Yikes! that's messed up .. if you do have a 38/16 .. there was an error on assembly or someone lowered the gearing radically.. I'd probably by a cheapo front crank and get the chainring in the 52/53t range .. then you have some room to work with the gearing.. a 38/14 won't even get you to Dahon's published specs with a 406/1.75 tire ( 31/51/69 g/i ) .. you would need at least a 13t to get close (40/55/74) .. so I'd double check your existing tooth count.. if it is a 38t up front, I'd grab a 13t while you're buying cogs.. or change the crank so you don't have to run such a small rear cog... better efficiency with larger diameter gears..
Last edited by BruceMetras; 11-09-15 at 08:01 PM.