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  1. Anti-Sway Bars
  2. Roadmaster
  3. Steering Stabilizer
  4. Includes Mounting Hardware
Roadmaster Exact Center Steering Stabilizer w/ Custom Brackets for Class A Motorhomes

Roadmaster Exact Center Steering Stabilizer w/ Custom Brackets for Class A Motorhomes

Item # RM42RR
Our Price: $635.00
Anti-Sway Bars

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Shipping Weight: 9 lbs
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This gas spring steering stabilizer will give your motorhome a responsive steering experience that keeps your rig from wandering. Custom mounting brackets included. 1-800-940-8924 to order Roadmaster anti-sway bars part number RM42RR or order online at Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Roadmaster Exact Center Steering Stabilizer w/ Custom Brackets for Class A Motorhomes. Anti-Sway Bars reviews from real customers.
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  • Reviews (147)
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Roadmaster Anti-Sway Bars - RM42RR

  • Steering Stabilizer
  • Roadmaster
  • Includes Mounting Hardware

This gas spring steering stabilizer will give your motorhome a responsive steering experience that keeps your rig from wandering. Custom mounting brackets included.


  • Stabilizer prevents your motorhome from wandering and improves steering
    • Keeps your RV centered, taking the fight out of steering
    • Helps maintain control of your RV during crosswinds, rut tracking, and road edging
  • Nitrogen-charged tandem gas spring applies full force right when you need it
    • Prevents unwanted movement rather than just correcting it after it's begun
  • No drilling or welding needed for installation
    • Uses factory axle bracket holes on one end and tie rod location on the other
    • Includes custom mounting brackets
  • Heavy-duty, stainless steel construction
  • Made in the USA


  • Application: large Class As, Super Cs, and buses
  • Maximum GVWR: 24,000 lbs
  • Limited lifetime warranty


  • It's important that worn steering components are addressed before installing this kit.
  • If you have a lighter chassis but feel you're pushing the weight limit for a lower-rated steering stabilizer, this heavy-duty Exact Center will work for lighter applications.

Improve Your RV's Steering

The Exact Center works better than other steering stabilizers because it's always working to prevent unwanted movement.

Where other stabilizers react to movement, Exact Center works to prevent it

Other steering stabilizers slowly activate to control steering only after your motorhome has already begun to wander or make a turn. Basically, other steering stabilizers are reactive - they fight against the unwanted movement, but only after the movement has already started. They will get your RV back in line and absorb shock while doing so, but they still allow some play in the steering because of their soft centers, which can cause the steering to feel spongy.

Exact Center uses a nitrogen-charged tandem gas spring to apply force right when you need it

Roadmaster's Exact Center is proactive. It uses a nitrogen-charged gas spring that applies full force right when you need it. This helps prevent the unwanted wandering and white-knuckling you typically get when driving your RV. The improved responsiveness makes driving to your next adventure less of an exhausting chore.

481300A Roadmaster Exact Center Steering Stabilizer

RBK22 Custom Mounting Brackets for Roadmaster Steering Stabilizer

Installation Details RM42RR Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Roadmaster Exact Center Steering Stabilizer w/ Custom Brackets for Class A Motorhomes - RM42RR

Average Customer Rating:  4.6 out of 5 stars   (147 Customer Reviews)

This gas spring steering stabilizer will give your motorhome a responsive steering experience that keeps your rig from wandering. Custom mounting brackets included.


Helped tremendously with the push you get when a tractor trailer passes by. It helped my wife relax while traveling .

2001 Ford F-53

Can't wait to get on the road and try it out. After installing this now I understand the whole theory of how this stabilizer will improve the driving experience. I also noticed during installation the previous owner of the coach must have had one installed as well due to the nuts on the leaf springs showing evidence of being removed recently. I did have to grind off the corner of the black bracket that comes with the kit and give it a bigger radius as the axle was flat in that corner. See picture for a better understanding.Just a 5 min setback so nothing difficult. Will come back and update after a test drive.2001 Fleetwood Southwind 37U on a F53 chassis.


Product seems to be of god quality. Issue with the instructions is that although the product has been upgraded the instructions to include all photos are for the previous product. Additionally the video recommends using an impact tool for removing and installing but the fine print on the instructions say using an impact tool may violate the warranty as it can strip the bolts. Took me a few times watching the video before I was comfortable completing the installation but the product appears to work well on the highway but actually makes steering more difficult on winding mountain roads. As usual with RV it’s impossible to find specs for equipment so I never could find the torque value to retorque the nuts I removed so I torqued the as tight as I could without breaking and will just have to inspect them after my next trip. Getting ready for a 1000 mile round trip in a weekend and anxious to see how well the product works.

2014 Ford F-53

Tips for installation;
1) Drive and
find straight/center with masking tape as described; DO NOT SKIP THIS STEP or rely on if the wheels just look straight.
2) Wire brush (with drill attachment) U-bolts to remove rust.
3) Spray with PB Rust breaker type product and let soak on U-bolts
4) Remove U-bolts with torque wrench to help determine torque setting
5) Follow remainder of etrailer video instructions as they are clear and correct EXCEPT; the black end pieces in which the shock screws into should be set to a thread depth you are comfortable with prior to install to leave room to perform fine adjustments. I reset bracket to make sure the threads had plenty of bite.

The hardest part is the fine tuning. I have only put approx. 10miles on it at this point searching for center as I did not do step #1 at first and had to reset the bracket on the drag-link to ensure proper thread depth.
As far as performance; Not sure how I feel about it yet. Does hold straight but requires more effort during turns and constant effort to maintain the turn. My rig takes a lot of mico adjustments on the steering wheel going down the road to keep straight and I am concerned this will cause more fatigue rather than less. Getting ready for road trip and will report more after.

As far as Etrailer; Excellent communication, quick shipping, good instructional video.


I had ordered and installed a Road Master reflex stabilizer. On the first trip itjamed and nearly caused me to wreck. Turns out it was nearly 12 inches short and would not allow my RV to turn properly. Sent that one back and purchased what an etrailer expert said was the correct one for my RV. Just in installed it and checked my steering radius which is now correct. The new one is the exact center model. Ca not wait to give it a test run. Waiting now for my spri g bumpers to also improve my steering and swaying
So far etrailer has been excellent to
do business with

2013 Ford F-53

This is an innovative design for me. I have always seen the steering stabilizer with spring. Looks like a great design.


Great service. Britney was very helpful in getting me exactly what I needed for my motor home!!!


Customer service was great & the order arrived very quickly

2013 Ford F-53

As always my order was packed very well and delivered in a timely manner. Thanks

2020 Ford F-53

every thing arrived on time and will be installing the items next week


Eazy to install with no problem.
I am
well satisfied

2008 Ford F-53

Was easy to install drives better but not perfect but it’s a nice product


Vary nice looking and high quailty.






2013 Ford F-53




For what this cost,I notice no difference in the steering handling from the prior factory set-up. My RV mechanic tells me it's because I have a shorter motor coach at 32 foot. It just gets blown around and handles like a a short wheel base vehicle.


Driving our 30 ft. Class C motor homes, is like driving a sports car, haven’t had steering problems with road ruts, no more white nuckle driving, sure help driving between big
rigs. I glad I waited on them during the Covid shortages instead of buying some other product. You need to put ty raps on the end of the boots that’s keeping it in place. Great investment.


I really like the way the vehicle handles after finally getting it centered. I had issues with the rubber boot constantly sliding off one side or the other. This would cause major vehicle pulling one way or the other especially after one heavy rain storm. I placed hose clamps on the boot and clamped it to the steering stabilizer, that fixed the issue.


Super easy install on a 2019 Leprechaun 319MB ,Class C RV. Hardest part was taking off the old hardware. Followed the instructions and test drove at 60mph and it drove totally straight and did not have to make any micro adjustments. A very well made product.

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee David F
Test Fit:
David F
Employee Ryan G
Test Fit:
Ryan G
Employee Kevin C
Test Fit:
Kevin C
Employee John A
Test Fit:
John A
Employee Schuyler H
Video by:
Schuyler H
Employee Ethan H
Video by:
Ethan H
Employee Sabrina W
Written by:
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