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Roadmaster Polyurethane Bushing Kit for 1-1/2" Diameter, Factory Rear Anti-Sway Bar

Roadmaster Polyurethane Bushing Kit for 1-1/2" Diameter, Factory Rear Anti-Sway Bar

Item # RM-4139-125
Our Price: $155.05
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Attach these durable, flexible polyurethane bushings to the rear anti-sway bar of your vehicle and experience a better, more controlled ride. 1-800-940-8924 to order Roadmaster accessories and parts part number RM-4139-125 or order online at Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Roadmaster Polyurethane Bushing Kit for 1-1/2" Diameter, Factory Rear Anti-Sway Bar. Accessories and Parts reviews from real customers.
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Roadmaster Accessories and Parts - RM-4139-125

  • Anti-Sway Bars
  • Anti-Sway Bar Parts
  • Bushings
  • Roadmaster
  • 1-1/2 Inch Diameter
  • Rear Anti-Sway Bar

Attach these durable, flexible polyurethane bushings to the rear anti-sway bar of your vehicle and experience a better, more controlled ride.


  • Replacement bushings work with your factory, rear anti-sway bar to improve the overall stability of your vehicle
  • Flexible design keeps anti-sway system from being too rigid
  • Polyurethane is durable and resistant to damage caused by oil, gasoline and ozone
    • Less wear means less give in your anti-sway system and better support
  • 2 Bushings and necessary hardware included
  • Made in USA

Roadmaster Anti-Sway Polyurethane Bushings

Superior Construction

The lubricated bushings in your anti-sway system 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. These bushings, therefore, must be both durable and flexible. Polyurethane allows an appropriate amount of give and lasts longer than rubber, which is the standard material used in bushings, thus ensuring that the system is neither so rigid nor so malleable that it becomes ineffective.

4139-125 Roadmaster Bushing Kit for Rear Anti-Sway bar

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Roadmaster Polyurethane Bushing Kit for 1-1/2" Diameter, Factory Rear Anti-Sway Bar - RM-4139-125

Average Customer Rating:  4.9 out of 5 stars   (47 Customer Reviews)

Attach these durable, flexible polyurethane bushings to the rear anti-sway bar of your vehicle and experience a better, more controlled ride.


After disappointing schedule for ship delivery date and call to etrailer they made it right and got it picked wrapped and shipped
Received it today and got it installed
Ready to roll Saturday morning for trip to lake
Everything fit well and about hour and half installation time!


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


Great service, the part arrived quickly and when they said it would. They even followed up after the sale just to make sure it was a good customer experience.


The part came in quick and fit like a glove I’m a happy camper!


After 9 years One of our bushings had broken. We ordered this replacement set and they have been performing perfectly.

2016 Newmar Bay Star Motorhome

Product is great but make sure you get the correct size. This is for a 1 1/2" rear sway bar. Don't trust the fitting guide. Even though I have a 22K chassis, my sway bar is 1 3/8". Fortunately, Roadmaster has excellent customer service and fixed everything for no charge.

Etrailer Expert

Victoria B.


When looking at replacement sway bar parts, it is important to double check both the coachs GVWR as well as the diameter of the rear sway bar. Our fit guide lists 3 different replacement bushing options for the 2016 Newmar Bay Star 22,000 lb GVWR: 1-1/2 inch kit # RM-4139-125, 1-3/8 inch kit # RM-4139-300, and 1-5/8 inch kit # RM-4139-127. I have also linked the sway bar fit guide for your motor home.

1994 Ford F-53

The sway bar assembly and overload spring items for my F53 rv arrived as scheduled. All parts were packed well, so there was no shipping damage.
Very pleased with products, and instructions were easy to follow. Have already installed new sway bar system, front and rear spring overloads. While installing new sway bar system, noticed factory swag bar needed new bushings. Ordered them from etrailer, and they arrived in a week. Very pleased and would recommend etrailer to friends.

1997 National Dolphin

The kit I purchased was exact fit, came with excellent instructions and was shipped in a timely manner. All the parts we needed were included and everything was a perfect fit to replace the worn out OEM rear sway bar bushings on our 1997 National Dolphin RV mounted on the Ford F53 chassis. Thanks to all the representatives for the ease of ordering, exact quote for delivery, and for stocking the kit I needed

2008 Tiffin Allegro Motorhome

I received the Roadmaster anti-sway bar bushing replacement kit in record time (3 days). I will have it installed after Thanksgiving. I will report any problems in installation. The instructions and diagrams were very helpful. Thank you.

2005 Ford F-53

Product arrived in just a short time and even had new brackets and new bolts, which was great since one of the brackets had been bent and a bolt was missing. Thanks etrailer ! Repairs have been completed and a test drive is scheduled in the next day or two.


After multiple calls about order status - it was determined that order was sent to vendor who never shipped the item - finally, etrailer took over the original order and processed the shipment. The item was exactly as described and met my needs. Thank you, etrailer!



2009 Gulf Stream Independence Motorhome

easy fit works well


As always, great service and delivery.


Customer service was exceptional, the parts were top quality and easy to install, and the performance is very good .


it works and fits


Great product. My Motorhome was extremely loose from side to side or had a roll over effect traveling down the road. These bushings corrected my issue and I’m very satisfied with this product.

2002 Ford F-550 Cab and Chassis

Put bushings on tonight. Was easy to do and work great. Thanks etrailer!!

1998 Ford F-53

Great quality, easy installation. etrailer gave great technical advice on installation.


Works like a charm. followed your instructions and it took about 35 minutes. Best money I ever spent
Warren B


Very accurate description of item, and customer service double checking to make sure it fit. Very fasy shipping


The old ones that I took out were shot and installing these new ones fixed a lot of my wandering problems with my motor home....


The product and customer service exceeded


They had the part in stock that no one else had.Check out was a breeze .Super fast shipping had it in two days .



Show More Reviews

See what our Experts say about this Roadmaster Accessories and Parts

  • Does Roadmaster Polyurethane Bushing Kit # RM-4139-125 Need Nuts to Install
    Since the bolts that come with the Roadmaster Polyurethane Bushing Kit # RM-4139-125 are designed to attach to threaded parts of the vehicle suspension nuts are not included or needed. Check out the install video I attached for more info on how it installs.
    view full answer...
  • Replacement Bushing Kit for Rear Sway Bar of 1998 Santara Couchmen
    Your 1998 Santara Coachmen was built on a Ford F-53 chassis so the # RM-4139-125 that you referenced would be the correct rear bushing kit for the rear sway bar.
    view full answer...
  • Installation Instructions for Roadmaster Sway Bar Bushing Kits for 1997 Ford F-53 V8 Chassis
    I am not sure what is wrong with the links but I have included a picture of the instructions for the rear, # RM-4139-125, and for the front, # RM-4139-127, for your RV built on the 1997 Ford F-53. V8 chassis. The rear is on the top and the front is on the bottom.
    view full answer...
    Image 1 for
  • Do the Roadmaster Replacement Bushings Need to be Pressed In for the Install?
    Some of the bushings on the Roadmaster # RM-4139-125 will need to be pressed in, but it is not overly difficult. I included an install video we have of a similar Roadmaster kit that will show how this needs to be done.
    view full answer...
  • Does Roadmaster Bushing Kit # RM-4139-125 for Ford F53 Include Steel U-Brackets
    The Roadmaster Polyurethane Bushing Kit for 1-1/2-Inch Diameter Factory Rear Anti-Sway Bar, part # RM-4139-125, includes two polyurethane bushings, steel U-shaped brackets plus a bag of installation hardware. If you refer to the linked photo that shows a complete sway bar kit you will see two arrows indicating a pair of bushings with the steel U-brackets. Two of these are included in the replacement kit along with the bushings and hardware.
    view full answer...
    Image 1 for
  • Installation Instructions for part # RM-4139-125
    I apologize for the issue with the instructions link. I attached pictures that I took from the installation instructions that will show you how it installs.
    view full answer...
    Image 1 for Image 2 for Image 3 for
  • Replacement Poly Bushings for Rear Anti-Sway Bar on a 2011 Tiffin Allegro on a Ford F-550 Chassis
    Rear poly bushing kit # RM-4139-125 is indeed a fit for your 2011 Tiffin Allegro built on a Ford F-550 chassis. Roadmaster notes that some of the endlink parts may not be used in the installation and that the fit assumes a 1-1/2 inch OEM bar. Your bar at 1-27/64 inches (1.42 inches) is very close but ultimately too small for a proper fit and you will need a different option. The other option is # RM-4139-300 for a 1-3/8 inch diameter bar. This is actually closer to the 1.42 inch bar...
    view full answer...
  • Replacement Bushing Kit for 2004 Fleetwood Southwind Front Anti-Sway Bar
    We do have bushings for your 2004 Fleetwood Southwind front anti-sway bar. If you have the 1-1/2" diameter anti-sway bar you need the Roadmaster Polyurethane Bushing Kit # RM-4139-125. If you have the 1-5/8" you need the # RM-4139-127. Both include the 2 bushings and the necessary hardware for installation.
    view full answer...
  • Anti-Sway Bar Bushings For 2005 Ford F-550 Chassis Class A Motorhome
    We do have bushing kits for the OEM anti-sway bar on your Sea Breeze built on a 2005 Ford F-550 chassis, and the bushings include the brackets as well. There are different bushings depending on the diameter of your anti-sway bar, so you will need to measure it to ensure you get the right kit, and I'll list out the options for you: - Rear 1-1/2" Diameter Bar: Roadmaster Polyurethane Bushing Kit for 1-1/2" Diameter, Factory Rear Anti-Sway Bar # RM-4139-125 - Rear 1-3/8" Diameter Bar: Roadmaster...
    view full answer...
  • Correct 2009 Class A Newmar Canyon Star RV Rear Sway Bar Bushing Replacement Kit
    To replace/upgrade the bushings on the rear factory sway bar of your 2009 Class A Newmar Canyon Star RV you need one of the following Roadmaster kits based on the diameter of your factory sway bar: - 1-3/8" Diameter # RM-4139-300 - 1-1/2" Diameter # RM-4139-125 These are going to be a nice upgrade to what you currently have.
    view full answer...
  • Front Sway Bar Bushing that Fits 1-1/2 inch Diameter 2016 Thor ACE 29.4
    We have a bushing kit that fits the 1-1/2 inch sway bars that it sounds like you need with the part # RM-4139-125 which is designed for that size sway bar. This comes with a complete set for everything. To correct the steering issue of your motorhome a steering stabilizer would be what you'd need with the Roadmaster Exact Center stabilizer part # RM36RR.
    view full answer...
  • Replacement Bushing for Rear Sway Bar of 2007 Fleetwood Bounder 33R
    We do have replacement bushing and mount kits that fit your 2007 Fleetwood Bounder 33R for the rear sway bar but it depends on what the diameter of your factory bar is. If the diameter is 1-3/8 inch you'd want the part # RM-4139-300 or if it's 1-1/2 inch # RM-4139-125. Since there's no way for us to know which diameter bar you have now you'll have to run out and measure to determine what you'd need.
    view full answer...
  • Upgrading to Polyurethane Anti-Sway Bar Bushing On a 1998 Damon Daybreak
    The Roadmaster Polyurethane Bushing Kit part # RM-4139-127 for front and part # RM-4139-125 for rear are correct for a 1998 Damon Daybreak. We do offer just the replacement bushings for these but they are not designed to be used with the factory brackets. If done so, you risk the chance of the bushing slipping out causing damage as well as risking losing control of the motorhome. I don't have any dimensional drawing of the replacement bushings unfortunately.
    view full answer...
  • Replacement Anti-Sway Bar Bushings for Motorhome On Ford F-53 Chassis
    In order to replace just the factory anti-sway bar bushings on a Ford F-53 Chassis you have a few options which will be based on the location of the anti-sway bar (front/rear) and the gross vehicle weight rating of the coach (15,700 lbs, 16,000 lbs etc.) or diameter of the factory sway bar (1-1/2", 1-3/8", or 1-5/8"). If you need bushings for a front anti-sway bar and it is 1-5/8" diameter then you can use the Roadmaster Polyurethane Bushing Kit part # RM-4139-127 but if you need bushings...
    view full answer...
  • What is the Rear Sway Bar Size of a 2002 Ford F-53
    The only way to know if the Roadmaster Polyurethane Bushing Kit for 1-1/2" Diameter, Factory Rear Anti-Sway Bar # RM-4139-125 will fit the rear sway bar on your 2002 Ford F-53 chassis is for you to measure them using a Digital Caliper, like part # PTW80157. Since different RV manufacturers will install their own preferred equipment on any given chassis you have a much more guarantee of a fit if you can check the measurement physically.
    view full answer...
  • Front Anti-Sway Bar For 2000 Ford F-350 Super Duty 4WD
    I checked with Roadmaster and the 4139-125 is not a fit for the factory anti-sway bar of the 2000 Ford F-350 4WD; per Roadmaster that part is a fit for some models of F-53 and F-550 Class A motorhomes. While there isn't a bushing kit designed for the factory anti-sway bar of your 2000 F-350, there is a replacement front anti-sway bar: - Roadmaster Front Anti-Sway Bar # RM-1139-155
    view full answer...
  • Rear Factory Anti-Sway Bar Bushing Upgrade for 1999 Fleetwood Bounder 34v on Ford F53 Chassis
    I did some checking on your 1999 Fleetwood Bounder 34v and it appears that it was built on the Ford F53 chassis which is a common one for Class A RVs. There is a bushing upgrade kit for the rear anti-sway bar and it is # RM-4139-125. The single bushing # RM-205217-10 may not work in the factory mounts by itself which is why I recommend going with the whole kit.
    view full answer...
  • Which Replacement Bushings for 1-1/2 Inch Diameter Roadmaster Rear Anti-Sway Bar on 2017 Thor 24.1
    It sounds like you're looking for the Roadmaster Polyurethane Bushing Kit for 1-1/2" Diameter, Factory Rear Anti-Sway Bar # RM-4139-125, which would fit on your 1-1/2" diameter Roadmaster rear anti-sway bar. These are definitely better than the factory bushings that are used and would be a good place to start.
    view full answer...
  • Suspension Enhancement for Itasca RV on 2014 Ford F-53 Chassis
    I recommend having your suspension checked out to make sure there are no issues, but if everything is fine, suspension enhancement springs would help level your Itasca. I could not guarantee this will "fix" your lean but the SumoSprings Maxim Custom Helper Springs # SSR-187-54-1 are designed to help keep your RV level and minimize sway. These springs are for 2-wheel drive models - as each of the available springs we offer are - with a GVWR between 20,000 and 26,000 lbs. As for the bushings,...
    view full answer...
    Image 1 for
  • Replacement Bushings 2007 Four Winds Hurricane On 2006 Ford 53 Chassis
    Depending on the diameter of your existing bushings the Roadmaster Polyurethane Bushing Kit for 1 5/8 inch diameter # RM-4139-127 may fit. We also offer a few other sizes to choose from. Rear 1 1/2 inch Diameter Bar: Roadmaster Polyurethane Bushing Kit for 1 1/2 inch Diameter, Factory Rear Anti-Sway Bar # RM-4139-125 Rear 1 3/8 inch Diameter Bar: Roadmaster Polyurethane Bushing Kit for 1 3/8 Diameter, Factory Rear Anti-Sway Bar # RM-4139-300 We also have Replacement Split Bushing for...
    view full answer...
  • Front Axle Stabilizer for a 1999 Fourwinds Infinity on a Ford F53 Chassis
    Blue Ox does make a great product but Roadmaster's stuff works well so I would go with it, save some money, and maybe look into putting some of that back into stabilizing the rear end as well. So for the front axle use the Roadmaster TruTrac, # RM-TRACV-10B. For the rear you can upgrade the factory sway-bar bushings with kit # RM-4139-125. Upgrading just the bushings will also help provide a more stable ride compared to the stock bushings. I have included a link to our help article on...
    view full answer...
  • Replacement Sway Bar Bushings For Factory Sway Bars On 2003 Tiffin Allegro With Ford F-53 Chassis
    You will need to confirm if you have a 1-3/8" or 1-1/2" diameter rear sway bar on your 2003 Tiffin Allegro RV motorhome with the Ford F-53 chassis. The Roadmaster Polyurethane Bushing Kit # RM-4139-300 will upgrade you to polyurethane bushings for a 1-3/8" bar while the Kit # RM-4139-125 fits the 1-1/2" sway bar. We do also have the Kit # RM-4139-127 if you would like to change the front bushings as well. Or you can upgrade the front sway bar to the Roadmaster Front Anti-Sway Bar # RM-1139-148...
    view full answer...
  • Roadmaster Vehicle Sway Bar and Steering Stabilizer Recommendation for 2019 Winnebago Intent 31P
    Your 2019 Winnebago Intent 31P is built on a Ford F53 Chassis and based on the GVWR of 18,000 lbs I will make my recommendation for the correct front and rear anti-sway bar as well as the steering stabilizer below: # RM-1139-148 - Intended to replace an 1-3/4 inch diameter OEM front sway bar # RM-4139-125 - Intended to replace an 1-1/2 OEM rear sway bar OR # RM-4139-300 - Intended to replace an 1-3/8 OEM rear sway bar Note that some of the endlink parts may not be used when installing...
    view full answer...
  • Can TST TPMS Monitor Brightness Be Manually Adjusted
    The brightness on the TST color displays, like what comes with the TST TPMS for RVs # TST-507-FT-6-C, have an auto-adjust setting for the monitor so there isn't a way to manually adjust this. Since you're having issues with it not being bright enough you may need to change the location of the monitor. There is an "eye" sensor on the back of the monitor that can sense how bright the surroundings are so if the back of the monitor is in a cubby or shadow then you need to move it so it sees...
    view full answer...

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