Dahon's award-winning D7 bike is a good balance of quality and price. Utilizing a chromoly frame, the derailleur ensures smooth, fast shifting between gears, while the telescoping handle ensures a comfortable riding position for all sorts of heights. Top it off with the fact that it folds up in 15 seconds, and you've got one hell of a folding bike.

Dahon D7
Buy It Now at Kozy, $550