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. Call 800-298-8924 to order Roadmaster anti-sway bars part number RM-1259-108 or order online at Free expert support on all Roadmaster products. Guaranteed Lowest Price and Fastest Shipping for Roadmaster Rear Anti-Sway Bar for Motor Homes. Anti-Sway Bars reviews from real customers.
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Anti-Sway Bars > Anti-Sway Bar > Rear > Steel w Polyurethane Bushing > 1-1/2 Inch Diameter > Roadmaster

Roadmaster Rear Anti-Sway Bar for Motor Homes

Roadmaster Anti-Sway Bars

(2 reviews)

Code:   RM-1259-108



Custom Fit Product

Shipping Special

Shipping Weight: 104 pounds


Roadmaster Anti-Sway Bars - RM-1259-108

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.


  • 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 RV 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, cadmium-plated 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 USA


  • Bar diameter: 1-1/2"
  • Limited 1-year 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 motor home's frame and its rear axle, using the axle as a brace to more effectively balance the shifting weight of your motor home 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 cadmium-plated 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.

1259-108 Roadmaster Anti-Sway Bar - Rear

RM-1259-108 Installation InstructionsInstallation Details RM-1259-108 Installation instructions

This Product Fits The Following Vehicles

2005 - 2010 Monaco LaPalma Diesel Engine only

2000 - 2009 Workhorse W-Series W20

2000 - 2009 Workhorse W-Series W22

2004 - 2009 Workhorse W-Series W24

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Customer Reviews

Roadmaster Rear Anti-Sway Bar for Motor Homes - RM-1259-108

Average Customer Rating:  5.0 out of 5 stars   (2 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.

- RM-1259-108

by: Gary H10/21/2014

Workshorse W22

I had side-to-side sway in my 35 foot Class A motorhome on a Workhorse W-22 chassis. I initially thought shocks would help but after reading the benefits of rear sway bars on e-Trailer, I bought them. Wow, what a difference in handling and sway. As it turns out, this is what I needed and could have wasted $800 on shocks had I not read e-trailer's article and then confirming with my RV shop. Thanks e-trailer for a great recommendation, a great price and fast delivery. My upcoming 3,400-mile trip is going to be much more relaxing. 157033

- RM-1259-108

by: Nick S.12/13/2012

Great customer service and follow throu gh! 61406


Ask the Experts about this Roadmaster Anti-Sway Bars
Do you have a question about this Anti-Sway Bar?

  • Rear Anti-Sway Bar for a 2007 Winnebago Built on a Workhorse W24 Chassis
  • Roadmaster rear anti-sway bar # RM-1259-109 will fit your 2007 Workhorse W24 chassis. It is intended for models that are 33 feet or longer. Since yours is 36 feet long it fits that description. If you also want to upgrade the front of the RV you can use # RM-1259-105. Some other helpful items that will greatly improve ride quality and drivability include a steering stabilizer such as # RM-RBK13-RSSA, front axle stabilizer # TT2304 and rear axle stabilizer # RM-TRACW-22 (the rear one...
    view full answer...

  • Improving the Ride Quality of an RV Built on a 2005 Workhorse W22 Chassis
  • Yes! Probably the single best addition you can make to provide better handling in your RV would be to install a rear anti-sway bar. Helper springs treat the symptom but not the cause like an anti-sway bar would. There are 2 rear sway bar options for your 2005 Workhorse W22: # RM-1259-108 and # RM-1259-109 (for applications 33 feet or longer). Additional products for even more stability include axle stabilizers: # RM-TRACW-22 or # TT2304 for the front and # TT2601 for the rear. And...
    view full answer...

  • Recommendation for Roadmaster Front and Rear Sway Bars for a 2005 Fleetwood Bounder 34F
  • Yes I can! For a front sway bar to fit your 2005 Fleetwood Bounder 34F built on a Workhorse W22 chassis you would want the Roadmaster Front Sway Bar part # RM-1259-105 and for a rear sway bar you would want the part # RM-1259-108. I confirmed these fits with Roadmaster so they will work very well for your vehicle.
    view full answer...

  • Parts Recommended that Will Reduce Sway and Driver Fatigue in a 2010 Fleetwood Fiesta Motor Home
  • One way to fix sway problems on a motor home is to brace the rear axle, to eliminate excessive axle side movement. The Blue Ox TigerTrak, # TT2601, and similar products, mount between the rear axle and the chassis and hold the axle in place. This will greatly reduce rear end sway. The TT2601 is the correct part for the Workhorse W22 chassis. This part is very similar to the Davis TruTrac bars made by Roadmaster and you will see similar results. Adding front and rear sway bars are an...
    view full answer...

  • Roadmaster Rear Anti-Sway Bar for 2005 Newmar Kountry Star 3302
  • According to my research, your Newmar Kountry Star uses a Workhorse W-22 chassis, which would use the # RM-1259-108 Rear Anti-Sway Bar. Unless your motorhome uses a Firestone Ride-Rite air suspension kit, everything needed to install the Roadmaster anti-sway bar is included. If your motorhome does use the Firestone Ride Rite air suspension, an additional bracket kit, part # RM-590054-00 will need to be welded to the bottom of the air bag bracket. The RM-1139-143 is designed for motorhomes...
    view full answer...

  • Rear Anti-Sway Bar for a 2003 Winnebago Adventurer on a Workhorse Chassis
  • Regardless of the length of your RV you can use the Roadmaster anti-sway bar # RM-1259-108 (for 2003 Workhorse W20, W22, and W24 chassis). Bar # RM-1259-109 only fits the W22 and W24 chassis that are 33 feet long or longer like you said. Your 2003 Winnebago Adventurer 33V is 33 feet and 6 inches long so you can use this bar. I have also included a link to our help article on heavy duty vehicle stability for you.
    view full answer...

  • Rear Sway Bar Recommendation for a Workhorse W22 Workhorse Winnebago Adventurer
  • Actually for your W22 chassis RV the correct rear sway bar would be the # RM-1259-109 for if you are 33 feet or longer or part # RM-1259-108 for if you are shorter than that. There will be some drilling required for installation. I attached instructions for both products for you to check out as well.
    view full answer...

  • Sway Bar Availability for Workhorse W-Series Motorhomes
  • The two sway bars you referenced are designed to fit different versions of the W-Series Workhorse motorhomes. The part # RM-1259-108 is designed to fit the: 2000 - 2009 Workhorse W-Series W20 2000 - 2009 Workhorse W-Series W22 2000 - 2009 Workhorse W-Series W24 And the part # RM-1259-118 is designed to fit the: 2005 - 2009 Workhorse W-Series W16 2005 - 2009 Workhorse W-Series W18
    view full answer...

  • Rear Sway Bar Recommendation for a 2002 Workhorse W20
  • For your 2002 Workhorse W20 chassis you would want the part # RM-1259-108 as a rear sway bar and not the # RM-1259-109 that you referenced.
    view full answer...

Do you have a question about this Anti-Sway Bar?


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Information for this part was:

Photos by:
Theodore B
Written by:
Lindsey S
Expert Research:
Michael H
Expert Research:
Jameson C

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Info for this part was:

Photos by:
Theodore B

Written by:
Lindsey S

Expert Research:
Michael H

Expert Research:
Jameson C

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