I had a list of questions for the rep. This was one of them. They consider the brake assemblies perfectly adequate for the intended use. With my current TV I have no problems stopping. The exhaust brake with 4:10 gears is phenomenal. With that being said I don't know if I would have got a factory disc brake system if they offered it. I plan on doing it. I will use better U.S.A bearings, races and seals. I can pick the coatings on the assemblies for better life expectancy and pick the best actuator. I can pick what I think is the best wheels and tire package. I will run the factory setup for a couple years then put what I take off on a farm trailer. Until then I am perfectly happy.