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

Roadmaster Rear Anti-Sway Bar

Item # RM-1129-135
Our Price: $339.93
You Save: $67.98
Anti-Sway Bars

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

This item qualifies for Free Shipping
Shipping Weight: 28 lbs
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos


Need help with installation?
Locate installers near me
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. 1-800-496-5010 to order Roadmaster anti-sway bars part number RM-1129-135 or order online at Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Roadmaster Rear Anti-Sway Bar. Anti-Sway Bars reviews from real customers.
  • All Info
  • Reviews (1327)
  • Q & A (0)
  • Photos
  • Why etrailer?

Roadmaster Anti-Sway Bars - RM-1129-135

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

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.


  • 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


  • 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 - RM-1129-135

Average Customer Rating:  4.8 out of 5 stars   (1327 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.

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.


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.


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

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


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

2016 Ram 2500

Great customer service. Part fit perfect. Great communication


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.


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


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


Quick easy bolt on, major improvement


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

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


Jason - 07/01/2022


2011 Ram 1500


Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars

The Roadmaster Anti-Sway Bar is of excellent quality. All of the parts are heavy duty and fit exactly the way they should. I have a 2003 Fleetwood on a Workhorse W22 chassis and considering the age all of the factory bolts and nuts came off without any issues. Installation was easy following the printed instructions and the online video. I really recommend this product.


Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars

Very nice High Quality Anti-Sway Bar!
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.


Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars

Very straightforward installation and all the parts were of high quality. This is a substantial, solid sway bar. My RV feels a lot more solid on the road in curves etc. Very satisfied with the product.


Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars

I installed the front and rear Anti-sway bars with the steering shock.
I am 100% satisfied with the outcome and handling of my RV while driving down the road.
I would highly recommend the installation of these items on any RV

You just cant go wrong installing these kits to you RV. Next thing i looking to install is the air suspension kit and new shocks.
marcus - 09/21/2021


Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars

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!!


Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars

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


Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars

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 .

Sway bar has held up well since installation.
Michael - 06/07/2022


Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars

I recently purchased a 2011 Itasca Cambria 28 with only 10,500 miles. Our first trip made it clear that I needed to stiffen the chassis. Unfortunately Roadmaster Anti-sway bars are backordered, and though you should put those on first, I just installed the Steering Dampener. Easy installation though you need to be careful about seating the bushings. The videos are much better than the printed instructions. Already see a big difference in how much tighter the steering is. Can't wait for the bars to arrive. Disappointed to have to wait 4 weeks.

One year later, we have put over 22,000 miles on our rig, and added new tires. The ride is so amazingly better than without the steering stabilizer, and especially the anti sway bars. These additions are absolutely worth the time and money. I would strongly recommend them. You won’t regret it.
Jose - 12/13/2021


Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars

This is one of the best upgrades I have made to my 2016 F350 dually. The vehicle handles noticeable better while towing as well as without a load. I bought this stabilizer to help with body roll when cornering while towing my 19,000 lb 5th wheel. But I was surprised how well handling improved with an empty truck while driving down winding country roads. My truck now corners better than my wife’s Ford Escape (not exaggerating this). I state this a year after making this upgrade. If and when I buy a new truck, this will be one of the first upgrades I will make.

Still amazed at how well this anti sway bar improves the handling of my 2016 F350 DRW both while towing and unladen.
RV t - 10/16/2022


Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars

Relatively easy installation on my 2004 Ram 3500. It would have been easier if I had removed the spare tire. I only noted a few minor issues. The instructions say to mount the U brackets to the rear two holes in the shock mounts. However, on this truck the shocks mount one in front and one in rear. Therefore, the passenger side mounts in the rear two holes, but the driver side mounts in the front two holes. Otherwise all went well.

Dale C - 12/18/2021

Show More Reviews

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

  • 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...
  • 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...
    view full answer...
  • 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...
  • 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.
    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...
  • 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...
  • 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...
    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...
  • 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...
    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.
    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...
  • 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...
    view full answer...
  • 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...

Do you have a question about this Anti-Sway Bar?

  • Why

    At we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate anti-sway bar information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

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 Jonathan Y
Video by:
Jonathan Y
Employee David F
Installed by:
David F

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

Product Experts Available Now!
Call 1-800-496-5010