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  1. Tow Bar Braking Systems
  2. Roadmaster
  3. Brake Systems
  4. Air Brakes
  5. Air Over Hydraulic Brakes
  6. Proportional System
Roadmaster BrakeMaster Braking System for RVs w/ Air or Air Over Hydraulic Brakes - Proportional

Roadmaster BrakeMaster Braking System for RVs w/ Air or Air Over Hydraulic Brakes - Proportional

Item # RM-9100
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Our Price: $655.00
Tow Bar Braking Systems
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Shipping Weight: 8 lbs
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Product Expert Lindsey S

Is this right for you? Product Expert Lindsey S says:

Yes, if you:

  • Own a motorhome with air brakes or air-over-hydraulic brakes
  • Tow a nicer or newer car and want the most precise braking possible

No, if you:

  • Want a system that doesn't require any setup so you can hit the road faster
  • Intend to install yourself, but don’t have an advanced mechanical background
  • Hate having to buy add-ons, like the breakaway system, which is sold separately
This truly proportional supplemental braking system connects directly to your motor home's air brakes and applies the brakes in your towed car using the same force that you apply to the brakes in your RV. Lightweight actuator removes for storage. Lowest Prices for the best tow bar braking systems from Roadmaster. Roadmaster BrakeMaster Braking System for RVs w/ Air or Air Over Hydraulic Brakes - Proportional part number RM-9100 can be ordered online at etrailer.com or call 1-800-496-5010 for expert service.
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  • Reviews (86)
  • Q & A (0)
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  • Why etrailer?

Roadmaster Tow Bar Braking Systems - RM-9100

  • Brake Systems
  • Air Brakes
  • Air Over Hydraulic Brakes
  • Proportional System
  • Fixed System
  • Recurring Set-Up
  • Roadmaster
  • Not Power Assist Brake Compatible

This truly proportional supplemental braking system connects directly to your motor home's air brakes and applies the brakes in your towed car using the same force that you apply to the brakes in your RV. Lightweight actuator removes for storage.


Features:

  • Supplemental braking system applies towed vehicle's brakes in proportion to braking action of RV
    • Towed car's brakes are activated at the same time and with the same intensity as those in your motorhome
  • Truly proportional system uses the air pressure from your RV's brakes to apply the brake pedal in your car
    • Connects to RV's air or air-over-hydraulic brakes to sense when and how those brakes are applied
    • Ensures synchronized, reliable braking
  • No false braking
    • Coach air brakes must be activated for system to apply towed car's brakes
  • LED display mounts in motor home to alert you when the towed vehicle's brakes are applied
    • Connects to towed car's brake light switch to ensure proper reading
  • Compact, lightweight actuator is easy to connect, disconnect, and store
    • Custom seat bracket (sold separately) is required to complete installation
    • Universal floor plate (450650-01 - sold separately) can be used if a custom option is not available
  • Breakaway system (RM-8600) is sold separately
  • System meets the braking requirements of both the US and Canada
  • Made in the USA


Specs:

  • Application: motorhomes with air brakes or air-over-hydraulic brakes
  • Cylinder length: approximately 2'
  • Limited lifetime warranty


Automatic, Truly Proportional Braking

BrakeMaster offers truly proportional, synchronized braking by connecting directly to your RV's air or air-over-hydraulic brakes. The air cylinder that attaches to your towed vehicle's brake pedal will apply your car's brakes at the same time and with the same intensity as you apply the brakes in the RV. To achieve this proportional braking, the BrakeMaster uses air pressure from your coach's brakes to depress the brake pedal in your towed car. The result is uniform, real-time braking that mirrors the slowing or stopping action of your coach.


Many other proportional systems activate the towed car's brakes based solely on inertia. With this kind of setup, any activity that affects the forward momentum of your towed car - from the coach actually braking, to driving over a pothole - can activate the supplemental braking system and apply your towed car's brakes. This potential for false braking, which can occur simply from driving over uneven terrain, can create a rough ride for you in the RV and can also wear out your towed car's brakes over time. The BrakeMaster is different, though. Because it is tied into your coach's brakes and is not dependent on inertia, this system activates only when you apply the brakes in your RV, so there is no false braking.


This braking system will work with almost any RV that has air or air-over-hydraulic brakes. It will also fit nearly any car, although a seat adapter may be required for installation in certain vehicles.


Installation and Easy Connection

The BrakeMaster connects directly to your RV's air or air-over-hydraulic brakes, making the installation on the RV side quite involved. An advanced mechanical background is required. Once you have successfully tapped into the RV's brakes, use the included hose to connect your RV brake line to BrakeMaster's actuating cylinder. A custom seat adapter (sold separately) is required to secure the cylinder to the floor in your towed car. If a custom bracket is not available for your application, then a universal floor plate (450650-01 - sold separately) can be used instead. The clamp on the opposite end of the cylinder attaches to your car's brake pedal. When you apply the brakes in your RV, air will travel from the RV to the cylinder. The cylinder will then transfer that air pressure to the actuating arm, which will apply the brake pedal in the towed car.


Once the BrakeMaster is completely installed, connecting and disconnecting is quick, easy, and requires no tools or adjustments. To disconnect the system, just remove the clamp from the brake pedal, unclip the cylinder from the mounting bracket, and disconnect the air hose. To connect again later, simply attach the clamp to the pedal, secure the cylinder to the bracket on your floor or seat adapter, and reconnect to the air hose.


Monitor Alerts

Most supplemental braking systems have methods of letting you know you when the system is activated, but they don't necessarily inform you of whether or not the brake pedal is being depressed. Such setups leave opportunities for false notification, which can be dangerous and potentially damaging. If the system activates but doesn't depress your car's brake pedal, then your RV's brakes will be taxed because they will have to brake for the towed car as well. On the other hand, if the system isn't properly positioned, it could be pressing your car's brake pedal continuously, which could damage your vehicle. BrakeMaster's system is different. The included LED monitor connects to your towed car's brake light switch. When your car's brake light goes on or off, so does the notification light. This way you'll always know whether or not your car's brake pedal is being pressed.



9100 Road Master Brake Master for Motor Homes with Air or Air Over Hydraulic Brakes

Installation Details RM-9100 Installation instructions




Customer Reviews

Roadmaster BrakeMaster Braking System for RVs w/ Air or Air Over Hydraulic Brakes - Proportional - RM-9100

Average Customer Rating:  4.8 out of 5 stars   (86 Customer Reviews)

This truly proportional supplemental braking system connects directly to your motor home's air brakes and applies the brakes in your towed car using the same force that you apply to the brakes in your RV. Lightweight actuator removes for storage.

by:

Just completed a 6500 mile 3 month trip, California to mid Indiana, including Colorado Eisenhower and Wolf Creek passes, Brakemaster works great, no over braking, definitely helpful on those descents. Easy and quick to hook up. This is my second Brakemaster, and would definitely buy it again




by:

I've been looking for a braking system for my tow vehicle for a while trying to determine which one I wanted. For ease of installation, ease of use both when I'm not towing and when I'm towing, I decided on the RoadMaster 9100. I then shopped prices and came back to etrailer where I found not only better or comparable prices but all the other items I am looking for as well.


Comments
It’s now been a year and a number of both short and long trips since I installed the RoadMaster 9100 brake system. Works perfectly, is easy to quickly setup for towing and just as easy to remove for driving my toad. Satisfied buyer who continues to use etrailer products when there is a need.
Dave - 02/06/2021


by:

I installed this on our 2004 Chevy Colorado. Was a snap. You will need the optional relay kit too. Our RV is a 97 Monaco Roadmaster suggests dealer installation. I would go along with that too, for most people.
In my case, my skills include most things automotive and diesel and street rod electrical systems. So i was comfortable doing it.


Comments
What optional relay kit? Just ordered the brakeaway RM-9100, but cant find optional relay kit mentioned anywhere.
-- comment by: John - 12/30/2014



by:

The Roadmaster Brake sys, seat adapter, and Roadmaster base kit do a very good job towing my 2013 Explorer




by:

Just what I have come to expect when dealing with etrailer. Everything outstanding.




by:

Just recieved product and have not used it. People that I talked with indicated that it was a good product and that is why I ordered it.




by:

every thing looks fine




by:

They are the best




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by:

Review from a similar BrakeMaster in Tow Bar Braking Systems


Kit fits great! Hooked up a 2004 Workhorse to a 2002 Jeep Liberty. It might be preferable to be handy with some advanced mechanical skills and tools to install this efficiently. Directions are great but you do need to figure out your own locations for certain items like the break-away reservoir, compressor, routing lines and wires out of harms way, but not bad at all. Parts are great, everything there but added a couple different wiring splices of my own.




by:

Review from a similar BrakeMaster in Tow Bar Braking Systems


This kit was installed on a 2007 Jeep Patriot. It did require fabrication of a seat mount bracket. Fairly easy with some angle iron and some spacers. Install was fairly straightforward. It required mounting the surge tank inside the engine bay and running wiring to and from the battery and breakaway switch. It also required mounting the quick release air fittings at the bumper, inside the vehicle, and also at the rear of the RV. I also mounted the LED indicator inside the RV and utilized the existing towing harness to run power from the vehicle to the front of the RV.




by:

Review from a similar BrakeMaster in Tow Bar Braking Systems


Easy to install, works great! Highly recommend for air brake systems, quick to hook up and take out.




by:

Review from a similar BrakeMaster in Tow Bar Braking Systems


Great supplemental braking system. We are the second owners of our class-A motorhome. The original owners had installed a Brakemaster system; so we figured to use the same type of equipment as well - and we're glad we did. Having a proportional air over hydraulic braking system seems to provide a more accurate braking experience for our 2018 Ford Fiesta. Each time I apply brakes on the motorhome, a red LED light on the dash illuminates to tell me that the brakes are being applied on the tow vehicle as well.




by:

Review from a similar BrakeMaster in Tow Bar Braking Systems


Love the small unit in my mini cooper. The air brakes are true proportional when braking. It is easy to set up and break down.




by:

Review from a similar BrakeMaster in Tow Bar Braking Systems


Works great EZ install, dont forget the seat adapter bracket




by:

Review from a similar BrakeMaster in Tow Bar Braking Systems


recommend having it professionally installed or at least a advanced DIYer.




by:

Review from a similar BrakeMaster in Tow Bar Braking Systems


Great system. No messing around with settings. Works great out of the box.




by:

Review from a similar BrakeMaster in Tow Bar Braking Systems


For me it is the perfect towed braking system! Simple operating principle, easy installation, quick set-up and detach. Never needed for breakaway, but pre-trip test is always perfect functioning. Definitely saves on coach braking force needed.
(Installed on 2015 Itasca 34T DP w/2007 Toyota Tacoma)




by:

Review from a similar BrakeMaster in Tow Bar Braking Systems


Roadmaster was real slow with the delivery of the seat adapter. But Michael kept me informed all the way through to the delivery. etrailer is 5 stars all the way from start to finish. I look forward to using them in my orders to follow.
Now for ROADMASTER products
RM-643 safety cables quality is good work fine Delivery was fast
RM-9160 brake master system Love this system instructions were easy to follow
RM-15267 toad tail light/brake wiring good instructions for install
RM-1550-1 base plate good instructions for install except you need to drill two 1/2'' holes you must measure and mark as there is no pilot hole.
The whole system works great with the 2008 Honda Pilot
RM-88189 seat adapter I have yet to install as I had to make up my own for the trip.
I will say the seat adapter bracket is made just for the Honda and Acura, they had to make custom make. Thanks to all the car towed great for my first trip of 1,100 miles




by:

Review from a similar BrakeMaster in Tow Bar Braking Systems


Your customer service leaves nothing lacking, and this follow-up from you is so out of character for the many web sites I have purchased from over the years. I am impressed by you and your company.

I bought the tow bar and the brake system for my Equinox, and installed them my self (I am 70 years old) - and with your provided instructions and video, I had no problems (even though I was surprised by the number of parts and detail that went into the assemblies).

Both systems have worked very well, with no problems. I am completely satisfied with them, and have told my friends and traveling acquaintances about your company.

Thanks for your follow-up!




by:

Review from a similar BrakeMaster in Tow Bar Braking Systems


Got everything installed except the foot that mounts to the floor. It wasn't in the box. I called etrailer who contacted Roadmaster and they said they would ship and I should have in a couple of days. Installed everything else along with the tow bar and light kit. Followed all the instructions and all went smoothly with no issues. Just have to wait for the missing part to complete and test.




by:

Review from a similar BrakeMaster in Tow Bar Braking Systems


Fits perfectly!




by:

Review from a similar BrakeMaster in Tow Bar Braking Systems


Installation does take some time as you will have to find a good place to install the break away cylinder. I could not find any reference material for my application. 2018 Jeep Wrangler JL with the 2.0 liter engine. The only place I could find to install it was between the battery and the fender. If you are not mechanically inclined I would recommend having this installed by a professional.




by:

Review from a similar BrakeMaster in Tow Bar Braking Systems


Looks to be very complete and should work as intended. As of yet, have not installed and cannot comment as to whether it actually will work. Have confidence in the Roadmaster name and their products. Am not expecting any issues. (Just received yesterday, 01/28/21).



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