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When you hit the brakes in your motorhome, you want your towed vehicle to respond in perfect sync. The Roadmaster BrakeMaster for RVs with Hydraulic Brakes measures the pressure from your RV’s hydraulic brakes and applies the same force to your towed car’s brakes at the same time. Because it’s a truly proportional system, the braking power is matched automatically—light for gradual stops and firm for quick ones. There’s no false activation from bumps or dips, just smooth and predictable braking every time.
Most of the BrakeMaster system installs permanently, so it stays out of sight and out of your way. When it’s time to tow, attach the lightweight actuating cylinder between the brake pedal and driver’s seat. It braces securely for precise braking, then disconnects quickly for storage. The cylinder is about 2' long and requires either a custom seat bracket or a universal floor plate (450650-01, sold separately). That design gives you the reliability of a fixed system with the flexibility of a quick setup.
Unexpected disconnections can happen, but the included BrakeAway system is ready if they do. The breakaway reservoir keeps a reserve of pressurized air that will immediately apply the towed car’s brakes if separation occurs, bringing it to a controlled stop. It meets U.S. and Canadian braking requirements, adding an extra layer of safety on every trip.
Not every system confirms when your towed car is actually braking, but this one does. The LED indicator light mounts on your RV dashboard and connects directly to the towed car’s brake light switch. When the light comes on, you know the pedal is being pressed and the brakes are engaged. It’s an easy way to monitor performance without guessing what’s happening behind you.
This hybrid design uses your RV’s air compressor and a proportioning valve to send just the right amount of air to the towed car’s braking cylinder. The result is responsive, balanced braking that stays consistent on flat roads or mountain descents. Once installed, it delivers the kind of steady, trouble-free performance you can depend on every time you tow.
Flat towing can be a much more convenient way to take your car RVing with you than using a trailer or a tow dolly. It'll save you storage space both at home and at the campsite, and it takes less time and hassle to hook up.
To flat tow your vehicle, there are 5 basic components you're going to need: a tow bar, a base plate kit, a safety cable set, tow bar wiring, and a flat tow braking system.
| For the RV | Between the RV and Towed Car | For the Towed Car |
|---|---|---|
| Hitch | Tow bar | Base plate |
| Wiring plug | Safety cables | Braking system |
| Wiring adapter cord | Wiring kit/diodes |
The custom-fit base plate installs on the frame of your toad so you can connect the car to your RV with a tow bar. Hook up safety cables between the vehicles to ensure that the toad does not separate from the motorhome if the tow bar becomes detached. Tow bar wiring syncs your vehicle's signal lights with your motorhome's tail lights, as required by law in most states. Finally, the flat tow braking system - also required in most states - activates the brakes in the toad when you hit the brakes in the RV, making for smoother, safer braking, and preventing wear on your motorhome.
Alternate Instructions
Customer Satisfaction Score:
79% were satisfied with this product
21% of customers were not satisfied
Ratings & Reviews
I love this whole kit accept for a couple things that I'm working through now. I have a 2018 F150 and a 2020 Nexus Ghost super C. On the F150, I purchased the seat bracket. When I put he hydraulic cylinder on, the hose was too short. It had a permanent pre-made hose. I have enough line to make a new hose, but had to go the the hardware store and buy new compression fittings to make the new line. No big deal, but annoying. Also on the NeXUS brand diesel pusher, I called Roadmaster to get clarification on where exactly to bust into the brake line and clear up the warranty question. They were very polite and helpful. They told me exactly how to determine the "metered" line. I've yet to finish that part of the install. But they indicated it would not affect my warranty with International nor would it cause any unsafe situation should my vehicle come loose from the MH and have to use the emergency stop feature built into the Brakemaster system. Both my MH and my tow vehicle is protected. I think that they could do a much better job explaining the MH side of things. All in all-it seems it will be a great system.
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.
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
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.
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.
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)
This system works like advertised. I feel it is a very reliable system. I had a friend install it and it sounded like it went pretty well.
Make sure you order the plate needed for your vehicle. Had to wait a week until that came in to complete the installation. Plus if you are placing in a Ford Edge, there is a firewall access behind the battery. Knowing this makes it easier to do. Also on the Edge you have to make a small extension to get the connectors easier to disconnect.
The install on my Ford Maverick is clean and functional, so this is more of a customer service review... excellent customer service!
During the 4-day towing set-up install, the forecast was for freezing temps and my rig was not winterized. I called in mid panic and the motorhome was moved indoors.
A few months after using the tow set-up, a minor problem developed. I called and the CSR apologized and said, I can see how that might be frustrating, and a replacement cable (slightly longer) was sent free of charge.
EZY pezy mounted air reserve cylinder right behind the right side of the rad will fit in easy and accessible
Works great, my motorhome was already set up to pull a toad with and air line already run to the rear bumper and the indicator light already in the motorhome dash so installation in the toad was the easy part.
The system works great! I was too intimidated by my coach's air brake system to attempt to install the line on the coach, so I had that done by a pro. But I did the rest of the install myself. It was straightforward, and the installation instructions were crystal clear. The product works great.
Parts arrived on a timely basis and were very well packaged. I have not started the install yet.
recommend having it professionally installed or at least a advanced DIYer.
Fast delivery in good condition .
Very knowledgeable company excellent service thank you so much for me guiding me into the correct equipment to tow my Jeep Wrangler!
Ordering was easy, I verified the seat bracket by telephone, and everyones I talked to was a pleasure, all my questions were answered in a professional manor. Price could not be beat anywhere else. My dealer could not beat the price, so I bought what I needed and then gave it to my dealer to install. I have now used it for about a week driving 1,000 miles and it works as advertised, even up and down mountains using the exhaust brake, everything worked better than I could hope. Thank you
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!
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.
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Armand L.
8/13/2015
I installed on SENECA 2015 for towing JEEP WRANGLER 2012 ,and after one year I am very satisfy of this system.It is really a progressive braking system working smoothly and efficiency . PS : sorry for my english , I am a french speaker.