Dexter makes the brake assembly but right off, I couldn't tell you who makes the whole frame etc. We do know from the factory tour, that the frame/wheels come assembled then they put that on the assembly line and add wires, walls, etc. We did have problems with our brake assembly on our new tt which you can see at... Self-Adjusting Brake Problems
. Someone else had problems with the suspension.... Suspension stabilizer not connected to the spring
. I don't think though that most folks are having these kind of problems.