I’m not sure! You could probably at least double the rib length if the wheels are scaled accordingly. I can however answer the opposite “how small” question to

I’m not sure! You could probably at least double the rib length if the wheels are scaled accordingly. I can however answer the opposite “how small” question to some extent by linking to this really cool project: https://youtu.be/hI5UDKaWJOo https://youtu.be/hI5UDKaWJOo