A YouTuber called The Q decided to make “invisible” wheels for his bicycle, by using (d’oh!) Plexiglas. While this is of course a terrible idea–aside from the added weight, Plexi doesn’t deal with stress very well–it was actually fun to watch him make it:
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You’ll note that he’s only riding the bike on smooth, paved bicycle paths. How many curbs do you reckon a Plexi wheel would survive before cracking?