Why do tires slowly lose air? From what it seems, they are sealed and shouldn’t really be letting anything in or out, but they still need to be refilled every now and then.

Question

I understand pressure changes as heat changes, but even in the same season you will still lose a slight amount of pressure.

In: 141

Answer 1

Oxygen molecules are really, really teeny tiny compared to other molecules.

They’re so small that over time, they simply squeeze out from inbetween two rubber molecules.