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  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

Retail:$915.16
Our Price: $530.73
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 to the frame to balance weight transfer and reduce body roll. 1-800-940-8924 to order Roadmaster anti-sway bars part number RM-1139-117 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.
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  • Reviews (1928)
  • Q & A (0)
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Roadmaster Anti-Sway Bars

  • Anti-Sway Bar
  • Rear
  • Roadmaster
  • 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
  • Works with front anti-sway bar (sold separately) for absolute stability - available on certain applications only
  • Made in the 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.



1139-117 Road Master Anti-Sway Bar - Rear

Item # RM-1139-117

Installation Details RM-1139-117 Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Roadmaster Rear Anti-Sway Bar - 1-1/2" Diameter - RM-1139-117

Average Customer Rating:  4.8 out of 5 stars   (1928 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:

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.

Neal

2/10/2024

My wife and I took an extended trip from Minnesota to Seattle and then back via Colorado last fall. We drove varied terrain in all types of weather. The improved ride and handling was significant. Driving was much less fatiguing and we felt much safer driving mountain roads and through prairie winds. You will not be disappointed.



by:

The antisway bar I purchased was relatively easy to install, and the service department was quick to respond to inquiries. It made a dramatic improvement in driving the motorhome, handling in wind, curves and semi truck winds was quite improved.



by:

This anti sway bar had an immediate improvement on handling since there was not a rear antisway bar from the factory.. This is on a 24 foot Minnie Winnie. Installation was straight forward.



by:

helped a lot ! also did front sway and sumo springs all around. unbelievable difference in handling in mountains, high winds and interstates 2015 Thor Vegas 24.1 class A



by:
2005 Ford Van

Looks like a winner. Not too difficult to install on a 2005 e350 without an original rear sway bar.



by:
2015 Ford E-Series Cutaway

I was skeptical, but after driving the RV the sway bar made a significant difference. The product greatly reduced body roll when going around curves and turning. It also took the oversteer out of the vehicle. It is a definite improvement over the factory OEM. Well pleased.

John

11/23/2023

I can’t believe how much better the RV handles, especially cornering.



by:
1988 Ford Van

--Etralier & Roadmaster Anti-Sway-Bar Review--

I
do not do product reviews--but am doing so here simply to express the AWESOME Customer Service, Articles, & Products at etrailer.com!

I have an old 1988 7.3 IDI (N/A Diesel) E350 transporter van (extended length with hightop) that I have spent a decade working on and just opted for front and rear Roadmaster anti-sway-bars.

I am so grateful I ordered them from etrailer! etrailer made the purchase process INCREDIBLE & the anti-sway-bars installed easily in an evening.

CUSTOMER SERVICE:

Via a private browser I inadvertently placed my order & received an error.

Hitting the "Live Chat" & within moments August from etrailer.com had answered saying my order was not in the system & it was safe to redo the order (which I did in a regular browser).

Just hours after placing the order (7 PM Pacific Time) I realized there was a third Roadmaster option (1 5/8" thick rear anti-sway-bar) I did not notice (see below for details of Roadmaster fit for the 1975-1991 Ford van, as I have worked out).

I again hit "Live Chat", at 7 PM!, & Matthew from etrailer within moments talked with a tech and confirmed I had (thankfully) ordered the correct part.

The next morning I awoke to an email from George at etrailer.com saying my order had been shipped and would arrive on Tuesday (~5 days across the U.S.).

The tracking link showed a map tracking the order as well who processed the order at etrailer.com (George), who gathered the order at etrailer.com (Cody), and who packaged (shipped) the order at etrailer.com (Michael)--with pics of the person.

The order arrived well packaged--from the factory I think--with only 2 cosmetic punctures (see pics if concerned--but for heavy (~36 lbs each) & awkward items across the U.S.--no complaints here).

Upon arrival, I received (what I assume is automated--but still) an email from Carol to follow up on the order.

Incredible!

ARTICLES:

Since then I have scanned some of etrailer.com's articles & they seem honest & insight-fully written (like the article discussing the cost/benefit, return on investment, of solar power*).

PRODUCTS:

There are also rather specialty products on etrailer I have wondered about but for lack of time have never researched (nor stumbled upon elsewhere). For example Kat's Heater Ether Start Fluid Injection System.**

Plus, from what I have gathered, they have product experts on-hand, with their names & pictures.

Do you know anywhere else with such customer service?!?!?

ROADMASTER ANTI-SWAY-BAR FIT
(for the 1975 - 1991 Ford Econoline van):

For fit, what I've worked out using the Roadmaster Fitmaster website*** is there are 5 variants for the 1975-1991 REAR anti-sway-bar & one item for the front (but do double check me!):

Part #1139-108 with a 1 3/8" anti-sway-bar: not for diesel
Part #1139-117 with a 1 1/2" anti-sway-bar: recommended for diesel E350 (what I contacted customer support over)
Part #1139-119 / RM83ZR with a 1 5/8" anti-sway-bar
Part #1139-108 with 1 3/8" anti-sway-bar: FOR auto-chain vehicles.
Part #1139-198 with a 1 1/2" anti-sway-bar: FOR auto-chain vehicle.

Part #1139-100 is 1 3/8" & is the only anti-sway-bar for the FRONT (I understand).

Unfortunately I have yet to test drive as I must tie several things down first & wanted to get this review out ASAP. But all reviews I have read say these anti-sway-bars are night and day difference.

SUMMARY:

In sum, there in no other company in the U.S, I have ordered from in over a decade that has done such a STELLAR job as etrader.com.

(And fixing/modernizing a 30 year old diesel van has required me ordering MASSIVE parts).

If etrailer is not one of the best companies in America, I do not know who is.

Order from etrailer with complete confidence.

THANK YOU so much etrailer!

Keep up the INCOMPREHENSIBLE job!

May you all be blessed,



by:
1982 Ford Van

I am so impressed with the Integrity of this company.
I so much appreciate the fact that, when I order something,
I get what I order and in a very professional
manner and time frame.
Thank you so very much for being a company that
respects the value of being a appreciative company!
The installation was a beeze!



by:
1993 Ford Van

This is an amazing anti sway bar. They shipped it fast and it arrived earlier then estimated. Was easy to install. All you need is included.



by:

We purchased item no. RM-1139-117 for our 1986 class c rv. It made a world of difference in the way it handles. Our son who is a mechanic at Peterbilt Manitoba did the install.



by:

It took an hour to install, perfect fit. For the E350 Super Duty Van on a 6" lift the install helped out on the swaying. Upgraded the front as well. Worth the investment.



by:

Big difference in the my RV handles! Very happy with product!!



by:

I added the roadmaster rear and front anti-sway bars and front steering stabilizer to my 2016 coachman class C rv. It made a world of difference. They took out 90% (estimated) sway from wind and from trucks. It feels so much safer to drive. I would highly recommend this modification for any rv.



by:

Great service and fast delivery. Installed on our 2017 Class C RV and made a world of difference on our cross country trip. Hardly notice any sway at all when driving or passing trucks, not even during strong wind gusts. Had it professionally installed by a local mechanic. Highly recommended doing the upgrade. May be overkill but this was done along with the front sway bar, upgraded steering stabilizer and sumo springs at all 4 wheels. Important for my peace of mind doing some long distance highway driving.



by:

My 89 E-350 didn't have any sway bar one the rear, I didn,t know if it would be worth the investment or not.. The unit drives so much better, it's great..

Roger C.

5/14/2021

World of Difference, Not nearly as tired after driving



by:

Awesome! Our E-350 camper van drove like a boat. The anti-sway bars made all the difference in the world. No more white knuckle grip on the steering wheel. Now I'm cruising down the freeway with a cup of coffee in one hand. Thanks etrailer!



by:

Big difference excellent quality and easy install. Did job right on ground in driveway. Really drives nice and solid now recover on bumps are recovered in one bounce instead of 5 to 6 bounces . I did front and back .Also added the rescue roadmaster reflex steering stabilizer what a difference . Install on 2018 winnabego Minnie Winnie .



by:

I love etrailer sales representatives and products. I have an RV and have equipped my vehicles with trailer hitches for various purposes. etrailer staff and representatives are always helpful. Additionally one big feature I see on etrailer site is their installation videos and video product reviews. These are extremely helpful to me since I do may own installations. One minor comment. When you do your videos include both sides of the vehicle especially if one side is more difficult then the other. I realize some times you video the easy side because of camera set up. Even so you installation videos are definite a great help.



by:

Installed this on my '96 Coachmen class C. The installation was straightforward; because I was replacing an OEM sway bar, some of the included brackets were not required. The only challenge with the installation was the weight of this bar - so it would be an easier install job if you have a helper. The RV drives well and with less body sway - which is what I was looking for.



by:
2013 Coachmen Freelander Motorhome

Needed to take some of the sway out of my class C motorhome. Ordered and received from eTrailer quickly, very well packaged. The sway bar is significantly heavier than stock. Installed in about 3 hours and it made a very noticable improvement in my motorhome handling. If I installed it again, I could probably do in about 1 1/2 hours.



by:
Thor

I installed your sway bars on a Thor Axis motor home. It really solved the tendency of my RV to rock out of control on rough roads and/or windy days. I was able to install myself and instructions were excellent.



by:
2018 Thor Chateau Motorhome

This rear anti-sway bar was installed in the 2018 E350 Thor Chateau U23 without any issue and without the need to drill the hole for upper vertical-run link. Have not done the test drive run yet to see the effect.



by:

Looks good...delivery was uneventful. I haven't installed the stabilizer but it looks pretty rugged and will do fine. etrailer customer service was awesome. Tracking was accurate and on time. Highly recommend.



by:
2021 Suzuki Swift

Great product and a perfect fit. This makes a huge difference in handling on my Thor Chateau Class C RV! Cornering and driving in crosswinds are the largest areas of improvement, plus a massive reduction in wind blasts when 18-wheelers pass at highway speeds. As always, a swift fulfillment and accurate fit thanks to eTrailer!



by:

I ordered anti-sway bars but not installed yet. Lori B helped me with my order. Very nice and very helpful. She wasn't sure of the time frame the order would be sent and received but I received my order two days after being ordered. That speaks well of etrailer and the staff at etrailer. I am very thankful for Lori B's help. I will order from etrailer again as needed.


25
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Show More Reviews

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

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    I recommend starting with the Roadmaster Rear Anti-Sway Bar, # RM-1139-147. This will reduce side-to-side movement for a noticeable improvement in your vehicle's stability and reduced body roll. For the front, I recommend the Timbren Front Suspension Enhancement System, # TFEF350. The Timbren Suspension Enhancement Systems are designed to work progressively, the hollow rubber springs are compressed along the folds as the weight increases. Once the folds are compacted, the stacked barrel...
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  • Rear Anti Sway Bar For 2005 Pleasure Way Excel TD E350 Class C Motorhome
    I confirmed with RoadMaster, both the Roadmaster Rear Anti-Sway Bar # RM-1139-117 and the Roadmaster Rear Anti-Sway Bar # RM83ZR will fit and work on your 2005 Pleasure Way Excel TD E350 RV. The # RM83ZR is a more heavy duty variant you would use on larger and really unstable systems. Or in areas that you know will require an anti sway that is heavy duty. So unless you know you are going to be in a lot of situations that will need a heavier system. Like areas with heavy winds or sharp...
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  • Recommended Roadmaster Rear Anti-Sway Bar for 2015 Thor Axis Motorhome
    The Roadmaster Rear Anti-Sway Bar, # RM83ZR is not a confirmed fit for your 2015 Thor Axis Motorhome that is built on a Ford E-Series Chassis. You need the Roadmaster Rear Anti-Sway Bar, # RM-1139-117.
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  • Sway Bars that Fit 2021 Thor Vegas Class A Motorhome to Improve Handling
    Yes the same sway bar fits from a 2020 Thor Vegas Class A motorhome would work on the 2021 models like with the part # RM-1139-117 for the rear and part # RM-1139-176 for the front. These are going to do a great job improving the ride quality, handling, and stability of your motorhome.
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    The End Link Kit for Roadmaster Rear Anti-Sway Bar for Motorhomes # RM-590147-00 is designed to fit the kits # RM-1139-117 & # RM-1139-147 which are not confirmed to fit your 2011 Forest River Georgetown Motorhome. Instead, for your motorhome you'd want to use the Roadmaster Rear Anti-Sway Bar # RM-1139-149, in which you'd need the Replacement 12-5/8" Shackle for Roadmaster Anti-Sway Bar Kits # RM-B404 with the bushing # RM-205202-10 instead.
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  • How To Improve Stability on a 2021 Thor Freedom Elite 22HE
    If you're having sway/stability issues with your 2021 Thor Freedom Elite 22HE built on a Ford E-Series Cutaway Chassis then the best thing you can do is add a heavier duty rear-anti sway bar, the Roadmaster Rear Anti-Sway Bar part # RM-1139-117 which retains the factory rear anti-sway bar. If you want to take this one step further I recommend the SumoSprings Custom Helper Springs part # SSR-106-54-1 for rear and part # SSF-106-47 for the front. The combination of these components will make...
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  • Which Roadmaster Anti-Sway Bar to Upgrade OEM Unit on 2012 Ford F-350 Dually
    The 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.
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  • Recommended Front And Rear Sway Bars For A 2020 Thor Chateau 24F Class C Motorhome
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  • Is Drilling Required For Steering Stabilizer or Anti-Sway Bar on 2020 Thor Vegas 24.1
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    Image 1 for
  • Should Front or Rear SumoSprings be Added to 2015 Thor Motor Coach First
    When improving the ride for your 2015 Thor Motor Coach 24C on a Ford E-350 chassis the best thing to do would be to install all of them. The SumoSprings replace factory bump stops and the sway bar replaces your factory sway bar. If you had to choose just one I recommend installing the rear SumoSprings # SSR-130-54 as they will help with both the sway and the jounce as opposed to just sway with the sway bar. Next I would install the front SumoSprings # SSF-106-47 as it will help with the...
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  • Heavy Duty Front And Rear Anti Sway Bars For A Thor Chateau Motorhome
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  • Rear Anti-Sway Bar For Ford E-350 Super Duty With V8 Or V10 Engine
    Glad you came here to find some answers, I have a part that will fit your E-350: **Roadmaster Rear Anti-Sway Bar # RM-1139-117. First thing I'll tell you the TigerTrak is not a confirmed fit for a 2008 E-350 van. However, the Roadmaster Rear Anti-Sway Bar is. This unit is constructed with thick 4140 chromoly steel for superior strength and includes heavy-gauge mounting hardware, easy-to-follow instructions and bushing lubricant. It is made in the U.S.A. and has a lifetime warranty.
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  • Replacement Front and Rear Sway Bars for 2015 Thor Axis 25.1
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  • Recommended Rear Anti-Sway Bar for 2011 Ford E-350 Super Duty Van
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  • End Link Location for Install of Roadmaster Sway Bar # RM-1139-117
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  • Is Drilling required When Installing Item # RM-1139-117 On A 2017 E-Series Cutaway
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  • Looking For Rear Sway bar For A 1998 Ford E350
    Hello Leif, thanks for reaching out. We do offer a rear sway bar for your 2998 Ford E350. I recommend the Roadmaster Rear Anti-Sway Bar - 1-1/2" Diameter # RM-1139-117. Just note that this sway bar will not fit vehicles with auto chains. Vehicles with automatic chains will use # RM-1139-198 instead.
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  • Suspension Enhancement for Motorhome on 1989 Ford E-350 Chassis
    The Air Lift LoadLifter 5000 Ultimate Air Helper Springs # AL88138 is indeed the correct kit for your 1989 Ford E-350 chassis. The air springs will certainly help to level out the rear of the RV and stabilize the suspension for reduced sway but it's important to keep in mind that this and all other similar kits are designed to work with suspension systems that are in good working order. This simply means that while the springs will provide benefit you likely won't get the chassis up to...
    view full answer...


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Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee David F
Installed by:
David F
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
Video Edited:
Dustin K
Employee John S
Video Edited:
John S
Employee Shelly K
Updated by:
Shelly K
Employee Wilson B
Updated by:
Wilson B
Employee Isabelle B
Updated by:
Isabelle B
Employee Sabrina W
Updated by:
Sabrina W
Employee Ryan G
Test Fit:
Ryan G

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