I appreciate that Aptera made this pragmatic choice. Exotic wheels impact practicality of the vehicle. Looking at the EQXX concept they made complex choices like moving underspoiler; non-critical moving parts suck.
Currently the same size as the Fiat 500, a standard size. A caution, with a lot of testing left to do, tire size may change. I am sure it will always be a standard US size. Nothing exotic or difficult to find.