If you have never ridden a full size trike, you might not know how ridiculous they actually are. I have a 1972 24" Schwinn Town and Country lightweight (adult trike). Any camber to the road surface and it wants to turn that downhill direction. To ride it even on the mildly cambered streets of our small town is a constant battle with leaning to one side or the other and pulling on the bars to keep it on a straight path. It is also very odd to turn. turns must be done at lower speeds to avoid tipping over. And you must be constantly aware of the track of the rear wheels so as not to clip a curb or pothole etc.. Let one of those rear wheels drop off the edge of the road surface and you are battling to keep from crashing. I'm betting Schwinn stopped selling them as they were getting reports of little old ladies getting hurt from crashes...