That was discussed a few months ago.I viewed a hummer mountain bike yesterday at Sam's club it folds smaller has more gears and costs about half as much. I would rather make that a single with a spare wheel . It would still cost less . The puma did get a good review but i would want to ride it first.Alternatively you could convert a Dahon or yeah 20 inch folder for less money also.The Puma is 775 dollars but you could coordinate with your shoes Dahon does not make shoes.