Roadmaster Rear Anti-Sway Bar - 1-1/2" Diameter
(1857 reviews)
Price: $777.76
In Stock
Roadmaster Rear Anti-Sway Bar - 1-1/2" Diameter
Item # RM-1139-145
Our Price: $777.76
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- Reviews (1857)
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Roadmaster Anti-Sway Bars - RM-1139-145
- 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 the USA
Specs:
- Bar diameter: 1-1/2"
- 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.
1139-145 Road Master Anti-Sway Bar - Rear
Installation Details
This Product Fits The Following Vehicles
- 2018 - 2020 Thor ACE Motorhome Ford - 20,500 GVWR
- 2008 - 2010 Holiday Rambler Admiral Motorhome Ford - 20,500 GVWR
- 2018 - 2018 Jayco Alante Motorhome Ford - 20,500 GVWR
- 2007 - 2008 Tiffin Allegro Motorhome Ford - 20,500 GVWR
- 2008 - 2010 Holiday Rambler Arista Motorhome Ford - 20,500 GVWR
- 2007 - 2007 Coachmen Aurora Motorhome Ford - 20,500 GVWR
- 2012 - 2014 Newmar Bay Star Motorhome Ford - 20,500 GVWR
- 2012 - 2020 Newmar Bay Star Sport Motorhome Ford - 20,500 GVWR
- 2007 - 2008 Fleetwood Bounder Motorhome Ford - 20,500 GVWR
- 2007 - 2010 Newmar Canyon Star Motorhome Ford - 20,500 GVWR
- 2009 - 2009 Winnebago Chalet Motorhome Ford - 20,500 GVWR
- 2008 - 2009 Damon Challenger Motorhome Ford - 20,500 GVWR
- 2007 - 2010 Damon Daybreak Motorhome Ford - 20,500 GVWR
- 2006 - 2014 Ford F-350, 450, and 550 Cab and Chassis F-550 - Class A Motorhome with V10
- 2006 - 2019 Ford F-53 Ford - 20,500 GVWR
- 2015 - 2020 Ford F-550 Cab and Chassis Class A Motorhome with V10
- 2007 - 2008 Fleetwood Fiesta LX Motorhome Ford - 20,500 GVWR
- 2007 - 2008 Fleetwood Fiesta Motorhome Ford - 20,500 GVWR
- 2016 - 2020 Forest River FR3 Motorhome Ford - 20,500 GVWR
- 2019 - 2019 Forest River Georgetown 3 Series GT3 Motorhome Ford - 20,500 GVWR
- 2019 - 2019 Forest River Georgetown 5 Series GT5 Motorhome Ford - 20,500 GVWR
- 2017 - 2018 Forest River Georgetown GT5 Motorhome Ford - 20,500 GVWR
- 2008 - 2017 Forest River Georgetown Motorhome Ford - 20,500 GVWR
- 2011 - 2011 Forest River Georgetown VE Motorhome Ford - 20,500 GVWR
- 2008 - 2009 Four Winds Hurricane Motorhome Ford - 20,500 GVWR
- 2015 - 2020 Thor Hurricane Motorhome Ford - 20,500 GVWR
- 2008 - 2011 Gulf Stream Independence Motorhome Ford - 20,500 GVWR
- 2007 - 2020 Coachmen Mirada Motorhome Ford - 20,500 GVWR
- 2008 - 2014 Monaco Monarch Motorhome Ford - 20,500 GVWR
- 2018 - 2020 Jayco Precept Motorhome Ford - 20,500 GVWR See All Vehicle Fits
Customer Satisfaction Score:
86% were satisfied with this product
14% of customers were not satisfied
- Wrong item was ordered
- Product did not meet expectations
- etrailer mistake
Customer Reviews
Roadmaster Rear Anti-Sway Bar - 1-1/2" Diameter - RM-1139-145
Average Customer Rating: 4.8 out of 5 stars (1857 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: Kevin 08/04/2022
The install went very well. The videos really helped, The improvement was very noticeable. I bought the front one can't wait to take her for a spin.
by: John10/07/2023
Great product. Fairly easy to install. Instant results in the driving quality of the coach.
by: SteveD04/16/2021
I think the anti-sway bar is the most noticeable. When I'm turning out of my driveway where there is a dip as I go over the curb-cut, for example, the sway seems limited moreso than before. As for the steering stabilizer, I think the RV seems a little harder to turn at a slow speed, but I don't notice a lot of difference in it's "springing back to straight" as I'm going down the highway. Some of that may be due to the crown of the road. I'm anxious to try it on the interstate to see if it is better there.
Well, I drove on a smooth, level Interstate with a tailwind, and it handled like a dream.
Bottom line, the biggest difference in driving is the wind and the road surface. These components probably help a little, but I'm not sure it was worth the cost. I'd like to think the RV handles a little better, but I'm not sure that isn't because I want it to after spending the $$$ for these upgrades.
by: Jared L.10/16/2017
2005 Pontiac G6
While not the transcendent experience some of the other users had, this did make a noticeable difference. My star rating represents a product doing exactly what it was supposed / advertised to do.
I was told the rear anti sway-bar would eliminate 65% of the movement. And that is an accurate description of the improvement. It was most noticeable on uneven roads and highway ramps. When the coach would have rolled 3-4 times, it's now 1 time. And, on long sustained curves the degree of roll is less.
I paid to have it installed. After looking at it installed, it would have been easy to do on my own.
I recommend the anti sway-bar for anyone looking to reduce body roll.
by: Greg09/03/2021
2008 Ford F-53
This part was absolutely the right pick. I researched a lot of anti-sway products and this one came out on top due to its simple installation (thanks to the etrailer video), price and support from etrailer. It went on just like the video showed, though I had to use an impact wrench for the chassis bolts, the etrailer guy who used a wrench must be a beast. Definitely a DIY project even for novice mechanics. I test drove it and it was hands down the biggest improvement in ride even though I had put on new shocks and have air bags. etrailer is my go-to for nearly everything I do to my RV.
by: Wayland09/01/2022
Delivery was fast and great.Paula S is a very excellent person to have working for your business She was very helpful in helping me out getting the right parts and fun to talk to. Thanks again for your help.
by: Rodney09/12/2016
2016 Ford F-53
I thank Cathy T great help she gave me.
I installed the front and back anti sway bars on my 2016 George Town Motorhome. It has the ford f-53 chassis and a Dana 150 rear end. I use road master RM-1139-145 on the rear and
RM-1139-140 on the front. Thanks to Cathy T she set me up with the right parts.
I don't have any more body roll and the 18 wheelers bearly push me over now. If not at all. I also have the road master reflex steering stabilizer Rm-BK9-RSSA.
by: Eldn Hodapp07/31/2013
I put both sway brs on today with help from my friend. They went just
as the paper work said, except for the front. You only replaced two of the bolts holding on the bushing brackets. We just reused two of them. Everything seemed to work great on our test drive. I just took
a picture of the front sway bar because the rock guard was in the way of a decent pic. Everthing went great.
by: Brent 07/16/2017
2008 Ford F-53
Winnebago vista. This was easy to install. The additional sway control in the rear is the most noticeable of the three improvements I did. They weren't the lowest price I could find. But they did have all three items. The shipping was quick. The installation videos were very helpful. I used my leveling jacks to assist in installing the frame brackets.
by: John S.06/24/2017
2013 Ford F-53
Very well constructed fit and finish are top of the line. I have not tried this yet because I need a 21mm crows foot wrench for my torque wrench(200 ft-lb) for the cross tube bolts.
I am hoping that it will minimize fishtailing from our tow car, as well as controlling sway.
by: Randy P12/06/2021
Once again e-Trailer exceeds our expectations! Their customer support is top notch! Kyle was very helpful with our order and followed up with an email to also advise us our delivery was made today along with helpful videos.
We can’t wait to get front & rear sway bars installed on our Class A Motorhome!
Randy P.
12/7/2022
Whow! What a great product! Makes driving our class a Motorhome so much more enjoyable,
by: Lance08/15/2023
Only thing that looked wrong was the package was taped pretty good, was it shipped that way.
by: Greg 04/13/2021
very happy with the product and with Etrailer. Anyone who owns one of these motorhomes realizes it's a step by step process to get it have decent ride characteristics, and adding sway bars and trac bars and steering stabilizers are all part of it in a step by step process. Every little bit helps!
Greg S.
4/13/2022
Its all good, its still like driving a saltine box down the road, but it has definite improvement over stock configuration of the f53
by: Shand07/30/2023
Made a tremendous difference in the rid e.
by: Don 09/22/2022
2006 Ford F-53
I live in the same town as the Road Master factory, so I stopped by to see what I needed for my 2006 HR motorhome.
Then I went home to order from E-Trailer to save almost $400 below the factory prices on the two sway bars. Yes I'm very happy with E-Trailer!
by: Luke 09/09/2022
Pontiac Trans Sport Van
If you are thinking of doing some distance comfortably with your motorhome, then sway bars are for you. No more stress when you experience side winds or passing transport trucks!
by: Frank 07/22/2023
2018 Forest River Georgetown GT5 Motorhome
Item was delivered early and very well packed
by: John01/11/2022
Well worth the money. I installed aftermarket front and rear ant-sway bars on my FR32. Great support from emailed as well in the selection process. They actually answer the phone and take the time to walk you through the process. The reason I am taking the time to write this review is directly because of their 1 year follow up email. Kudos etrailer!
by: James L05/20/2023
I had the pleasure of dealing with Daniel W.and I must say his customer service was very good and received my order a head of time.I must rate his service a 5 star and looking forward to my next purchase real soon. Thanks Daniel for your continued great customer service.
by: SgmJack C07/29/2017
I just spent several hours trying to install RM1139-145 only to find that I have again ordered the wrong item. Now I can not return the item this time because I do not have the original carton the item came in. The box went out with the trash before I got to start the install procedure.
Oh well, just several hundred dollars wasted.... We will just eat light and cancel a few camping trips for a couple months...
We will survive without the Anti-Sway Bars while the camper is parked in the driveway.
by: Terry 09/26/2018
Rear sway bar made a big difference in body lean and roll. Motorhome is much more stable.. I also added Sumo springs on all corners. I put sway bar on first and it made a big difference.
by: Terry K06/13/2017
Promptly shipped. Correct item. etrailer did good.
Road Master however packaged the parts for the sway bar poorly. In particular, they put a little cup of the grease for the bushings in a bag along with large bolts/nuts/washers without a lid. The grease got everywhere. This is not an etrailer issue obviously, but this is the 2nd time in 2 weeks I saw Road Master mess up on their packaging (the 1st time, the entire box with the sway bar mounting hardware was missing). Road Master needs to have better outgoing Quality Control.
by: Brian D.09/14/2017
Roadmaster
Installed the Roadmaster anti-sway bar on my 2017 Thor Miramar 34.1 today. The installation was relatively simple. What a difference! The pitching and leaning of my coach was dramatically improved. Money well spent!
by: W J 09/09/2018
This is in response to installing my anti-sway bar. While checking out the procedure for installing my Road Master anti-sway bar, I found out why I needed one, the original anti-sway bar "U" clamp was broken rendering the original sway bar useless. After repairing the original sway bar, myself and my neighbor which is a mechanic began installing the new anti-sway bar. First of all, you will definitely need an IMPACT WRENCH to remove the four bolts on the frame to install the mounting brackets. These bolts were put on with an impact wrench and put there to stay. After installing the mounting brackets everything else went smooth. Two people will be needed to install the large sway bar due to the weight of the bar. Now I have two sway bars, the original equipment and the Road Master. As far as how the equipment will work I will let you know as I will be leaving the 19th September for a month-long trip through AL, MS, LA, Texas, New Mexico, AZ, Okla, MO, AR, then back to FL.
by: Dave B11/24/2020
Sway bar did its job. This install was one part of an attempt to achieve "reasonably ride quality" on a Ford F53 chassis - class A motorhome. After spending about $4K, I came to the realization that it was not going to happen. I traded in that MH for a diesel pusher.
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view full answer... - Anti-Sway Bar Fits for a 2008 Motorhome with Ford F-53 ChassisThank you for the information! We have both front and rear anti-sway bars that fit a 2008 Ford F-53 chassis with the V10 engine size. The correct bar will vary depending on the GVWR of your motorhome: Front Anti-Sway Bar: Fits All Models - # RM-1139-148 Rear Anti-Sway Bar: 15.7K - 18K - # RM-1139-146 20.5K - # RM-1139-145 (only fits if shock mounts ate parallel to ground) 22K - 26K - # RM-1139-149 (may need extended longer U-Bolts - see installation notes section) Attached are some...
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view full answer... - Best Suspension Enhancements for a 2018 Ford F-53 ChassisFor your 2018 Forest River FR3 32DS on a Ford F-53 chassis, I recommend first adding a rear sway bar like the Roadmaster Rear Anti-Sway Bar for Motorhomes part # RM-1139-145. I would then recommend adding a steering stabilizer like the Roadmaster Reflex Steering Stabilizer with Mounting Brackets part # RM-RBK22-RSSA followed by a front sway bar like the Roadmaster Front Anti-Sway Bar for Motorhomes part # RM-1139-148. A rear sway bar will almost always be the first upgrade you want to...
view full answer... - Sway Bar Recommendation for RV Built on 2016 Ford F-53 ChassisTo improve the ride quality of an RV built on a Ford F-53 chassis like what you have the best solution is going with a better rear sway bar. So for that you'd want the part # RM-1139-145 which is a confirmed fit. Next a front sway bar would make the next best improvement with part # RM-1139-148.
view full answer... - Combining SafeTPlus with SumoSprings Suspension and Roadmaster AntiSway Bars on a 2020 Thor Ace 27.2You can most definitely use SumoSprings front and rear suspension springs along with Roadmaster front and rear anti-sway bars. This isn't overkill, it's just wanting complete control of your motorhome! Here are the part numbers for the springs and bars that are confirmed to fit your chassis: - SumoSprings Front Springs: # SSF-170-40-2 - SumoSprings Rear Springs: # SSR-187-40-1 - Roadmaster Front Bar: # RM-1139-148 - Roadmaster Rear Bar: # RM-1139-145 If, in the end, you decide to...
view full answer... - Suspension and Steering Enhancement For a 2016 Forest River Georgetown 335DS Of Ford F53 ChassisFrom what I can find your 2016 Forest River Georgetown 335DS sits on a Ford F53 20,500lb chassis. If this matches what you have the Front # SSF-170-40-2 and Rear # SSR-187-54-1 SumoSprings are the correct ones for your motorhome. We also have the Roadmaster Front # RM-1139-148 Rear Sway Bar # RM-1139-145 and Steering Stabilizer # RM33RR you can use to make your drive more comfortable. Currently there is not a trac bar from the manufacturers we carry available for your chassis.
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Updated by:
Lindsey S
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Kevin
8/6/2023
A great deafferents the rear sway bar. has made. So I bought the front one.