500, but I checked with Roadmaster and the Rear Anti-Sway Bar # RM-1129-135 will only fit four-wheel drive models. What I recommend instead is the SumoSprings Solo Custom Helper Springs - Rear Axle # SSR-307-40 which will fit your '16 Ram 1500 2WD and help reduce the amount of body roll because the work independently by compressing when making a sharp turn, for example. The SumoSprings are also extremely...
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  • Will the Roadmaster Rear Anti-Sway Bar Help Reduce Sway on a 2012 Ram 1500
    Yes, the Roadmaster Rear Anti-Sway Bar # RM-1129-135 that you referenced will help reduce sway and help stabilize the vehicle, especially with the other suspension components that you are also upgrading. However, a properly loaded trailer is the best defense against trailer sway. You will want to make sure you have as much weight as far forward on the trailer as possible. Another option you have to fight sway is a weight distribution system. Weight distribution systems do what their...
    view full answer...
  • Does the Roadmaster Sway Bar # RM-1129-135 Require Drilling to Install
    The Roadmaster Rear Anti-Sway Bar for Pickup Trucks # RM-1129-135 that you referenced utilizes factory installation points and does not require any drilling to install, I checked with Roadmaster to confirm this.
    view full answer...

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Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Dustin K
Video Edited:
Dustin K
Employee Wilson B
Updated by:
Wilson B
Employee Isabelle B
Updated by:
Isabelle B
Employee Sabrina W
Updated by:
Sabrina W
Employee Jonathan Y
Video by:
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Employee David F
Installed by:
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Employee Andy C
Installed by:
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