bing tracking image
  1. Accessories and Parts
  2. Roadmaster
  3. Anti-Sway Bars
  4. Anti-Sway Bar Parts
  5. U-Bolts
  6. Rear Anti-Sway Bar
Extended U-Bolt Kit for Roadmaster Anti-Sway Bar

Extended U-Bolt Kit for Roadmaster Anti-Sway Bar

Item # RM-590050-00
lowest price pledge
Retail:$189.82
Our Price: $136.77
You Save: $53.05
Accessories and Parts
This item qualifies for Free Shipping
Shipping Weight: 18 lbs
Quantity: 
In Stock
Roadmaster Anti-Sway Bar Parts Accessories and Parts - RM-590050-00
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Need help with installation?
Locate installers near me
Use these 15-7/8" long U-bolts to install your Roadmaster anti-sway bar. The extended-length bolts are designed to replace your vehicle's square OEM U-bolts if they are too short. Call 800-298-1624 to order Roadmaster accessories and parts part number RM-590050-00 or order online at etrailer.com. Free expert support on all Roadmaster products. Guaranteed Lowest Price and Fastest Shipping for Extended U-Bolt Kit for Roadmaster Anti-Sway Bar. Accessories and Parts reviews from real customers.
  • All Info
  • Reviews (25)
  • Q & A (0)
  • Videos (2)
  • Photos
  • Why etrailer?

Roadmaster Accessories and Parts - RM-590050-00

  • Anti-Sway Bars
  • Anti-Sway Bar Parts
  • U-Bolts
  • Roadmaster
  • Rear Anti-Sway Bar

Use these 15-7/8" long U-bolts to install your Roadmaster anti-sway bar. The extended-length bolts are designed to replace your vehicle's square OEM U-bolts if they are too short.


Features:

  • U-bolts replace square factory U-bolts that are too short to allow installation of your anti-sway bar
    • Roadmaster's anti-sway bars (RM-1139-143, 1139-144, and RM-1139-149) are used in conjunction with your vehicle's factory bar and mounts using the factory U-bolts
  • Made in the USA
  • Limited Lifetime Warranty


Specs:

  • Usable length: 15-7/8"
  • Thread length: 5-1/2"
  • Inside width: 4-1/4"


Dimensions of U-Bolt


590050-00 Roadmaster Anti-Sway Bar Extra Long U-Bolt Kit





Video of Extended U-Bolt Kit for Roadmaster Anti-Sway Bar

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Roadmaster Anti-Sway Bars RM-590050-00 Review

Speaker 1: Today, we're going to take a look at the extended U-bolt kit for the Roadmaster anti-sway bars. Now, these 15 and seven eighth inch long U-bolts are used to install your Roadmaster anti-sway bars to your vehicle. Now, the Roadmaster anti-sway bar kits number RM-1139-143, RM-1139-144, and the RM-1139-149 are all used in conjunction with the vehicle's factory bar and it mounts using the factory U-bolt.Some vehicles that those kits fit on, they may require these extended U-bolts. Basically, these extended length U-bolts are designed to replace your vehicle's square factory U-bolts if they're too short. These parts are made in the USA, and just to give you some dimensions on this. The usable length, which will be measured from the end here to the inside, going to be right at 15 and seven eighth inches.

The thread length, in other words how much thread is on the end of each one goes up to there, is going to be right at five and a half inches, and in the inside width is going to be right at four and a quarter inches wide.But, that should do it for the review on the extended U-bolt kit for the Roadmaster anti-sway bars.


Customer Reviews

Extended U-Bolt Kit for Roadmaster Anti-Sway Bar - RM-590050-00

Average Customer Rating:  5.0 out of 5 stars   (25 Customer Reviews)

Use these 15-7/8" long U-bolts to install your Roadmaster anti-sway bar. The extended-length bolts are designed to replace your vehicle's square OEM U-bolts if they are too short.

- RM-590050-00
by:

Prior to installation of this kit my RV acted like it was going to tip over as it swayed from side to side when I made a turn or was hit by a cross-wind. Post install the drivability of my 37' RV increased by 100%.



- RM-590050-00
by:

I purchased a Roadmaster sway bar kit and longer shackle bolts from E-Trailer. The sway bar came on time with free shipping! Upon closer inspection I realized I needed the longer shackle bolts. I called and found it was in stock and available in 2 days with free shipping! Their prices are very competitive and then you get excellent service. It also helps that the shipping was free at this time.


Comments
Thank you for asking. The sway bar continues to perform as expected.
RCWAZ - 10/11/2017



- RM-590050-00
by:

I ordered the wrong U-bolts with my original order. Make sure you crawl under your coach and look before you order. I had a 50/50 shot and got it wrong. I definitely needed the longer U-bolts installing the rear sway bar on my 24000 GVW coach. The exchange with etrailer went through without a problem. Very good company to deal with. I had to pay a restocking charge but that was to be expected seeing how I made the mistake.



- RM-590050-00
by:

Order received promptly new tail lights installed also rear sway bar thanks



- RM-590050-00
by:

Do not but from anyone else. etrailer and their staff are second to none. Their follow through is the best in the business. Not to mention they let you know how long your wait will be. Who does that!!! I have ordered 7 items in the past month and have been more than pleased with all. Thank you etrailer staff!!



- RM-590050-00
by:

Paula S at Roadmaster was a big help when I ordered our front and rear sway bars. She recommended these extended U-bolts and the mechanic who installed them said they were good and necessary.



- RM-590050-00
by:

ALL THE ITEMS FROM ROAD MASTER WORKING AND GREAT AND MADE A GREAT DIFFERENCE IN THE RIDE OF OUR MOTOR HOME ...


Comments
still working great
John A - 12/22/2019



- RM-590050-00
by:

I purchased these U-bolts along with the Roadmaster rear anti-sway bar upgrade. I planned to install myself, but as it turned out installation required a very large torque wrench, that I did not have. As a note, a call to a third-party U-bolt source tech support suggested that the original U-bolts should not be reused, even if they're long enough. Apparently suspension U-bolt threads are cut in a manner not intended to be retorqued.



- RM-590050-00
by:

See review on our purchase of the Frt. Anti-Sway Bar



- RM-590050-00
by:

These did the job and worked great. They were the same length as my bolts on my 2019 Coachmen Mirada 35BH (F53) chassis.



- RM-590050-00
by:

We haven't installed these yet, so this is more a review of etrailer's service and shipping. All I can say is these guys know their stuff and are more than happy to share their wealth of experience with you prior to purchase and after the purchase. They will not leave you hanging and wondering how, when, where-ing your purchase. They have how-to videos, knowledge base articles, and vehicle match algorithms that all help you pick and install the correct product for your vehicle. The shipping is surprisingly fast........fast fast. My confirmation email said it would be 7-8 days and the packages arrived in two days. When I complete the install I will update this review with fit and performance data. So buy with confidence! Paul



- RM-590050-00
by:

These make life so much easier and are really essential with dual wheel setups.



- RM-590050-00
by:

This is the solution for the F53 Road Master Anti Sway bars #1193-144. These u bolts are over an inch longer than the stock ones, making Anti Sway bar install easy and safe. Ordered and delivered as scheduled, questions were answered by knowledgeable friendly staff.



- RM-590050-00
by:

Product made a great difference in the handling of my RV. Very easy to install. Due to shoulder surgery my daughter installed it for me!!



- RM-590050-00
by:

Have not had a chance to install yet. Hopefully this week. Service is always excellent from etrailer however.



- RM-590050-00
by:

Stopped the rocking and made driving sa fer.



- RM-590050-00
by:

Easy installation!



- RM-590050-00
by:

product was as ordered and arrived in great shape



- RM-590050-00
by:

PERFECT FIT NO MISTERYS



- RM-590050-00
by:

GOOD PRODUCT



- RM-590050-00
by:



- RM-590050-00
by:



- RM-590050-00
by:

great service competively priced. Very satisfied



- RM-590050-00
by:



- RM-590050-00
by:


25
25

Ask the Experts about this Roadmaster Accessories and Parts



  • Dimensions of # RM-590050-00 U-bolt For Roadmaster Anti-Sway Bar
    The # RM-590050-00 U-bolt is 3/4 inches in diameter with a 16 thread per inch thread pitch. The length of the U-bolt is 15-7/8 and the distance between the legs is 4-1/4 inches, as you can see in the diagram I've provided for you.
    view full answer...
    Image 1 for
  • Is Extended U-Bolt Kit Needed when Installing Anti-Sway Bar on 2000 Ford F53 Class A Motor Home
    The factory u-bolts will need to be long enough to account for the extra 1/2 inch of thickness and still have at least 3 threads exposed past the nut when properly installed. If you look at the u-Bolts now you can measure how much of u-bolt ends extend past the nut. Based on that you would be able to tell if you need u-bolt kit # RM-590050-00 or not.
    view full answer...
  • Installing Extended U-bolts for Roadmaster Rear Anti-Sway Bar 1139-143 on 2004 F-53 Chassis
    The Roadmaster Rear Anti-Sway Bar for Motorhomes # RM-1139-143 can use your factory u-bolts if they are long enough. If they are not, then Roadmaster recommends using the 7/8 inch diameter u-bolts that are longer (most likely the larger diameter due to length needed to ensure strength). I've attached a couple photos from the installation instructions to assist with the size and torque. When torque specs are so large either a large special torque wrench is required or installers are...
    view full answer...
    Image 1 for Image 2 for Image 3 for
  • Rear Anti-Sway Bar and U-Bolt Replacement Kit Installation on a 2017 Canyon Star on F-53 Chassis
    The rear anti-sway bar # RM-1139-149 will fit the V10 Ford F-53 chassis if the gross vehicle weight rating is 22K, 24K, or 26K. Based on your description you will need # RM-590050-00 u-bolt replacement kit. I have included a link to a video showing an example installation for you. It is a good idea to lift the RV and then use jack stands to support just the axle. With the vehicle supported elsewhere and the axle supported by jack stands it is less likely for the vehicle to "slip" off the...
    view full answer...
  • Are Extended U-Bolts Needed To Install the Roadmaster Rear Sway Bar On a 2018 Jayco Precept 36T
    The Extended U-Bolt Kit part # RM-590050-00 (square) or part # RM-590050-10 (round) may be needed to install the Roadmaster Rear Anti-Sway Bar part # RM-1139-149 on your 2018 Jayco Precept 36T but I cannot give you a yes or no answer. The only way to know for sure would be to crawl under the motorhome and take a look at the factory u-bolts to ensure there is enough threads left to install an additional 1/2" plate.
    view full answer...
  • Are Larger U-Bolts Needed For Installing A Roadmaster Rear Anti-Sway Bar On A F-53 Chassis
    The mounting plate for the Roadmaster Rear Anti-Sway Bar Item # RM-1139-149 will be attached to the U-bolts so you'll be able to look at the U-bolts and see if there's going to be enough to threads to place the plate on and retighten the nuts. For U-bolts with a square top, order kit # RM-590050-00. For U-bolts with a round top, order kit # RM-590050-10. I've attached a video that will walk through installation step by step for you as well.
    view full answer...
  • Recommended Anti-Sway Bar for 2006 Fleetwood Bounder Gas Engine on Ford F53 Chassis
    I did a little bit of research and it looks like 2006 Fleetwood Bounder with a gas engine was built on a Ford F53 chassis like you mentioned, so the correct rear anti-sway bar for your rig with a GVWR of 20,500-lbs is the Roadmaster # RM-1139-143. It should be noted that the factory u-bolt may not be long enough for the factory nut, washer and 1/2" plate when used with this bar. If that is the case, if you have square top u-bolts will need # RM-590050-00, and if you have round top u-bolts...
    view full answer...
  • Recommendations for Reducing Front Sway on a 1989 E350 Van Motorhome
    The Roadmaster Front Anti-Sway Bar part # RM-1139-100 that you referenced is confirmed to fit your 1989 Ford Camper Van and would minimize sway and driver fatigue by improving the stability and driveability of your vehicle. You might also check to make sure you shocks are in good condition and that your wheels have good alignment.
    view full answer...
  • Recommended Rear Anti-Sway Bar for 2018 Fleetwood Bounder on F-53 Chassis
    The Roadmaster Rear Anti-Sway Bar # RM-1139-149 referenced in your question is exactly what you need for your Ford F-53 chassis that features the V10 engine and 22,000 pound GVWR. This will do a great job of minimizing sway and driver fatigue by improving the stability and driveability of your RV. It will simply mount to the rear axle and to the frame to balance weight transfer and reduce body roll. No drilling will be required during installation. As you mentioned, you may need to add...
    view full answer...
  • Roadmaster Rear Sway Bar and Extended U-Bolt Kit Recommendation for a 2014 Ford F-53
    You will need to check the U-bolts you have currently to determine if there is enough thread for the 1/2 inch spacer that comes with the # 1139-144. You would need room for the spacer and still have 3 threads showing on the u-bolt. That is the only confirmed way to know if you will need the long U-bolt kit part # RM-590050-00 as well. Also, you should note that u-bolts should only be torqued once so going with this kit now will allow you to have everything you would need and you would...
    view full answer...
  • Roadmaster Sway Bar Fit for Front and Rear of 2016 Bounder 33c Class A Motorhome on a F53 Chassis
    For your 2016 Bounder 33c Class A Motorhome on a F53 Chassis, I'd be happy to help you with the proper fit Roadmaster Sway Bars for the front and rear. For the rear, the Roadmaster Rear Anti-Sway Bar for Motor Homes, # 1139-144, is the proper fit for your coach. This kit is designed to improve the handling characteristics by reducing body roll and balancing weight transfer when cornering. It is designed to work in conjunction with your vehicle's suspension system. It is designed to...
    view full answer...
  • Front and Rear Sway Bars Needed for a 2012 Winnebago 37F on a 2011 Ford F-53 Chassis
    You are correct in that you will want to be looking at fits for the 2011 Ford F-53 chassis as opposed to the 2012 year. For your Class A motorhome with a V10 you will want to use the Roadmaster Front Anti-Sway Bar # RM-1139-140 which is 1-3/4" in diameter, and the Roadmaster Rear Anti-Sway Bar # RM-1139-149 which is 1-5/8" in diameter. Since your motorhome is rated for 24,000 lbs the bar with the 1-5/8" diameter will work great. Please note that you will want to check to ensure there...
    view full answer...
  • How to Determine if Longer U-Bolts are Needed When Upgrading Anti-Sway Bar for 2015 Vista 27N
    To determine whether or not a longer U-Bolt kit is needed when you install the Roadmaster Rear Anti-Sway Bar # RM-1139-146 on your 2015 Winnebago Vista 27N Motorhome you need to look at your current U-Bolts and take a measurement. The bracket that comes with the anti-sway bar kit is 1/2" thick so you just have to make sure that you have 1/2" of extra space on your current U-Bolts plus room to have 3 threads left over. If you have enough room then you don't need the longer U-Bolts. If you...
    view full answer...
  • Front and Rear Anti-Sway Bars for 2018 Holiday Rambler Reno 29M on Ford F-53 Chassis
    It looks like your Holiday Rambler Reno M29 was built on a Ford F-53 chassis. For the front anti-sway bar, you'd use # RM-1139-140. For the rear, you'd use # RM-1139-149. Just a note about the # RM-1139-149- if the factory U-bolts aren't long enough, you'll need longer ones. To determine if what's currently there will work for you, measure how much of the current u-bolt is extending pas the retaining nut. If there isn't 1/2 an inch plus at least three threads sticking out, you'll need...
    view full answer...
  • Recommended Sway Bar For 2019 Thor Motor Coach Challenger 37FH On Ford F-53 Chassis 24,000 GWR
    I recommend Roadmaster Rear Anti-Sway Bar part # RM-1139-149 and the front Roadmaster Front Anti-Sway Bar part # RM-1139-148 for the 2019 Thor Motor Coach Challenger 37FH On Ford F-53 Chassis 24,000 GWR. The factory anti-sway bars are not as thick as these after market bars so they do a better job at improving the drive-ability and reducing the sway by balancing the weight. I have attached an installation video of the bars for your reference. I do recommend to check to ensure there is...
    view full answer...
  • Correct Rear Anti-Sway Bar for 1991 Class A Motorhome on Ford F53 Chassis
    I have spoken with one of my contacts at Roadmaster, who confirmed that the Anti-Sway Bar Kit, part # RM-1139-143 that you referenced will indeed fit your Class A motorhome on the 1991 Ford F53 Chassis. This bar will be used ALONG WITH the existing factory bar. If the existing U-Bolts are not long enough to accommodate both the OEM and Roadmaster Anti-Sway bar, extended u-bolts are offered, part # RM-590050-00. To see the products I have recommended as well as installation details, click...
    view full answer...
  • Rear Anti-Sway Bar for a 2016 Thor Toy Hauler Built on a Ford F-53 Chassis with Triton V10 Motor
    The 2016 Thor Toy Haulers are large, ever for toy haulers. What I recommend is Roadmaster rear anti-sway bar # 1139-144. This bar has the largest diameter at 1-3/4 inches and comes with steel and polyurethane bushings. This bar will not only outperform the stock bars on RVs but will also last longer. Check to ensure there is enough factory u-bolt available to accommodate the factory nut, washer and 1/2" plate. If the u-bolts are not long enough, the # RM-590050-00 u-bolt replacement kit...
    view full answer...
  • Diameter of the Rear Sway Bar by Roadmaster part # 1139-144
    The Roadmaster Rear Anti-Sway Bar # 1139-144 that you referenced is a 1-3/4 inch thick anti-sway bar. I confirmed this with Roadmaster. To determine if you will need the u-bolt kit # RM-590050-00 you will need to check out the current u-bolts your rear suspension is using. Basically if the u-bolt has enough threads above the nut to accommodate an additional 1/2 inch thick plate being attached to it you would not need the kit. If there's not enough threads on the u-bolt to accommodate an...
    view full answer...
  • Recommended Anti-Sway Bar for 2017 Tiffin Allegro 34PA on F-53 Chassis
    A rear anti-sway bar is going to give you the most improvement. From my research, it looks like your 2017 Tiffin Allegro was built on a Ford F-53 chassis. The Roadmaster Rear Anti-Sway Bar - Ford F-53, # 1139-144 is made to fit V-10-equipped F-53 class A motor homes 34 feet or longer. This kit is designed to support the factory anti-sway bar and improve the overall stability of your vehicle. Longer U-bolts are available if needed, part # RM-590050-00. You also have the option of using...
    view full answer...
  • Front and Rear Anti-Sway Bars for 2018 Thor Miramar 34.2 on Ford F-53 V10 Chassis
    The Thor Miramar 34.2 motor coach is based on the Ford F-53 with 6.8L Triton V10. For this coach you can use Roadmaster front sway bar # RM-1139-148 and rear sway bar # RM-1139-149. For the rear sway bar kit # RM-1139-149 you will need the longer u-bolt kit # RM-590050-00 if the factory bolts do not have enough space remaining to fit the factory nut, washer and 1/2-inch plate.
    view full answer...
  • Front and Rear Sway Bar Recommendations for a 2018 Forest River FR3 30DS with an F-53 Chassis
    For the front anti-sway bar on your 2018 Forest River FR3 30DS with an F-53 chassis you need the Roadmaster part # RM-1139-140. The rear anti-sway bar is the Roadmaster part # RM-1139-149. You do need to check to ensure there is enough factory u-bolt available to accommodate the factory nut, washer and 1/2" plate. If the u-bolts are not long enough then the Extended U-Bolt Kit # RM-590050-00 is needed. If you don't have at least 3 threads showing on your factory u-bolts after adding a...
    view full answer...
  • Are Longer U-Bolts Needed for Anti-Sway Bar on 2019 Forest River Georgetown GT5 Motorhome
    Since the U-bolts on your 2019 Forest River Georgetown GT5 motorhome have 1-1/2" exposed thread, it is very unlikely you will need the longer 15-7/8" square U-bolts # RM-590050-00 or 20-1/4" long round U-Bolts # RM-590050-10 to install the Roadmaster Rear Anti-Sway Bar # RM-1139-149. The plate is 1/2" thick (see accopmanying photo) so you will still have an inch of exposed thread, and worst-case scenario is you can order the longer U-bolts if need be, though I am confident you will not...
    view full answer...
    Image 1 for
  • Recommended Rear Sway Bar For A 2005 Monaco Monarch On A Ford F53 Chassis
    Though we cannot see your cart, I can definitely tell you that if you are getting a lot of issues with sway and or body roll, I recommend going with the Roadmaster Rear Anti-Sway Bar # 1139-144. This is 1-3/4" thick 4140 chromoly steel for superior strength that will do a much better job than stock bars. With that said, this actually will not replace the original sway bar and you will keep that installed. So if your older bushings are looking a bit worse for wear, I do recommend getting...
    view full answer...
  • Recommended Rear Anti-Sway Bar For 2005 Fleetwood Southwind 32V Built On Ford F-53 Chassis
    Since your 2005 Fleetwood Southwind 32V is built on the Ford F-53 Chassis and is under 34' long you will need the Roadmaster Rear Anti-Sway Bar # RM-1139-143. It is possible that your factory U-bolts will not be long enough, if they are not you will need the # RM-590050-10 if you have round U-bolts or # RM-590050-00 if you have square U-bolts. You may also be interested in the Front Anti-Sway Bar # RM-1139-148, and Steering Stabilizer # RM-RBK22-RSSA to complete your suspension enhancement...
    view full answer...


< Previous



Do you have a question about this Accessories and Part?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality accessories and parts for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate accessories and part information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Adam R
Expert Research:
Adam R
Employee Andrew K
Video by:
Andrew K
Employee Lindsey S
Written by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Dustin K
Video Edited:
Dustin K
Employee Wilson B
Updated by:
Wilson B
Employee Jenny M
Updated by:
Jenny M
Employee Shane H
Test Fit:
Shane H

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.