bikeforums.net forum thread
That means it's either going to be electric or hydraulic and then you would have to come up with a fool proof way to connect them without injecting air into the hydraulic lines.
Pneumatic I would guess would be out since you would have no way to create air-pressure to replenish a tank.
If you do succeed in adding them how do you apply them? A separate lever? That seems dicey.
|brake for trailers|
Make a yolk out of 1/8th inch x 1.5" stainless steel flat bar. Attached to a head tube.
|Home made trailer hitch|