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

Roadmaster Front Anti-Sway Bar - 1-3/4" Diameter

Item # RM-1139-148
Our Price: $608.47
Anti-Sway Bars

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Shipping Weight: 61 lbs
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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 front 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-1139-148 or order online at Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Roadmaster Front Anti-Sway Bar - 1-3/4" Diameter. Anti-Sway Bars reviews from real customers.
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Roadmaster Anti-Sway Bars - RM-1139-148

  • Anti-Sway Bar
  • Roadmaster
  • Front
  • 1-3/4 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 front axle and to the frame to balance weight transfer and reduce body roll.


  • 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 front 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 rear anti-sway bar (sold separately) for absolute stability - available on certain applications only
  • Made in the USA


  • Bar diameter: 1-3/4"
  • 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.

1139-148 Road Master Anti-Sway Bar - Front

Replaces Roadmaster 1139-140 and 1139-206

Installation Details RM-1139-148 Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Roadmaster Front Anti-Sway Bar - 1-3/4" Diameter - RM-1139-148

Average Customer Rating:  4.8 out of 5 stars   (1777 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 front axle and to the frame to balance weight transfer and reduce body roll.


Had this installed along with a rear sway bar & steering stabilizer. The rig doesn’t wear me out anymore, I can drive all day long. Just the result I was hoping for.

2013 Ford F-53

Great company to deal with, sway bar & steering stabilizer look well built will be installing in a couple months

2018 Ford F-53

complete package of needed parts with very concise installation instructions
very good quality of the parts themselves and they will be more than adequate for the job they will perform THANKS.


The group at etrailer are absolutely great. UPS lost my order out of the box and delivered me an empty box. Called in to etrailer and they took care of the claim with UPS empty box was delivered on Wednesday I had a replacement on Saturday. Totally a five star service


Truly an improvement especially cornering. My Class A F 53 chassis suffered in strong winds and the sway bar helped in these situations as well.


needed to replace front anti sway bar on my 2004 Class A RV. not stiff enough. Long story short, folks at etailer fulfilled all aspects of ordering and shipping as they said. Very, very pleased with them and their product. Highly recommend.


again my parts came so fast and ahead of time ETrailer is the best place to get your stuff and their 100% Pros and easy to talk to and deal with.... !!



Simply amazing


I love both of the Roadmaster anti-sway bars I had installed right before a trip to Iowa. I purchased bushing kits for front and rear but, I didn't know the front sway bar came with new bushings. So I have an extra front sway bar bushing kit. The biggest difference I noticed right away was the handling on the highway. The people I talked to at etrailer were very helpful and always are when I call. Thanks


Everything fix correctly but when called in too you I was told that you didn’t have a sway bar that fit my motorhome I took it on my own and order it and it fit great Thank you


The Anti-Sway bar is a positive improvement. The coach still needs additional handling improvements but, no motorhome will handle like a car or pickup.

2013 Ford F-53

Quality product. Packaged exceptionally good and protective.
I have bought several great Roadmaster items from etrailer and it has always arrived on time. This order came a day early.
Very happy.


This was added after installing the rear bar for the same reason F53 handling is terrible. The front bar addition made driving our Thor 29M much more doable without enduring the constant swaying caused by bad roads wind gusts and passing vehicles. Wish I'd added these right after we bought the RV.


It made a great improvement to our motor home while driving down the highway. Very happy with the purchase


Haven't opened the stabilizer bars but I did open the Sumo Springs and the Snap Pads. All seemed to be there in good condition.

2013 Ford F-53

Fits great improvement in steering 100 per cent


Definitely a big difference in the drive! I was expecting longer bolts that hold the sway bar.


Best upgrade for a class A motorhome!



Still great but have had a four point Liquid Springs system to the suspension.


This sway bar was a priceless purchase! Easy driving now!


Excellent fit, easy instructions. Great sales support and information when placing the order


A little more difficult to install by myself than the rear, but still not that hard. Assistance on torque specks via their tech dept was outstanding.

2017 Thor ACE Motorhome

Super fast delivery. Best prices, thanks

2000 Ford F-53

Best money I ever spent, turned my motorhome from scary drive in the crosswind, to very manageable.15-20 mph crosswind easily keep in my own lane. Little to hardly any sway. It is 85% better. It was a very easy install. Quick shipping. I installed this on a 2000 Fleetwood f53 chassis.


Excellent instructions, easy to install, and yes the right side upper bracket needed to be removed from the frame to remove and replace new bolt.


received and installed the new Roadmaster part.

Bit extra effort solo, but completed in couple hours


Product retrofitted as per motor home match. Also install video was very helpful

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