I am considering adding brakes to my 6x12 3500 lbs single axle trailer. With all of the equipment I have added, it is pretty much loaded to its max capacity. Although the truck handles it fine, i'm going through brakes too fast and I would like to be able to stop a faster in an emergency. I would like to know how much it will cost to add brakes and what all is needed. I was looking at northern tool, and they have 10" disc brakes for $110 (for one side ), but they appear to be hydraulic and I would want electric (right?) Either way, that price seems kind of steep. Would it be logical to replace the axle with a new one with electric brakes? I was just searching and found this site. They have a 3500lbs axle with electric brakes for $190. That seems reasonable. I could also upgrade to a 5200lbs axle for only $60 more. I would also have to add a brake controller and plug to the truck. So what do you think? EDIT: I found this on their site too (click here. Do you just add these to a standard axle with no brakes? What else would I need?