Roadmaster Rear Anti-Sway Bar - 1-3/8" Diameter
(1882 reviews)
Price: $491.00
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Roadmaster Rear Anti-Sway Bar - 1-3/8" Diameter
Item # RM-1139-173
Retail:$537.14
Our Price: $491.00
You Save: $46.14
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- Reviews (1882)
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Roadmaster Anti-Sway Bars - RM-1139-173
- Anti-Sway Bar
- Rear
- Roadmaster
- 1-3/8 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: 1-3/8"
- Limited Lifetime Warranty
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.
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
Installation Details
This Product Fits The Following Vehicles
- 2008 - 2020 Ford F-250 Super Duty
- 2017 - 2020 Ford F-350 Super Duty
- 2008 - 2016 Ford F-350 Super Duty Dually
- 2008 - 2016 Ford F-350 Super Duty Single Rear Wheel
Customer Satisfaction Score:
94% were satisfied with this product
6% of customers were not satisfied
- Wrong item was ordered
- Arrived Damaged
- Too difficult to install
Customer Reviews
Roadmaster Rear Anti-Sway Bar - 1-3/8" Diameter - RM-1139-173
Average Customer Rating: 4.8 out of 5 stars (1882 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: John03/01/2024
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: Karl 06/02/2024
The bar seems to keep my truck a bit more level during curves with the truck camper on. Definitely a bit harsher ride empty though. Would do it again when I replace this truck.
by: RV traveler05/04/2021
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.
by: Bruce 09/19/2023
2013 Ford F-350 Super Duty
Best and easiest installation ever, great product and will be buying more product, thank you
by: Steven 04/24/2023
I absolutely love that you personalized every step of my order with the person that was doing that step. I will do business etrailer in the future. Thank you for bringing this personalisation back. The item arrived packaged very well. I have not had the time to put it on yet. I will update how it works at a later date.
by: Daniel 06/05/2023
2018 Ford F-350 Super Duty
Great Product! A must have when hauling a slide in truck camper.
by: Tom 08/24/2022
Roadmaster
Have driven many miles with factory installed Sway bar - was garbage. Installed Roadmaster Rear sway bar improving our ride 100% as we felt more secure rounding corners traveling thousands of miles with less fatigue! Too Alaska & back!
by: Joel06/12/2022
2012 Ford F-350 Super Duty
Excellent product which greatly improved control while loaded with the pickup camper. The challenge here was the shipping. An awkward part to ship which arrived with a destroyed box and missing the inner box of mounting hardware. Called etrailer and was told they would take care of it; then silence. I sent emails and left voice mails without a response until I called back on the main line and spoke to a different rep who let me know it was due to ship out that day. Excellent people who ultimately took care of me even though not their fault though I would recommend more communication to let me know they were taking care of the issue rather than let me guess for two weeks. Overall, etrailer has been excellent to work with and this was my third project with them. I will buy from them again. JB
by: Gary10/05/2022
Damn, that was quick delivering the parts. One box was ripped open as someone else mention but I'm grateful the hardware box didn't fall out. It's a tough product to deliver, guessing 60 pounds for the sway bar
by: Rayan10/31/2018
2015 Ford F-350 Super Duty
Installed this on my 2015 Ford F350 to help with truck camper sway. Super easy install for a Ford F350 if you already have the pencil thin stock sway bar. The Roadmaster model 1139-173 is the one you need since you can reuse your end links. The bar was packaged well. I was looking at the Hellwig Big wig first since it is cheaper and comes with new links. But it is extremely difficult to remove the existing link above the fuel tank. Also the Hellwig is a thinner bar. It came packaged very well and arrived only a few days after I purchased it on Etrailer. Overall very happy with the results. The truck corners well under load and sway is all but gone when fully loaded with the camper.
by: Brad04/30/2020
2016 Ford F-350 Super Duty
It was a straight forward installation. I went with Roadmaster over Hellwig because the stock end links could be used. When you put this bar next to the stock bar, the Roadmaster is enormous in comparison. Looking forward to my first trip towing the 5th wheel.
by: Charles 06/23/2023
2019 Ford F-250 Super Duty
Looks great and installs easily.
by: Seth 03/01/2023
Night and day difference with it instal led.
by: Jay K10/26/2020
Sway bar works great. Bi notice once our 32 ft camper was behind it. Much better handling.
by: Shane 09/17/2022
Stock is a weeny little thing compared to this monster. Easy to replace, makes a huge difference in the turns!
by: Randall 07/16/2021
Great product! It was shipped fast and was easy yo install!!
by: Marc 09/19/2021
by: Larry 03/03/2021
by: Jeff 08/04/2022
2020 Ford F-250 Super Duty
by: Rcihard02/21/2021
by: Larry M.03/03/2023
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: Neal02/09/2023
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: Terry04/02/2023
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: Carey04/14/2024
Solid-built sway bar. Helps stabilize in wind while driving. Using on 2016 Thor Vegas 25.3 RV, notorious for suspension and driving issues. Using front anti-sway bar as well with Safe-T-Plus steering stabilizer.
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See what our Experts say about this Roadmaster Anti-Sway Bars
- Sway Bar Recommendation for 2018 Ford F-250 without Sway BarsFor a rear sway bar that fits your 2018 Ford F-250 that does not have a current sway bar you'd want the Roadmaster part # RM-1139-173 and/or for the front you'd want the part # RM-1139-180.
view full answer... - How do the End Links From the Roadmaster Kit # RM-1139-173-00 Install on a 2015 Ford F-350Thank 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... - Which Roadmaster Anti-Sway Bar to Upgrade OEM Unit on 2012 Ford F-350 DuallyThe anti-sway bar you referenced, part # RM-1139-117 from Roadmaster, is intended for use on motor homes, but we do have an anti-sway bar for the 2012 Ford F350. For the F-350 pickup we offer a sway bar to replace the factory unit. This item is part # RM-1139-173. This requires the factory end links from the OEM sway bar for installation. If your F-350 does not have a factory sway bar you will need to purchase the end links from a Ford dealer. This part works with dually trucks.
view full answer... - RoadMaster Rear Anti-Sway Bar Diameter Difference From A Stock Rear Anti-Sway Bar The Roadmaster Rear Anti-Sway Bar Item # RM-1139-173 is 1-3/8" diameter in size while the stock anti-sway bar on the 2017 Ford F-350 Super Duty is around 1/2" thick. Since your 2017 Ford F-350 Super Duty is DRW you'll need the Roadmaster Rear Anti-Sway Bar Item # RM-1139-193 which has a diameter of 1-1/2".
view full answer... - Will the Roadmaster Rear Anti-Sway Bar Work with Airbags on a 2014 Ford F-250I am not familiar with Lift Master airbags but the Roadmaster Rear Anti-Sway Bar for Pickup Trucks part # RM-1139-173 which is a fit for your 2014 Ford F-250 is just a replacement rear anti-sway bar for the factory anti-sway bar so there should be no reason whatsoever that it interferes with the airbag kit. I also took a look at some of the airbag kits we sell for your F-250 (Air Lift /Firestone) and none of them would pose any problems for an upgraded rear anti-sway bar like the Roadmaster...
view full answer...
- Will Aftermarket Differential Cover Interfere with Roadmaster Rear Sway Bar I reached out to my contact at Roadmaster and he said that the aftermarket differential cover on your F-250 won't cause any issues with the Rear Anti-Sway Bar # RM-1139-173. He said they actually specifically design their sway bars so that they wouldn't interfere with even large aftermarket diff covers. I have attached a short video review and the written installation instructions that you can check out as well.
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... - Correct Rear Anti-Sway Bar for 2017 Ford F-350 Super Duty PickupThere 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... - Center to Center Eye Measurement of B355 Roadmaster Endlinks Included in Kit RM-590170-00The B355 endlinks that come with the End Link Kit for Roadmaster Rear Anti-Sway Bar for Pickup Trucks # RM-590170-00 have a center hole measurement of 14 inches, while the overall length is 15-1/2 inches. I've attached a diagram to illustrate. The Endlink Kit is designed to be used with Roadmaster Rear Anti-Sway Bar # RM-1139-173, which fits certain model year Ford Super Duty trucks.
view full answer...
- Which Roadmaster Rear Anti-Sway Bar and End Links for 2020 Ford F-350 Single Rear WheelThis is correct. For your 2020 Ford F-350 you will want to use the Roadmaster Rear Anti-Sway Bar # RM-1139-173 and End Link Kit for Roadmaster Rear Anti-Sway Bar for Pickup Trucks # RM-590170-00. These are the correct parts for your truck, but because there is not a rear anti-sway bar present you will likely need to drill holes to mount the end links, per my tech contact at Roadmaster. I've linked some review videos on these parts for you to check out, as well.
view full answer... - Recommended Anti-Sway Bars For A 2018 Ford F-350 XLTThe Roadmaster Front Anti-Sway Bar # RM-1139-176 isn't a fit for your 2018 Ford F-350 but Roadmaster does have a rear anti-sway bar that is confirmed to fit with part # RM-1139-173. If your factory bar is missing or the end links are in need of replacement then you'll want part # RM-1139-173-00 instead to get everything. If you want to replace your front anti-sway bar as well then you'll need part # RM-1139-180 as well. As far as installation goes, these are fairly easy installations...
view full answer... - Does Roadmaster Rear Sway Bar for 2020 Ford F-250 Fit Tremor Package ModelsThe Roadmaster rear sway bar part # RM-1139-173 fits all models of the 2020 Ford F-250 so it fits yours with the Tremor package as well.
view full answer... - Rear Anti-Sway Bar Fit for 2016 Ford F-350 Dual Rear WheelsThe 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... - Compatible Rear Anti-Sway Bar For A 2015 Ford F-350 SRW 4x4 Yes, the Roadmaster Rear Anti-Sway Bar and End Link Kit # RM-1139-173-00 would be the correct choice for your 2015 Ford F-350 since you don't already have a factory rear anti-sway bar in place. If you did have one in place you could just use the # RM-1139-173 since you wouldn't need the end link kit.
view full answer... - Is Everything I Need to Install the Roadmaster Rear Anti-Sway Bar # RM-1139-173 on 2017 Ford F-250The 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... - How To Improve The Suspension On Your 2017 Ford F-250In 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... - Sway Bars Compatible With Air Bags On a 2019 Ford F-250 Super DutyTo help prevent the sway you are experiencing on your 2019 Ford F-250 you will want to add a sway bar. The Roadmaster Rear Anti-Sway Bar # RM93VR is for trucks that have the forward leaf spring bump pads bolted on to the frame. If yours are Riveted then you will need the Roadmaster Rear Anti-Sway Bar # RM-1139-173. These will greatly reduce the sway you are getting with your F-250 as they are manufactured to exceed OEM specifications. And since they are controlling the sway it will allow...
view full answer... - Rear Sway Bar for 2018 Ford F-350 without OEM Sway BarWe have just what you need. If your 2018 Ford F-350 is a non-dually the sway bar you would need is the part # RM-1139-173 and you'd also need the end link kit # RM-590170-00 since you do not have a factory sway bar.
view full answer... - Can RoadActive Suspension and Anti-Sway Bar Both be Used on 2017 Ford F-250You can certainly add both of these to your 2017 Ford F-250. The RoadActive Suspension Custom Leaf Spring Enhancement Kit # RAS3611-SLHD and Roadmaster Rear Anti-Sway Bar # RM-1139-173 would work well together. The Sway bar is going to help minimize side-to-side movement and helps balance weight transfer. It is especially helpful for top heavy loads and keeping your vehicle in line. The RAS kit will support and strengthen your leaf springs for an improved ride quality. These will also...
view full answer... - Rear Sway Bar that Fits 2022 Ford F350For your 2022 Ford F-350 we have the part # RM93VR as a confirmed fit which would work great.
view full answer... - End Link Kit For Installing Roadmaster # RM-1139-173 Anti-Sway Bar on 2015 Ford F-350 I have confirmed with my contact in the Tech. Services department at Roadmaster that you will need the # RM-590170-00 end link kit. You can order the kit and see current pricing by clicking the provided link.
view full answer... - Recommended Rear Anti-Sway Bar For A 2018 Ford F-250 Super Duty For your 2018 Ford F-250 Roadmaster recommends the # Roadmaster Rear Anti-Sway Bar # RM-1139-173, which would just reuse the factory end links. The # RM-1139-173-00 comes with new end links for models that have other suspension enhancements that could cause clearance issues with the sway bar. Either way you'll be getting the correct anti-sway bar, the end links are more of a case by case situation. I've attached a short video below where Dave will explain the difference in greater detail...
view full answer... - Rear Sway Bar Recommendation for a 2008 Ford F350 DuallyThe Roadmaster Rear Anti-Sway Bar # RM-1139-173 that you referenced will work on your 2008 Ford F-350 with dual rear wheels as Roadmaster has confirmed that it will work. This product installs utilizing the same installation hardware as the factory sway bar so it should not interfere with aftermarket exhaust as long as it is designed to be used with the factory sway bar. But since this product has not been tested with aftermarket exhaust I can not say for sure yes or no.
view full answer... - How do I Prevent Sway in my 2011 Ford F-350 with an In-Bed CamperTo correct your sway issue I highly recommend starting with a Roadmaster Rear Anti-Sway Bar part # RM-1139-173 and Roadmaster Front Anti-Sway Bar part # RM-1139-180 this solid 1 1/2" 4140 Chromoly sway bars are far superior to the current ones installed. The stiffer and thicker material will be much better suited to the forces put on it with the in bed camper. The second upgrade I recommend is the SumoSprings Solo Custom Helper Springs part # SSR-114-47 These will help to take a lot of...
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Do you have a question about this Anti-Sway Bar?
Info for this part was:
Written by:
Lindsey S
Installed by:
Jeff D
Installed by:
David F
Expert Research:
Jameson C
Expert Research:
Victoria B
Video Edited:
Dustin K
Video Edited:
John S
Updated by:
Wilson B
Updated by:
Isabelle B
Updated by:
Sabrina W
Video by:
Jonathan Y
Test Fit:
Clayton O
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Rv T.
10/16/2022
Still amazed at how well this anti sway bar improves the handling of my 2016 F350 DRW both while towing and unladen.