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

Roadmaster Rear Anti-Sway Bar and End Link Kit

Item # RM-1139-173-00
Our Price: $505.73
Anti-Sway Bars

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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 frame to balance weight transfer and reduce body roll. Includes end link kit. 1-800-496-5010 to order Roadmaster anti-sway bars part number RM-1139-173-00 or order online at Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Roadmaster Rear Anti-Sway Bar and End Link Kit. Anti-Sway Bars reviews from real customers.
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  • Reviews (1327)
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Roadmaster Anti-Sway Bars - RM-1139-173-00

  • Anti-Sway Bar
  • Roadmaster
  • Rear
  • Steel w Polyurethane Bushing
  • 1-3/8 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 frame to balance weight transfer and reduce body roll. Includes end link kit.


  • 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, end link kit, easy-to-follow instructions, and bushing lubricant


  • Bar diameter: 1-3/8"
  • 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.

1139-173 Road Master Anti-Sway Bar - Rear

590170-00 End Link Kit for Road Master 1139-173 Anti-Sway Bar - Rear

Installation Details RM-1139-173-00 Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Roadmaster Rear Anti-Sway Bar and End Link Kit - RM-1139-173-00

Average Customer Rating:  4.8 out of 5 stars   (1324 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 frame to balance weight transfer and reduce body roll. Includes end link kit.


The sway bars really helped keep the rear of the truck stable, eliminating most of the rear end sway. Much easier to keep it straight, especially in the wind and on uneven road surfaces. Very happy with this purchase.


The sway bar went in very well. No holes to drill. Bad part for me is your videos only show a replacement. I didn't have one to start with so it was a bit tricky getting a bolt and nut in place. The bump stops went in perfectly.
All in all i couldn't ask for more. I now have about 600 miles in with the Camper on the truck. Perfect set up.


I purchased the rear anti sway bar and end link kit because my 2017 Ford F350 single SRW did not come with a rear sway bar from the factory. The sway bar came with instructions and fits the truck well. The end link kit did not come with instructions, so I had to find an existing hole in each side of the frame to mount them to. Although there is a larger hole in the frame above the hole that I was mounting the end links through, there is not enough room to put a wrench on the nut inside the frame. So I welded the nut to a 1"x2"x3/16" steel plate. Then I was able to slip the nut/plate assembly into the frame and tighten the bolt. Additionally, there are no bolt torque specs, so I torqued the 1/2" bolts to 80 ft-lbs, and the 3/8" bolts to 60 ft-lbs. I have to hope that is sufficient. Of course, I shouldn't have to hope. That information should be included in instructions, and the nut/steel plate assemblies (or some other option) should be included in the end link kit. Although the finished product appears to be good quality, I gave it 3 stars due to the incomplete end link kit.

I will email you the instructions we have on this.
-- Etrailer Expert Sierra K - 01/18/2022

2015 Ford F-350 Super Duty

After months of waiting for supply chain issues to resolve I received my Sway Bar which is not abnormal these days and was pleasantly surprised that it was packaged quite well... The directions were sketchy though and the install took some time as I had to remove the DEF tank for access to the End link on driver side (not fun)....The Thing That Aggravated Me the Most was that the Sway Bar Eyelets were to small to allow the 1/2" bolt to fit... I wore out 2 drill bits reaming out the holes for both sides to get a proper fit... The company boasts AMERICAN MADE... Chinese I expect this... NOT US Made... WTH!?!

Ford F-250 Super Duty

Made a big difference just in daily driving. Yet to tow with it, but expect good results. Instructions not real helpful as they were for replacing a factory bar, which my truck (2017 Ford F-250 4x2) didn't have, also needed to bend a wrench to tighten the upper link connector, but all in all very satisfied.


I received the wrong kit, I needed RM-1139-173-00 and I was sent RM-1139-173. I'm missing all the internals parts because my Ford Truck F250 Super Duty never had a factory sway bar installed. Your customer service helped me in getting the right parts sent to me. etrailer has a Great customer service. Can't send any photos as of yet because I'm waiting for the rest of the parts to catch up from Roadmaster.


The product works great.


This is a heavy duty sway bar. Very good hardware and bushings.
Made a world of difference in control while pulling my 12k lb. Jayco Eagle
Always have very good luck with etrailer, delivered fast and quality parts...

A solid solution for handling and gives my truck a safer feel while pulling massive weight. Very much appreciate the quality of bushings and hardware this came with. It ended any handling problems I was having ...
Dan - 07/12/2020


Easy installation, looks and works great. Use on my 2015 F250 in conjunction with an Airlift 5000 auto leveling system and Demco hijacker auto slide 5th wheel hitch - using the under bed mount.

2016 Ford F-250 Super Duty

Put this on by's heavy and would recommend a extra set of hands. It comes with all hardware needed including the special grease for the bushing's.Could tell the difference even empty,does change ride quality some but nothing drastic,great product would buy again

2016 Ford F-350 Super Duty

Installs as intended replacing original F350 4x4 8'bed (2016), fit perfectly. Need to wait for my next truck camper load to see if it works fully loaded, but runs great empty! My truck has a 2" lift. Only difficulty was the 1 rusty nut for original removal behind the gas tank.

2011 Ford F-250 and F-350 Super Duty

Very easy to install and fixes the issue I was having with swaying.



Have not had time to install but looks to be very good quality.



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

  • Rear Anti-Sway Bar Fit for 2016 Ford F-350 Dual Rear Wheels
    The Roadmaster Rear Anti-Sway Bar 1136-173 is confirmed to fit your 2016 F-350 with dual rear wheels. If your truck does not currently have a factory sway bar you will want to order part # RM-1139-173-00 that comes with the end link kit. If your truck does have a factory sway bar, then you will just need to order the Roadmaster sway bar with part # RM-1139-173. I have linked an installation video of this anti-sway bar on a 2015 F-350 that had a factory sway bar for your to review.
    view full answer...
  • Is Everything I Need to Install the Roadmaster Rear Anti-Sway Bar # RM-1139-173 on 2017 Ford F-250
    The Roadmaster Rear Anti-Sway Bar # RM-1139-173 contains the polyurethane bushings and mounting hardware to install onto your 2017 Ford F-250. The only extra item you would need is the end link kit. The sway bar and end link kit is available in one package, the Roadmaster Rear Anti-Sway Bar and End Link Kit # RM-1139-173-00. This kit will be everything you need to install the rear anti-sway bar on your 2017 Ford F-250.
    view full answer...
  • Recommended Rear Anti-Sway Bar For A 2020 Ford F-250 Super Duty 4x4
    For your 2020 Ford F-250 Super Duty 4x4 I recommend the Roadmaster Rear Anti-Sway Bar # RM-1139-173 if you can reuse the current end links you have from the factory and save yourself some money. If you can't for whatever reason, maybe yours are damaged or you have some other kind of suspension enhancement giving you clearance issues, then you'll need the # RM-1139-173-00, which is the same sway bar but in a kit with the end links. I've attached a video where Dave runs through the installation...
    view full answer...
  • How do the End Links From the Roadmaster Kit # RM-1139-173-00 Install on a 2015 Ford F-350
    Thank you for the questions about the Roadmaster Rear Anti-Sway Bar and End Link Kit # RM-1139-173-00 for your 2015 Ford F-350 Super Duty. I spoke with my contact at Roadmaster who wasn't sure why they don't have specific instructions for the end link kit but he did say that you just connect the links to the sway bar and then lift them up to holes in the frame which allow them to hang straight down. This kit is comprised of 2 different kits; the sway bar kit # RM-1139-173 and the End...
    view full answer...
  • Correct Rear Anti-Sway Bar for 2017 Ford F-350 Super Duty Pickup
    There are a few different options for your 2017 Ford F-350 Super Duty (crew cab, long bed, diesel) depending on the application. I'll list them below: Part # RM-1139-173 - 1-3/8 diameter factory replacement - Designed for single rear wheel pickups (all models). Part # RM-1139-173-00 - Designed for single rear wheel pickups (all models) where no factory rear bar is present. Part # RM-1139-193 - Designed for dual rear wheel pickups (all models).
    view full answer...
  • Will Roadmaster Sway Bar part # RM-1139-173-00 Work in Conjunction with Air Bag System
    Yes, the Roadmaster Sway Bar part # RM-1139-173-00 would work just fine on a vehicle that has Firestone air bags installed.
    view full answer...
  • Is a Rear Sway Bar Required for Truck Bed Campers on a 2017 Ford F-250
    Though not required, you will certainly reap some benefits from installing an upgraded rear sway bar like the Roadmaster Rear Anti-Sway Bar and End Link Kit part # RM-1139-173-00 on the rear of your 2017 Ford F-250. The Timbren springs you already have installed will do a good job of supporting the added weight but will not really do much for sway control. The added weight of the truck bed camper will affect your truck's ability to corner safety and installing the upgraded rear sway bar...
    view full answer...
  • Is Drilling Required To Install the Roadmaster Rear Anti-Sway Bar On a 2015 Ford F-250
    The Roadmaster Rear Anti-Sway Bar and End Link Kit part # RM-1139-173-00 is a custom fit for your 2015 Ford F-250 which means there is no drilling required. I checked with Roadmaster to confirm this for you. There are brackets welded to the axle for the sway bar to attach and then pre-drilled hole in the frame for the end links to attach. The review that you were referencing was not on the same Roadmaster Rear Anti-Sway Bar and End Link Kit listed above but rather one similar in which...
    view full answer...
  • Replacement Front and Rear Sway Bar Recommendations for a 2014 Ford F-350 for Towing
    Going with a heavier sway bar on the front and rear of your 2014 Ford F-350 will help improve handling and stability when towing your fifth wheel trailer. For the rear you would want the part # RM-1139-173-00, for the front you would want the part # RM-1139-180.
    view full answer...
  • Sway Bar Recommendation for 2011 Ford F-250 with Slide In Camper that is Swaying
    Yes, the TorkLift StableLoad Rear Suspension Upgrade with Quick-Disconnects # TLA7310 is perfectly compatible with the SuperSprings kit you have installed on your 2011 Ford F-250. Since you are complaining about sway I'd actually recommend a thicker rear sway bar like the part # RM-1139-173-00 which is a confirmed fit for your truck and would make the biggest improvement in reducing sway.
    view full answer...
  • Will SuperSprings and Rear Anti-Sway Bar Work Well Together On a 2014 Ford F-350
    The SuperSprings Custom Suspension Stabilizer Kit part # SSA22 is a great option for a 2014 Ford F-350. It will do a great job of helping to providing extra support when towing or hauling. It can then be used with the Roadmaster Rear Anti-Sway Bar and End Link Kit part # RM-1139-173-00 no problem. The combination of the two should not be an issue as they really are designed for different purposes, weight distribution and sway respectively.
    view full answer...
  • How To Improve The Suspension On Your 2017 Ford F-250
    In order to gain the most stability and support for your 2017 Ford F250, you will want to install both support and sway control components. The most economical way to add support to your truck is by using the Timbren Suspension Enhancement System part # TFR250SDJ. The Timbren springs are a good way to add additional support to your vehicle while towing or hauling a heavy load however, the best way to add support to your truck would involve installing air bags such as the Firestone Ride-Rite...
    view full answer...
  • Can a Rear Sway Bar be Installed with Firestone Air Bags?
    There will be no issues at all installing a rear sway bar and air bag kit on your 2015 Ford F-250. As examples, the Firestone # F2597 will install in a different location than the Roadmaster # RM-1139-173-00. I included install videos of both of these products that show this as well. I do need to say that the # RM-1139-173-00 is specifically designed for vehicles that do not have a factory sway bar though. If you do currently have a factory one and are replacing it, you will need the #...
    view full answer...
  • Recommended Solution For Body Roll on 2018 Ford F-150 with Air Bags Already Installed Towing 5W
    Typically the air bags should be doing a decent job of helping with stability but sometimes it's just not enough with certain trailers in windy conditions. We do not carry vehicle/truck sway bars but you could add something like the RoadActive Suspension # RAS3611-YHD. You'll need to make sure, on your truck, that there is at least 3-1/4 inches between the u-bolts for spring stack and the air bag kit you have. If there is then you have room to install the RAS kit and it would definitely...
    view full answer...
  • Will Using a Rear Anti-Sway Bar at the Rear of Truck Prevent Trailer Sway
    Installing an anti-sway bar at the rear of your truck may help control some of the trailer sway, but will not prevent trailer sway from happening. Installing a sway bar helps reduce the body roll and sway you will see on the tow vehicle, but does very little in preventing the trailer from swaying. Installing a weight distribution hitch with sway control will be the best option for preventing trailer sway. A weight distribution system will transfer the load pushing down on your rear axles...
    view full answer...

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Info for this part was:

Employee Lindsey S
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Employee Wilson B
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Employee Isabelle B
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Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
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Written by:
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Employee Dustin K
Video Edited:
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