Part of getting it to fold to a reasonable size is the smaller wheels..
Bike Friday's bikes are made in several sizes, that is rare in the folding bike biz,
predominantly there is a single size, made, so adequate fitting is more difficult.
24 " or a 20" bike friday might offer better riding position
their wheels are 16" or 20", the effective top tube length is their sizing ,
being a low mono-tube front portion..