We tow a 2015 Jeep Wrangler 4 door. We have a roadmaster set up and we have a roadmaster air cylinder installed in the 2910T as well so our set up remains as it was in the Class A we traded last April with Earl. That has worked well so far. What we notice when we read the FMCA book as it comes out every year is that some car makes that worked last year are no longer good. The Mini that is being towed as a 2010 may be fine but they are not listed as towable now with 4 down. When we were looking at them the dealer was not aware of the requirements.
The brake component is not generally an option. The weight of the vehicle was once the basic determining factor on installed
towing brake. States and Canada have requirements. Usually no brake is not consistent with state laws where ever you are driving.
While it is an excellent idea to have supplemental braking in a TOAD, it is not required in many states. The roadmaster "guide to towing laws" is not technically correct and they refuse to notr that. For example, in Colorado, a "trailer" 1,000# or more requires the "trailer" have its own brakes. BUT, if you look in the Colorado traffic definitions you find a "trailer" is a *commercial* vehicle. Farm and non-comercial towed vehicles are not included. For example, a farmer pulling 6,000 lbs of hay on a flatbed doesn't have supplemental brakes. A tow truck, towing a damaged car from a wreck... Doesn't have supplemental brakes added to the vehicle it is towing.
Roadmaster wants to sell supplemental braking systems, so they 'error' on the side of you having to add supplemental brakes.
Again, very smart idea to have them, but not always agsinst the law.