Back then I thought 16" and 20" sized wheels were too small. I thought I'd have an unstable and clumsy ride on them. So I chose the Dahon Jack for its big wheels (26"). I said to myself, "rigid mountain bike that folds, ayos!"
In fairness, the Jack rode well. The Schwalbe Big Apple tires were wide but slick. They provided just the right cushion.
The handlebars could be adjusted effortlessly because there was a special groove along the stem that ensured the handlebars and fork were always aligned.
Dahon installed grip shifters which were simple to operate. There were 24 gears to choose from, so the bike could do well in flat and hilly roads.
Folding the bike was easy. There was just one latch in the middle of the top tube to fold and unfold the bike.
There was really no problem in the Dahon Jack as a full-sized bike. It gave a sweet and comfortable ride. But as a folding bike, it was a failure.