Goodyear just announced a spherical tire tire that looks straight out of Hollywood.
Unfortunately, I can’t find an licensable photo of it online, so I will just direct you to a Google Image search for the “Goodyear Eagle-360”.
The sphere looks like a rubber ball and is supposedly support not with axles, but with magnets.
It is, of course, designed for self-driving cars.
It’s only a concept right now, but you can read more here.