We know quite a lot about how bikes behave, we've been building them for decades, centuries. While we might not grok all of the specifics behind the physical d

We know quite a lot about how bikes behave, we've been building them for decades, centuries. While we might not grok all of the specifics behind the physical dynamics, consider this: We also don't know the specifics of why gravity works. We know enough about it to make practical use of it, it keeps us on the ground and we fall at about 9.81m/s^2, but how we are affected by gravity over vast distances is still a mystery. Why we are attracted. If we can get along just fine without being blown away by the fact that we don't even know how we stay on the ground, I don't think it's that amazing that we struggle with the dynamics of a particular system of locomotion. We can make it work well enough.