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Easily mount your new BrakeMaster supplemental braking system with this custom seat adapter. Bracket remains hidden beneath your vehicle's seat when not in use.
Features:
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we're going to be taking a look at RoadMaster's line of custom seat adapters for the BrakeMaster braking system. You'll want to use our fit guide to determine the appropriate seat adapter for your vehicle.This custom seat adapter provides an anchor point for your BrakeMaster supplemental braking system. The BrakeMaster cylinder extends, pressing your brake pedal, and it needs something else to push against. This provides an anchor point for it to push against. As every vehicle is different, RoadMaster has a complete line of custom-fit brackets to ease the installation of your BrakeMaster system.The included hardware will allow you to easily attach the bracket to the base of your seat. The anchor point here at the center of your bracket is going to give you an attachment point for your BrakeMaster system.
It'll allow it to pivot, to make it easy to get the proper adjustment for your cylinder to your brake pedal. The custom bracket remains hidden, so when not in use you won't even know it's there.Our customer Chuck M. had to say, "The RoadMaster seat mounting plate for the breakaway system is a must. I do not recommend using the plate that requires drilling into the floor when you can use this adapter and save time. It does not get in the way when not in use.
Again, thanks for providing a great product."And that's a good point, Chuck. Compared on the plate that requires drilling into the floor, these custom adapters don't require you to modify the vehicle, and provide a nice solid anchor point.And that completes our look at RoadMaster's line of custom seat adapters for the BrakeMaster braking system.
Customer Satisfaction Score:
91% were satisfied with this product
9% of customers were not satisfied
Ratings & Reviews
Exactly as advertised. Installation was easy and only took a few minutes
The RM-88291 seat mounting plate for the breakaway system is a must. I do not recommend using the plate that requires drilling into the floor when you can use this adapter and save time. And it does not get in the way when not in use. Again, thanks for providing a great product.
Fit my 2017 Wrangler perfectly
I purchased this seat adapter for the RoadMaster air brake system for my 2014 F150. The seat adapter is required for proper positioning of the air brake cylinder. The etrailer web site was helpful in identifying the correct part number and this part was delivered to my home quickly. I have not yet installed the seat adapter but the instructions seem straight forward.
Works like it should, had no problems i nstalling
This is a must have as I was transferring my breaking system from a jeep to a Ford F150. The roadmaster system works so well.
Easy to install - just follow instructions that are included - as you can see fits great - priced right
Should include break mounting post
Tracking was difficult, no notifications. Then to find out there was duties to be paid. I was not impressed.
There is no torque specs on the installation guide. Oh well I will have to figure something out.
Thanks for getting my part here in time for my trip. As always!!
2019 seat mount has square pegs which don't fit into round holes. But it works with the front of the seat up some.
Great product. Just as I have found with all Roadmaster products.
I tried two months ago complaining about the rust on my new system after one year of ownership and I live in a dry climate and I purchased the jacket (which I use) was quickly emailed by Clayton O of etrailer asking for pictures. I sent Clayton O numerous pictures.
I have emailed etrailer Clayton O since then (due to no reply) and he says nothing.
I’ve spent my hard earned money occasionally at etrailer when the need arises. One time I have disappointment, they appear to reach out, then nothing, thanks to Clayton O.

Sierra K.
10/1/2021
Clayton O. no longer works at etrailer.com. I can help with whatever issue you are having. Unfortunately, rust is a wear and tear issue that is not covered by warranty. Here is a help article with tips to prevent further rust:
Helpful Links
I bought this part because I had an air operated cylinder from my last jeep.
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Thomas B.
2/16/2019
No issues at all with the seat adapter. Sure makes connection of the braking unit quick and easy.