I can picture what Corpo is trying to do, but I'm not so sure he has a 20" drop center rims unless they are from something way back in the 1930's that I am not familiar with. There is a possibility that he has a 22.5 tubeless wheel which of course cannot be used with a 20" tire. Many years ago, it wasn't that uncommon for people to but a put a tube in a tubeless tire that was too bad to patch. The tubes were made by vulcanizing a tubeless stem on a tube after the brass stem had been sawed off. That was jerry rigging that I would never recommend these days. Flaps are only used in multiple piece wheels to keep the tube from chafing. I would like to see a picture of the rim Corpo has.
