I have a rigidbody with a mesh collider(bike) and a skatepark with a meshcollider.
The question is why my bike pass throught the floor?
Maybe the first section helps:
One of them needs to be marked as “convex”.
Else it is possible that both are kinematic. In that situation it would not work as well.
Another issue could be that one is scripted and the position is set manually, but with rigidbodies one should apply forces instead.