So this thread started as a mini velo subject on 20" which then moved to 16".
Ron has published various pictures of his 16" folders with with ZEE groupset with are 10speed and he even said that he uses a deore 10s cassette which is clearly showed on his pictures including the following one fitted with a kenda (45-305) or (16x1.75)

Note that people reposted pictures for your benefit. If you cannot see that, we cannot do much for you.

Then you accuse people (inc myself) to be full of BS but if you did a quick search you would get your info... parktool, sram, shimano, all the same
https://si.shimano.com/en/dm/MARD001...e_chain_length
https://www.parktool.com/en-int/blog...-length-sizing
https://www.sram.com/globalassets/do...and-chains.pdf

The picture from CrimsonEclipse are of his dahon mariner fitted with a 50T cassette and while it is not a 16", the point of these was to show you the your demand for clearance when on the largest cog is pointless as I said and pictures demonstrated, the lowest point of the bottom pulley (or the smallest ground clearance) is not on the largest cog. The wheel size is irrelevant as it is a product of the derailleur mechanism which the youtube video above display pretty well.
All my bikes 5 bikes (4 20" and 1 700c) display the same thing: the lowest point of the bottom pulley is not achieved on the largest cassette cog/gear 1

All in all, people made it easy for you and when you are not served with a silver spoon, you accuse people of ignorance and BS when really the issue is that you cannot be bother to search by yourself...