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

Roadmaster Rear Anti-Sway Bar - 1-1/2" Diameter

Item # RM-1209-115
Our Price: $903.59
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.

Shipping Weight: 65 lbs
Add to cart
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

Videos

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. 1-800-940-8924 to order Roadmaster anti-sway bars part number RM-1209-115 or order online at etrailer.com. Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Roadmaster Rear Anti-Sway Bar - 1-1/2" Diameter. Anti-Sway Bars reviews from real customers.
  • All Info
  • Reviews (1852)
  • Q & A (0)
  • Photos

Roadmaster Anti-Sway Bars - RM-1209-115

  • Anti-Sway Bar
  • Roadmaster
  • Rear
  • 1-1/2 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 USA


Specs:

  • Bar diameter: 1-1/2"
  • 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.



1209-115 Road Master Anti-Sway Bar - Rear

Installation Details RM-1209-115 Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Roadmaster Rear Anti-Sway Bar - 1-1/2" Diameter - RM-1209-115

Average Customer Rating:  4.8 out of 5 stars   (1848 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:

After reading all the information regarding fitment for my 2001 Freightliner Chassis I purchased this rear anti sway bar kit which had a side note stating that if your chassis had different u bolts, which my chassis does I could contact Roadmaster engineering direct for the correct parts. I did contact them directly and they referred me to e trailer, who referred me to Roadmaster, pass the buck game. So after a year I have a half installed anti sway bar kit that is useless and unreturnable because it was half installed waiting for answers that never came. A waste of my time and hard-earned money NOT HAPPY.



by:

The Rear Anti-Sway Bar made a world of difference! It made driving our coach much more enjoyable, and less stressful! I highly recommend it!



by:



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:

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:

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:

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



by:

Replaced the anti-sway bar on our 2019 F350. No special tools or jacks needed for the installation. Now our Lance 850 truck camper doesn’t sway nearly as much as before. Big improvement. Very pleased!



by:

The last thing to upgrade my front suspension on my 2018 Winnebago Aspect 27k. Money well spent! Easy installation, the ride greatly improved. Etrailer shipped this fast and I'm very pleased. Thanks.



by:

Major driving experience I upgrades my 2020 Thor Motor Coach KW-29 with front & rear sway bar, front steering stabilizer shock, All 4 front/rear Koni shocks, & Rear End stabilizer to chassis all together best investment on my RV improvement handling, body sway when 18 wheeler passing u up minimizing body sway from minor to none at all, reduce fatigue while driving course correcting steering reducing stress. Each component was felt the improvement but all together it’s been major improvement & experience



by:

Free from the roller-coaster ride my 2022 thor motorhome had with the factory bars.I have questions about why these companies don't install the suspension while building the rv.



by:

E trailer is.my go to place for anything towing trailering etc Absolutely the best products as well and the best service and the best people!!!!



by:

I installed both front and rear Road Master anti sway bars on our last RV and they made a tremendous improvement in handling. It was easy for me to install by myself in my driveway on out Coachman Leprechaun 319MB. I highly recommend this product.



by:

This is on a 2004 Dodge 2500 with a 2500 lbs truck camper, Dirt bike on a hitch rack, and 2 mountain bikes on a front rack. The sway bar definitely helps. This one fit well around my stupid 5" exhaust that was installed by the previous owner. The Hellwig would not clear it. I have the Timbren SES and wedges in my leaf springs as well. The sway bar is a nice addition to those items. What I really notice is that when making emergency maneuvers or going off road, the truck corrects quicker than before and feels safer and less likely to tip over. I would not say the bar by itself will solve all of your issues, but couples with other remedies, it will help make your top heavy overloaded ride feel safer. With all my additions, I can confidently go the speed limit and often times well above through the Colorado mountains with no issues.



by:

On my 2021 Mercedes Benz class C Tiffin Wayfarer this rear anti-sway bar fit perfect. I didn’t have to make any modifications to the exhaust. With help I had it installed in 2 hours and 50 minutes. The pictures on the instructions could have been clearer to understand.



by:

Item shipped quickly and the installation was fairly easy in my opinion. Have not been able to drive the RV yet but I'm sure this upgrade will improve the handling.



by:

The antisway bar was a great investment. Between Etrailer'S videos and the packaged instructions, the installation was straight forward. Great product.



by:

I installed a front and rear sway bar and they solved the problem. Before that I had a serious problem with cross winds and semis passing. No more white knuckles!



by:

Front Sway bar by Roadmaster: Great. BUT the provided new bushing that fits in the factory bracket is too thick and needs to be trimmed to fit right. BOTH of these issues SHOULD NOT have to be tolerated by a buyer of what is supposed to be an expensive quality product!!! The staff is superb but they asked me for a PRODUCT review and both brands are not impressive on the hardware.



by:

Significant difference when making turns and going around curves. These twin I beam suspension have a tendency to follow uneven road surfaces, this pretty much eliminated a lot of that. Installed it myself with the Roadmaster end links and the only complaint I have is I had to enlarge bolt hole for the end link bolt, other than that, well satisfied. I also installed the rear sway bar at same time, highly recommend replacing the front and rear sway bars together.



by:

As most p30 owners, handling has been an issue. I have had my 1990 motorhome for 24 years and have white knuckled it for most of the time. I have added a trac bar, new rear springs, air bags on the rear. All have had some improvement. I was hesitant about the cost/effectiveness of a new front sway bar. I am here to say that the larger sway bar made a big improvement in handling. I was very concerned about the cost. But glad I pulled the trigger. It handles quite flat and has had some improvement with sway.



by:

I purchased a Roadmaster antisway bar to replace the stock bar on my 2012 Pleasureway Excel Motorhome which is on a Ford E350 chassis. I did the install myself and instructions were very clear and was not too difficult to do. Handling is much improved, I have noticed less body roll when turning or going over bumps. I have included photos to show the difference between the stock bar diameter and the beefier Roadmaster bar.

etrailer shipped promptly and customer service was great.



by:

It is beyond my comprehension why camper and motor coach manufacturers build their products so subpar concerning how they handle on the road. I’m thankful that ETrailer for their expertise and products to get my Class C coach road ready, safer and more comfortable to drive.



by:

Very smart investment. In combination with the upgraded rear anti-sway bar the amount of steering inputs was greatly reduced. Definitely extended the miles I now drive per day.


25
1691
Show More Reviews

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

  • Recommended Rear Anti-Sway for 2003 Freightliner XC Chassis with Air Suspension
    Yes, the Roadmaster Rear Anti-Sway Bar, # RM-1209-115 is a confirmed fit for the 2003 Freightliner XC-Series including Air Suspension set-ups with 7/8 inch diameter U-bolts. This will make a vast improvement over the OEM sway bars due to the 4140 Chromoly, which is harder and stronger than the 1020 steel of the standard factory bar, and the upgraded anti-sway bar thickness with improved bushings.
    view full answer...
  • Suspension Enhancement Available For a 2001 Fleetwood Expedition 34N on Freightliner XCS Chassis
    The Roadmaster Rear Anti-Sway Bar # RM-1209-115 is currently the only suspension enhancement we have that will fit your 2001 Fleetwood Expedition 34N that is on a Freightliner XCS Chassis. You will need to confirm that your specific chassis uses air suspension with 3/4" U-Bolts on the rear axle.
    view full answer...
  • Recommended Anti-Sway Bars For A 2001 Freightliner XC-Series Chassis
    For a 2001 Frieghtliner XC-Series chassis the Roadmaster Rear Anti-Sway Bar # RM-1209-115 you referenced is the correct fit for the rear. As for the front, there is currently no confirmed fitting anti-sway bar or steering stabilizer. Most likely the mounting bracket for the sway bar has some sort of interference with the surround suspension components preventing it from fitting.
    view full answer...
  • Anti-Sway Bar Fit for 2003 Fleetwood Excursion on Freightliner XC Chassis
    Based on my research your 2003 Fleetwood Excursion is on a Freightliner XC chassis, and this is important because it's actually the chassis that determines the fit for things like stabilizers and anti-sway bars. With that in mind, there isn't a steering stabilizer that fits your motorhome, but there is an ever better option to improve your ride with an anti-sway bar. You will need to confirm that your 2003 Fleetwood Excursion has a Freightliner XC chassis with air suspension, and if so...
    view full answer...
  • Recommended Anti-Sway Bar for 2001 Fleetwood Bounder 39Z with Freightliner Chassis
    your 2001 Fleetwood Bounder 39Z is built on the Freightliner Chassis. There is only one sway bar we have that will fit your coach. It is the the Roadmaster Rear Anti-Sway Bar for Motorhomes # RM-1209-115. This rear anti-sway stabilizer with minimize sway and driver fatigue by improving the drivability of the coach. The bar mounts to the rear axle and the frame to reduce body roll and balance weight transfer.
    view full answer...
  • Comparing a Sway Bar, Anti-Sway Bar, and TruCenter Steering Stabilizer
    A sway bar (usually the name you know from passenger vehicles) is an anti-sway bar like those in the link I have provided. Anti-sway bars work to reduce side to side movement of the vehicle, giving you more control. They also work to reduce roll when cornering for a better ride. The weight of the load will be more balanced across the length of the axle. And the ride will be more level. The TruCenter from Blue Ox, see link, is a steering stabilizer. This device attaches to your vehicles...
    view full answer...
  • Anti-Sway Bar Recommendations For A 2000 Fleetwood Discovery Motorhome
    We don't currently have a compatible steering stabilizer or replacement front sway bar for your Freightliner XC chassis but we do carry the Roadmaster Rear Anti-Sway Bar # RM-1209-115, which is a confirmed fit if you have 7/8" diameter u-bolts. If you have 3/4" diameter u-bolts then you would need part # RM-1209-105 instead. Firestone doesn't have a fit listed for your chassis, but I've seen some forums where other owners of the same chassis have stated that they were able to cross reference...
    view full answer...
  • Rear Sway Bar Recommendation for 2002 Fleetwood Bounder 39Z on a Freightliner XC Chassis
    As long as your 2002 Fleetwood Bounder 39Z on a Freightliner XC Chassis has air suspension the correct rear sway bar is the part # RM-1209-115 that you referenced. Everything I was able to pull up on your RV is that is does come with air suspension.
    view full answer...
  • Is there a Minimum Ground Clearance Requirement for Using a TruCenter Steering Stabilizer
    The TruCenter steering stabilizers are meant to be mounted parallel with and behind the tie rod. It may be necessary to use shims between the tie rod bracket and the TruCenter unit to allow for clearance and to keep it from binding. You may not have to use shims either. Basically it should hang about as far down as the tie rod, maybe a bit lower since some of the TruCenter components are thicker than the tie rod. There isn't a minimum ground clearance required for the unit.
    view full answer...
    Image 1 for
  • Availability of Steering Stabilizer for 2002 Tiffin Phaeton
    Based on my research, it appears that your 2002 Tiffin Phaeton was built on a Freightliner XC-Series chassis with air suspension. I do recommend confirming this as it's possible that you have a different model. If this is correct, there is not a standard steering stabilizer available for this model, however we do have the Roadmaster Rear Anti-Sway Bar # RM-1209-115 that is a confirmed fit. This will do a great job of minimizing sway and driver fatigue by improving the stability of your...
    view full answer...
  • Replacement Sway Bar Bushing For A 2004 Fleetwood Revolution 40C Motorhome
    Based off of my research, your 2004 Fleetwood Revolution 40C was built on a Freightliner XC chassis, and would use the Roadmaster Rear Anti-Sway Bar # RM-1209-115. In that case, the replacement bushing you'll need is the Replacement Split Bushing for Roadmaster Anti-Sway Bars with 1-1/2" Diameter Bars # RM-205217-10.
    view full answer...
  • Recommended Rear Anti-Sway for 1999 Freightliner XC Chassis with Air Suspension
    At this time there is not a compatible steering stabilizer for your 1999 Freightliner XC Series chassis from any of our manufacturers. Roadmaster does have the Rear Anti-Sway bar # RM-1209-115 which will help with driving fatigue and sway by about 30 percent more than the factory anti-sway bar. This is due to the 4140 Chromoly which is harder and stronger than the 1020 steel of the standard factory bar. This is the best option currently available to help stabilize your XC chassis.
    view full answer...
  • Solution for Reducing Sway with 2001 Fleetwood Expedition 36 Motorhome
    Based on my research it does indeed look like your 2001 Fleetwood Expedition 36 is built on the Freightliner XCS chassis. To greatly reduce the sway you're experiencing (which isn't too uncommon) I highly recommend adding the Roadmaster Rear Anti-Sway Bar # RM-1209-115. This is confirmed to fit this chassis and it will do a great job of improving the stability and driveability of your RV to help put those white knuckle driving moments behind you. It will attach to the rear axle and chassis...
    view full answer...
  • Recommended Anti-Sway Bar For 2002 Tiffin Allegro Bus on Freightliner XC Chassis
    I do have a rear anti-sway bar option for you, but at this time we do not have any front sway bar or steering stabilizers for your 2002 Tiffin Allegro Bus on a Dec 2001 Freightliner XC Chassis. As long as your Freightliner XC Chassis has air suspension I recommend the Roadmaster Rear Anti-Sway Bar # RM-1209-115 which will increase the stability of your Bus by mounting to the rear axle and frame to prevent body roll, which will reduce the effort required to keep your vehicle going straight...
    view full answer...
  • Recommended Anti-Sway for 2001 Fleetwood Expedition Motorhome Freightliner XC Chassis
    For your 2001 Fleetwood Expedition motorhome, the Freightliner XC chassis does not have helper springs compatible from any of our manufacturers. The only assistance we have for stability is the Roadmaster Rear Anti-Sway Bar # RM-1209-115 if you have air suspension with 3/4 inch diameter U-bolts. This is the only ride enhancement we have that will fit on your motorhome and even then depends on your current suspension.
    view full answer...
  • Difference Between Friction Sway Bar and Weight Distribution System with Sway Control
    It sounds like you are deciding between a standalone anti-sway friction bar like the Reese # 83660 and a complete weight distribution system like the Reese Strait-Line # RP66084 that features integrated sway control for your Silverado and Keystone trailer. A friction sway bar will do a nice job of fighting sway once it has begun but a complete weight distribution system that uses tension bars for sway control will provide even more overall improvement, along with equalizing the load on...
    view full answer...
  • Is There A Steering Stabilizer for a 2004 Winnebago Journey on a Freightliner XC Chassis
    I do have a suspension enhancement option for a 2004 Winnebago Journey on a Freightliner XC Chassis but there isn't a steering stabilizer. There is however a rear anti-sway bar, the Roadmaster Rear Anti-Sway Bar part # RM-1209-115 which is one of the first and most felt improvements that can be made to a motorhome's suspension. It won't help to return the steering to center but it will help limit the amount of counter steering you'll be doing since it tightens the connection between the...
    view full answer...

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


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 Shelly K
Updated by:
Shelly K
Employee Matthew E
Updated by:
Matthew E
Employee Isabelle B
Updated by:
Isabelle B
Employee Sabrina W
Updated by:
Sabrina W
Employee David F
Installed by:
David F

At etrailer.com 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.