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  1. Anti-Sway Bars
  2. Roadmaster
  3. Anti-Sway Bar
  4. Front
  5. 2-1/8 Inch Diameter
  6. Mounting Hardware Included
THIS ITEM IS NOT A FIT FOR
2017 Ram 2500
Roadmaster

Roadmaster Front Anti-Sway Bar - 2-1/8" Diameter

Part Number: RM72MR
In Stock
$1,420.00
Retail:$1,575.63
You Save: $155.63
Anti-Sway Bars
Not Confirmed to Fit

2017 Ram 2500

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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 RM72MR or order online at etrailer.com. Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Roadmaster Front Anti-Sway Bar - 2-1/8" Diameter. Anti-Sway Bars reviews from real customers.
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Roadmaster Anti-Sway Bars - RM72MR

Highlights

  • Custom Fit for Your Vehicle: Tuned to your suspension for better control and stability.
  • Reduces Sway: 2-1/8" 4140 chromoly steel bar minimizes side-to-side roll for steadier control.
  • Handles Crosswinds: Balances weight transfer to stay level through gusts and passing traffic.
  • Less Driver Fatigue: Cuts steering effort so long drives feel smoother and more relaxed.
  • Improves Cornering: Keeps the vehicle level in turns and on uneven roads for predictable handling.
  • Uses Existing Connections: Mounts to front axle and chassis with included hardware, no drilling needed.
Made in USA

Features to know about

Tighter, More Confident Handling: 2-1/8" Front Anti-Sway Bar Reduces Body Roll

When your front end leans hard through corners or drifts in crosswinds, it’s a sign the stock setup is flexing too much. The 2-1/8" diameter bar ties the front axle to the chassis so both sides of the suspension work together. The result is noticeably tighter handling and a level ride through sharp turns, uneven pavement, and gusty conditions. You’ll feel more confident keeping your line without constant steering corrections.

Less Fatigue on Long Drives: Stable, Predictable Road Feel

Hours of steering corrections on windy highways can wear you out fast. This system minimizes side-to-side movement so the vehicle tracks straight and steady, even when big rigs blow past or the road starts to twist. With less sway and less effort at the wheel, you stay relaxed and alert for longer stretches behind the wheel.

Built to Last: 4140 Chromoly Steel and Polyurethane Bushings

This bar is made from 4140 chromoly steel—a chromium and molybdenum alloy that’s much stronger than typical 1020 steel. The extra hardness and large diameter add torsional stiffness, making it nearly 30 percent better at resisting sway. Polyurethane bushings replace standard rubber to resist oil, gasoline, and ozone, keeping their shape so support stays consistent over time.

Close-up view of Roadmaster Anti-Sway Bar polyurethane bushings and grommets showing durable construction and flexible mounting design.

Straightforward Install: Heavy-Gauge Hardware and No Drilling Required

Mounts to the front axle and chassis using the included heavy-gauge hardware and factory end links—no drilling needed. The kit includes two 5/8" shackle bolts for the end links and bushing lubricant for easy assembly. Once in place, it’s ready to work alongside other suspension upgrades without interference.

Installed Roadmaster Front Anti-Sway Bar mounted on vehicle front axle and frame, showing thick chromoly steel construction and mounting hardware.

Specs

Dimensions

  • Bar diameter: 2-1/8"

Warranty

  • Limited lifetime warranty

1139-218 Road Master Anti-Sway Bar - Front

Installation Details RM72MR Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.8

2473 reviews
5 Stars
(2122)
4 Stars
(243)
3 Stars
(45)
2 Stars
(21)
1 Star
(42)
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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.

by:

The product is great! All the other positive reviews of the product are accurate. However, the instructions were not for my vehicle and required a phone call for clarification. Waited about 10 mins on hold to talk to someone but this was on a Sunday so I was surprised that anyone answered. Good job on that. I purchased this item because the ad said no drilling. Step 3 in the instructions was to drill. I passed this on to the folks at etrailer and they agreed this was incorrect and offered a free return to correct the issue. As of 23 May 26 the ad has not been corrected so beware. I needed the item so it went from something I was going to install to something I needed to get installed. Finding an installer for an aftermarket part that requires drilling into your vehicle and wasn't sold by the installer was far more difficult than I thought it would be. Thankfully the guys at my local Air Force base auto hobby shop were up for the task and did a great job. Of course there is additional cost. 3 x $40 an hr for my time trying to install myself, reinstalling original gear, finding an installer and logistics of getting vehicle to and from shop. People dont generally value there time accurately. If you had to take time off work 1hr x $40 which I did should also be calculated. With the installer fees this amounted to an additional $380. That's additional cost to me because of a poorly advertised item. This is the part that bugs me about etrailer. They were very friendly on the phone and tried to be helpful with the instructions but other than returning the item, didn't offer a discount for the added frustration or even a coupon for a future purchase. This of course is not required of them but for a purchase as expensive as this you might think this would be a no brainer. I think they could do better.



by:

As others have said the sway bar is good but the directions could be improved. Removing the old down link on the drivers side is a bit of a challenge as you can't easily remove the old bracket until you remove the downlink. Unfortunately you can't get the bolt holding the link to the bracket without supporting the fuel tank and removing the rear strap so that you can push the tank over far enough to get the bolt out. Another issue was the old U brackets holding up the old sway bar were on 3" centers where the new bracket is on 2 3/4" centers. This looks like an insurmountable problem until you remove the star washers holding the old bolts where you can see there is a slot which allows you to use the bolts included. The old bolts were both attached to a plate which kept made the center distance between the bolts non adjustable so using the old bolts is not an option. On the passenger side the plate holding the 2 bolts was connected to the axle connection for the height sensing proportioning valve. I removed the 3 bolts holding it, took out the plate and cut off the front most bolt and reinstalled the plate. Fortunately that allowed me to use the old bolt in the plate and for the front most bolt I used one from the kit and achieved the 2 3/4" center spacing needed for the new bracket. All of this would be nice to know when you tackle this job. Fortunately I had all the tools needed to complete the job. I found it easy to install the new bar despite its weight by lifting up one end of the sway bar and loosely attaching it to the the down link. I then did the other side and once both ends were attached I put the center of the bar on my hydraulic jack and lifted it into place. This made it a fairly easy job to position and attach the U brackets to the axle despite the heavy weight of the bar. A video of this process on an older (1998 vintage) Dodge Ram 2500 would be a big help.



by:

We were told this sway bar might not work on our Dodge Ram3500 dually. Let me tell you this worked great. Our truck has a camper on top and we took this on a long trip and it worked great. What a difference it made. This trip had lots of very high winds. We could easily tell the difference from before the sway bar and after. Thanks



by:

1 of the best purchased I've made for my Fleetwood Discovery. All wandering is now gone. Took an afternoon to install (I'm a retired mechanic) and am very pleased with the outcome. I also purchased an Steering Stabilizer Shock a year before and I improved wandering maybe %25. Both purchases arrived (in Alaska) promptly and in good condition. I Will purchase from eTrailer.com again when needed.



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I love this sway bar, and love the service and overall experience with etrailer. My F350 came with factory sway bars front and rear, and I'd replaced the rear bar several years ago, and was impressed with the difference it made. So, more recently I ordered the front bar to replace the smaller factory unit, and it again made a wonderful change for the better. Our Bigfoot truck camper is tall and heavy, but our rig handles wonderfully and has essentially no sway or rock in traffic or on bumpy roads. I highly recommend this sway bar.



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After a year of usage, I couldn't be happier with the Roadmaster front and rear anti-sway bar kits. The rear kit for my W22 chassy, the mounting hardward would not fit properly. I call Roadmaster directly and they custom built the mounts, painted, and shipped within days.



by:

Grate stuff. Easy to bolt up and figure out. Drive quality improved dramatically and less sway with trailers.
Just in the kit with the grease and red lock tight the hardware washers were one size to large so I got the right ones and installed all is well.



by:

Easy installation ,done by myself laying on my back in the driveway only took about 1 1/2 hours to do. I have a lift but didn't use it and I think it was easier on the ground for just one person. Sway bar made a big difference in the drivability of my 2003 E350 pleasure way class B
I'll upgrade the front factory bar to the HD Roadmaster bar soon
If you have issues with the handling of your Ford pleasure way start with this sway bar



by:

This is a must have for your Motorhome. What a difference in the ride of the coach through the highway washes, the side winds and the side drift of the big rigs. This bar reduces the coach movement by as much as 80% I would say. The installation is easy for someone who is mechanically inclined and still doable for DYIer as long as you have the tools ( standard 1/2” drive tool set, low speed high torque drill for the holes in the frame and a 250 plus ftlbs torque wrench). I would highly recommend this Anti-Sway Bar.



by:

a quick fix it to install sway bars front and rear.
I did this and just came home from 2400 mile trip.
installed rear only before we left, then at our destination installed front.
the drive back it handles wayyy better and it sits level now.
""your results may very-use at your own risk. ""
from etrailer.com
rear = RoadMaster 1259-109.
front = RoadMaster RM-1259-105 with RM-590063-00 bracket kit.
i'm sure over time they will flex and stress and start to lien again.
But for now it looks much happier. ( and level )
and i'm very happier with performance and drivability
Seems the big bars help distribute the load to both sides,
you can drive it with one hand now.
and when a truck passes, it's very manageable.
( this could be part the tires on it )
these can be installed in about 6 hours pretty easy.
The hardest thing is drilling the 8 holes in frame. ( 4 front 4 rear. )
We had to shift 2 brake lines over via and small bracket and covers lines with old fuel like to act as wear buffer.



by:

Great instructions and nice, high quality fasteners.
Fitment was great and only minor adjustments to my Air lift air bags was needed.
I have a 2013 Ram 3500 Dually with:
-Torklift 30K hitch
-5” Exhaust
-Air lift 7500XL air bags.
The lower brackets for the air bags needed to be moved slightly and I had to cut the excess bolt off on the passenger side.



by:

Received the product in a timely manner. The shipping company used I’d give a no star rating. I received the anti-sway bar bare out of a box or wrapper with the installation part box and a cut out piece of cardboard with the shipping label on it taped to the bare bar with about five yards of packing tape. The bar was scuffed, scratched and chipped with the RoadMaster label destroyed. I realize it’s going to be installed under the front of my motorhome but as much as it costed I would like to be the one to scratch and scuff it. If I was a company installing this on a customers vehicle I’d return it. I do not believe it was shipped from etrailer in this condition.



by:

Great buying experience with ETrailer. Fast shipping and quality constructed part. Noticeable difference in controlling body sway. Very pleased with the bar and highly recommend Etrailer.



by:

I have carried a truck camper for 7 years with just Timbrin blocks also from Etrailer and finally made the move to Roadmaster anti sway bars front and rear. Planning a trip to the west coast from Georgia next year and wanted all the help I can get for stability on the mountain roads. Have yet to test but Im sure it will be a noticeable improvement. When my wife takes the wheel so I can have a break she would see-saw the steering wheel to balance the load and it drove me insane. Hoping for relief for both of us.



by:

RM-1109-121 Rear Sway bar for 85 Chevyvan G30 RV. Install was pretty straightforward. I would mount the brackets to the frame first and then the sway bar to the axle. It’s easier to drill the holes without the sway bar getting in the way.
Before I replaced the shocks and upgraded the from sway bar and added the rear sway bar my G30 Chevyvan Winnebago was a wallow wagon. It took 110% focus to drive. Now it drives like a regular vehicle. Smooth. No leaning over when cornering. It’s night and day.



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This is a great company to do business with.
Thanksagain



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Looks good have not installed yet



by:

What an unbelievable difference on my Fleetwood Class A Motorhome. Paired it with a new Rear anti sway bar and 4 new Koni EVO shocks. The handleing and steering are much improved and no more tail wagging in heavy winds, much more enjoyable to drive and no driver fatigue after long driving days.


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See what our Experts say about this Roadmaster Anti-Sway Bars

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    Hey Rick, thanks for reaching out. I can help with that. Your 2025 Fleetwood Bounder is on a Ford F-53 chassis, and we have both front and rear sway bars for that. Here are the exact parts numbers: - Roadmaster Front Anti-Sway Bar - 2-1/8" Diameter # RM72MR - Roadmaster Rear Anti-Sway Bar - 1-3/4" Diameter # RM25VR Both of these will fit models with GVWRs between 16K and 26K. Both are no drill install. For the rear bar, it installs using the factory U-bolts and, in some cases, they aren't...
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  • Looking For Sway Bar For 2025 Entegra 29S Class A/Ford F-53 Motorhome
    Hey Thomas, thanks for reaching out. We do have both front and rear sway bars for your 2025 Entegra 29s. I wish I could throw you multiple options, but we actually have only one fit for each. Here are the exact part numbers: - Roadmaster Front Anti-Sway Bar - 2-1/8" Diameter # RM72MR - Roadmaster Rear Anti-Sway Bar - 1-3/4" Diameter # RM25VR The Roadmaster sway bars are extremely solid aftermarket options. Adding one (or both) will make a noticeable difference in control and stability...
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    Thanks for reaching out, Gregory! You're on the right track with the Reflex Stabilizer # RM62VR you installed. The next things to upgrade would be your front and rear anti-sway bars, and then from there you'll want to look at suspension enhancement if you're still needing some help. Here are the parts I recommend installing, and in this order: - Rear Anti-Sway Bar # RM-1139-149 - Front Anti-Sway Bar # RM72MR - Suspension Enhancement # TFRF53A Motorhome factory anti-sway bars tend...
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  • Front and Rear Anti-Sway Bars for 2024 Entegra Vision 29F
    Hey Nathan! You already had the right idea since your 2024 Entegra Vision 29F is built on the F-53 chassis. Also, thanks for providing your 18k GVWR. Based on those two pieces of information you need the following: -Roadmaster Rear Anti-Sway Bar # RM-1139-149 -Roadmaster Front Anti-Sway Bar # RM72MR Adding the front and rear is a really great choice. You're going to be making a significant upgrade to your ride quality and overall experience. If you decide you want to add in a steering...
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    For a 2024 Entegra Vision 27A with a V8 engine and F53 chassis you'll need the Roadmaster Exact Center Steering Stabilizer w/ Custom Brackets for Class A Motorhomes # RM63RR. I've attached one of my installation videos below to help walk you through the process if you choose to do it yourself. You can also improve your motorhome's handling by adding or upgrading the front and rear anti-sway bars. For the rear you'll need the Roadmaster Rear Anti-Sway Bar # RM25VR (1-3/4" diameter). For...
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    I have a better solution for you as the Timbren Front # TFFF53B and Rear # TFRF53A will create a very stiff ride for your 2023 Entragra Vision 29S. I feel their jounce springs are great for commercial applications and extreme weights but with the delicate trims and construction of your cabinetry the SumoSprings Front # SSF-170-40-2 and Rear # SSR-184-40-1 are going to be a much better option. These are constructed of a microcellular urethane which is much better at absorbing shock and will...
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  • Recommended Anti-Sway Bars for a 2022 Coachmen Pursuit 27XPS
    I checked with Coachmen and the 2022 Coachmen Pursuit 27XPS is actually built on a Class A V8 Ford F-53 Chassis which we do offer front and rear anti-sway bars for. For this, I recommend the Roadmaster Front Anti-Sway Bar part # RM72MR and Roadmaster Rear Anti-Sway Bar part # RM-1139-149. These will both do an excellent job of helping reduce body roll and the subsequent sway caused from this. I also recommend adding the Roadmaster Exact Center Steering Stabilizer part # RM63RR which will...
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    For your 2023 Coachmen Pursuit 31BH you will need the Front SumoSprings Rebel Custom Helper Springs # SSF-170-40-2 and Rear SumoSprings Maxim Custom Helper Springs # SSR-184-40-1. If you were to select only one to install first I recommend the rear springs since that is where the majority of your weight sits and they will help to reduce the amount of body roll you feel. If you are looking to get the best ride quality I have seen dramatic increases by adding both the SumoSprings above...
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  • Sway Bars For a 2021 Thor Ace RV Motorhome On 2020 Ford F-53 22,000LB Chassis
    Yes, the Roadmaster Rear Anti-Sway Bar # RM-1139-149 is the correct rear sway bar for your 2021 Thor Ace motorhome on a 2020 Ford F-53 22,000lb chassis. This adds a 2nd sway bar to the rear of your chassis. The Roadmaster Front Anti-Sway Bar # RM72MR will replace your front sway bar with a stronger unit.
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  • Recommended Suspension Enhancements For A 2023 Holiday Rambler Class A Motorhome
    Steering stabilizers as well as Anti-Sway bars from Roadmaster are definitely going to be a major help with keep your motorhome tracking straight and reducing driver fatigue, but another very popular choice to improve ride quality is to install SumoSprings. Depending on the GVWR of your 2023 Holiday Rambler you'll need to use different kits for the front and rear axles: 16K-18K: Front # SSF-170-40-2 Rear # SSR-183-54-1 20K-22K: Front # SSF-170-40-2 Rear # SSR-180-54-1 24K-26K: Front...
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  • Does The Roadmaster Front Anti-Sway Bar # RM72MR Come With All Necessary Hardware
    The Roadmaster Front Anti-Sway Bar # RM72MR is only going to come with two 5/8" shackle bolts for the end links and would require you to reuse the factory M14 bolts and clamps that should've been on your motorhome. If they truly are not there you would need to get in contact with REV Group, Inc. (the manufacturer) to determine what the length of the 5/8" bolts need to be or you could get some that are a few inches in length and cut them down as needed and get the some locking flange nuts...
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  • Recommended Anti-Sway Bars for a 2024 Winnebago Vista 29 on a F-53 Chassis
    If you already have a front sway bar installed I would add a rear one and go from there. The 1-5/8" Diameter Roadmaster Rear Anti-Sway Bar item # RM-1139-149 would be the best option and is the largest one we have. I don't have anyway of knowing how thick your front sway bar is but our option is the 2-1/8" diameter Roadmaster item # RM72MR. If you don't notice a big improvement adding the rear one and your front sway bar isn't this thick I would upgrade it.
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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee John S
Video Edited:
John S
Employee Wilson B
Updated by:
Wilson B
Employee Kevin C
Test Fit:
Kevin C
Employee Thomas T
Video by:
Thomas T
Employee Sabrina W
Written by:
Sabrina W

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