I see FnHon frames available on AliExpress, though it kept kicking me off the site because I am not registered with them and not going to sign in with another site name and password. So 16" frames can be had, and not a bad deal if you buy components there too at low cost, as building up a bike with USA retail component costs gets expensive. But no one wants to order a frameset with no returns, if they don't know if it will fit them, and wouldn't until fully built-up. Chicken-or-egg. If not dealers, FnHon needs to have "agents", users of the product, in major cities, able to give test rides, in exchange for a small commission on each sale. I guess that would be too complicated for the low retail price.

But what FnHon could do, is show diagrams of a given frame and handlepost, showing persons of various sizes superimposed on a finished bike (or persons that size actually on the bike), indicating height and inseam, arm length, etc. That may not be definitive, but it would be something, for people who could tell what their riding position should be and know their body measurements.

Bike Friday is the opposite; You tell them detailed body dimensions, riding style, etc, and their programs spit out an optimum frame size and handlepost height. FnHon could have the same on their website, and then superimpose that optimum frame over their standard frame, and a customer could see that the frame is perhaps 50mm too short reach for a standard canted handlepost, but might work with that topped with a 50mm horizontal stem on a cylinder-topped post, or with 50mm double-clamps, provided that is within limits of good handling parameters.

If FnHons are selling fine, they're not going to do the above. If they want more sales, they or other framebuilders will go the extra mile.