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Extended Round U-Bolt Kit for Roadmaster Anti-Sway Bars

Extended Round U-Bolt Kit for Roadmaster Anti-Sway Bars

Item # RM-590050-10
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Use these 20-1/4" long U-bolts to install your Roadmaster anti-sway bar. The extended-length bolts are designed to replace your vehicle's round OEM U-bolts if they are too short. 1-800-940-8924 to order Roadmaster accessories and parts part number RM-590050-10 or order online at etrailer.com. Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Extended Round U-Bolt Kit for Roadmaster Anti-Sway Bars. Accessories and Parts reviews from real customers.
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  • Reviews (12)
  • Q & A (0)
  • Videos (1)
  • Photos

Roadmaster Accessories and Parts - RM-590050-10

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

Use these 20-1/4" long U-bolts to install your Roadmaster anti-sway bar. The extended-length bolts are designed to replace your vehicle's round OEM U-bolts if they are too short.


Features:

  • U-bolts replace round 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
  • Dimensions: 20-1/4" long x 4-1/16" wide x 7/8" diameter
  • 4 Round U-bolts with nuts and washers included
  • Made in the USA
  • Limited Lifetime Warranty


590050-10 Roadmaster Anti-Sway Bar Extra Long Round U-Bolt Kit





Video of Extended Round U-Bolt Kit for Roadmaster Anti-Sway Bars

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-590050-10 Review

Speaker 1: Today we're going to take a look at the extended round U-bolt kit for the Roadmaster anti-sway bars.Now, these 20 and a quarter inch long U-bolts are used to install your Roadmaster anti-sway bars to your vehicle.Now, the Roadmaster anti-sway bar's part number RM-1139-143, RM-1139-144, and RM-1139-149 are all used in conjunction with your vehicle's factory bar and it mounts using the factory U-bolts but some of the vehicles that those sway bars are used on may require these extended U-bolts.Basically, these extended length U-bolts are designed to replace your vehicle's round factory U-bolts if they're too sharp. The nuts and washers are included. They are made in the USA. The usable length on this, which is going to be on the inside from the very end here up to the top here. And I got to see inside measurement usable length is 20 and quarter inches. The thread length, in other words it's threaded from this end right up to here, so the length on the thread is going to be five inches.

And then the inside width, which is measured inside to inside is right at four and a quarter inches.

Customer Satisfaction Score:


Customer Reviews

Extended Round U-Bolt Kit for Roadmaster Anti-Sway Bars - RM-590050-10

Average Customer Rating:  5.0 out of 5 stars   (12 Customer Reviews)

Use these 20-1/4" long U-bolts to install your Roadmaster anti-sway bar. The extended-length bolts are designed to replace your vehicle's round OEM U-bolts if they are too short.

by:

We took our first trip with these installed over the last two months (April & May 2021 4,000 miles). All three of these were put on at the same time front & rear anti sway bars with the extended length U-bolts. The RV handled great.



by:

easy to in stall on my RV for the roadmaster sway bar.... Cathy T at trailer is the best on line Rep there is at E trailer .... she helped me get this product and it fit my rig ... I have a 2018 holiday rambler and i added an additional sway bar on the rear ... had to have this product to do it

John A



by:

Will definitely need them if you install the road master rear sway bar. Mine needed them with the 24000 GVW.



by:

These did exactly what I needed them to do. Removed the old U-bolts and used these to extend the length so I could install the sway bar on my 2018 34PA Tiffin Open Road



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!!



by:

Worked OK, I guess. Installer didn't say he had a problem installing them.



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!!



by:

Easy installation!



by:

Product was exactly what I needed. Came on time

Henry

10/29/2019

Awesome best thing I ever bought for motorhome



by:

Talked to Jesse Friday Afternoon and had the parts in my hands Monday Afternoon.
Thank You for the Great Service.



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See what our Experts say about this Roadmaster Accessories and Parts

  • How to Determine If Longer U-Bolt Kit is Needed for Roadmaster RM-1139-149 Anti-Sway Bar Kit
    You can easily determine if you'll need the # RM-590050-10 Extended U-bolt kit by taking a quick measurement. Measure the length of the existing U-bolt that extends through the factory nut. If you can add a 1/2 inch to account for the thickness of the plate used to attach the new anti-sway bar and have 3 threads remaining, you won't need the kit. Otherwise, you will. Since you currently have a 1/2 inch of thread exposed, I'm afraid you're going to come up short on the U-bolt length and...
    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...
  • 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 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...
  • 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
  • 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...
  • 1998 Ford Transit Motorhome Rear Sway Bar Recommendation
    We do! According to my research your 1998 Ford Transit Motorhome is built on an F-53 chassis so as long as it has a 15,700 lb GVWR I recommend using the 1-1/2" Diameter Roadmaster Rear Anti-Sway Bar # RM-1139-143. Please note that you may also need the long U-Bolt kit as well. For 15-7/8" Square Bolts you need part # RM-590050-00 and then for 20-1/4" Round Bolts you need part # RM-590050-10.
    view full answer...
  • Tools Needed to Install Roadmaster Rear Anti-Sway Bar # RM-1139-149
    The installation manual for the Roadmaster Rear Anti-Sway Bar # RM-1139-149 along with the Extended U-Bolt Kit # RM-590050-10 simply calls for a torque wrench and "general hand tools". When we installed this kit on the 2017 Ford F-53 we used a 13/16 inch socket, a 5/16 inch socket, a 15/16 inch wrench/socket, an 18mm wrench/socket, and a 16mm socket. I have attached this installation video below that you can also check out.
    view full answer...
  • Anti-Sway Bars for a 2008 Thor Hurricane 34Y w/ Garage
    For your 2008 Thor Hurricane 34Y with garage you can use the below anit-sway bars: Front - Roadmaster Front Anti-Sway Bar # RM-1139-148 Rear - Roadmaster Rear Anti-Sway Bar # RM-1139-149 This kit uses a flat plate that is held in place by the leaf spring U-bolts on the rear axle. Check to ensure there is enough exposed U-bolt below the nut to accommodate the factory nut and washer once the 1/2-inch thick plate is installed above them. If you do not have enough exposed U-bolt, order one...
    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...
  • 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...
  • 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-1139-148. 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...
  • Sway Bars and Steering Stabilizer For With a 2023 Fleetwood Flair 29M On Ford F53 V8 18,000LB GVWR
    As your 2023 Fleetwood Flair is on a Ford F53 V8 18,000LB GVWR chassis you have 2 choices for the rear sway bar. The Roadmaster Rear Anti-Sway Bar # RM-1139-149 is 1-5/8" in diameter and mounts in addition to the factory sway bar. They also offer the 1-3/4" Rear Sway Bar # RM25VR. This will also mount in addition to the factory sway bar but is slightly stronger being larger in diameter than the 1-5/8" sway bar. You may need the Extended Square # RM-590050-00 or Round # RM-590050-10 U-Bolts...
    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
  • 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-1139-148 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...
  • Is the Extended Round U-Bolt Kit Needed when Installing the Rear Anti-Sway Bar on a 2015 Ford F53
    When installing the Roadmaster Front Anti-Sway Bar for Motor Homes # RM-1139-148 and the Roadmaster Rear Anti-Sway Bar for Motor Homes # RM-1139-149 on your 2015 Newmar Canyon Star Toy Hauler there are a few things you will want to look for. When I spoke with my contact at Roadmaster he said that you will want to make sure that you have at least 3 threads showing on the U-bolts after installing the rear anti-sway bar. Since you only have half an inch that you can see you will want to go...
    view full answer...
    Image 1 for
  • Steering Stabilizer and Anti-Sway Bars for 2015 Tiffin Open Road 32CA Motorhome on Ford F-53 Chassis
    According to my research, the 2015 Tiffin Open Road 32CA has a GVWR of 22.000 lbs, which means that you'll need the following parts: Steering Stabilizer, part # RM-RBK22-RSSA Front anti-Sway Bar, part # RM-1139-148 Rear Anti-Sway Bar, part # RM-1139-149 For the rear anti-sway bar, you might need to replace the OE U-bolts if they aren't long enough. The installation involves adding the Roadmaster Anti-Sway to the existing one. The mounting plate for the Anti-Sway bar is 1/2 inch thick,...
    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 # RM33RR to complete your suspension enhancement and...
    view full answer...
  • Recommended Sway Bars For a 2011 Tiffin Allegro RV Motorhome On a Ford F-53 22,000LB Chassis
    I recommend the Roadmaster Front Anti-Sway Bar # RM-1139-148 for the front of your 2011 Tiffin Allegro on the Ford F-53 22,000lb chassis. This will replace your current way bar with a thicker and stronger 1-3/4" sway bar and uses polyurethane bushings versus rubber. For the rear the Roadmaster Rear Anti-Sway Bar # RM25VR will add a 2nd sway bar to the rear of your chassis. This bar is also 1-3/4" in diameter like the front with polyurethane bushings. You will need to measure the the amount...
    view full answer...
  • 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 Anti-Sway Bars for 2005 Fleetwood Bounder 34F
    For your 2005 Fleetwood Bounder 34F, I recommend replacing the rear sway bar first. The rear needs more stability than the front based on the axle placement and weight so it will make the greater impact. I recommend the Roadmaster Rear Anti-Sway Bar # 1139-144. This retains the factory sway bar. The factory u-bolt may not be long enough for the factory nut, washer and 1/2" plate. If not, square top u-bolts will need # RM-590050-00, and round top u-bolts will need # RM-590050-10. To...
    view full answer...
  • How To Increase Stability and Reduce Sway Of 2020 Bounder Motorhome on 2019 Ford F-53 Chassis
    It sounds like you meant that the Fleetwood Bounder is on a 2019 Ford F-53 chassis which is very common. The first step in increasing the stability of the 2020 Fleetwood Bounder on the 2019 Ford F-53 chassis is to replace the factory sway bars. The factory sway bars, especially on the Ford Chassis are not as good as the aftermarket sway bars at keeping the motor home in line. I recommend Roadmaster Front Anti-Sway bar part # RM-1139-148 and Rear anti-sway bar part # RM-1139-149. Before...
    view full answer...
  • Rear Anti-Sway Bar for 2017 Thor Motor Coach Hurricane 31S With 2016 Ford F53 Chassis
    Yes, the Roadmaster Rear Anti-Sway Bar for Motor Homes, # RM-1139-146 will work on your 2017 Hurricane 31S with the 2016 Ford F53 Chassis with either a V8 or a V10. The anti-sway bar will use the weight of the axle as a brace against the chassis so that pressure to one side of the motor home is countered by the sway bar. It minimizes the side-to-side movement that cargo shift, wind or passing trucks can cause. On some applications longer u-bolts are required to install this kit. For square-end...
    view full answer...
  • Rear Anti-Sway Bar Options for a 2023 Jayco Precept Motorhome with F-53 Chassis
    The Hellwig Rear Anti-Sway Bars # HE42GR and # HE72GR you're looking at are for various Land Cruiser models. Currently (as of September 2023) it doesn't look like Hellwig has any anti-sway bars for your 2023 Jayco Precept Motorhome with the F-53 chassis, but we do have some options from Roadmaster: - 1-3/4" Diameter # RM25VR - 1-5/8" Diameter # RM-1139-149 Please note the 1/2" plate installs with the factory U-Bolts. If your current U-Bolts can't accommodate the thicker 1/2" plate then...
    view full answer...


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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jeff D
Installed by:
Jeff D
Employee Wilson B
Written by:
Wilson B

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