Can Speeder Bikes go over terrain that is over 1 height or is there an upper limit to how high they can go? For example, if I have a tall landing pad that is about height 2 or 3, can they just zoom up to the top of it and end their move on top of it?

If I'm not wrong, there's somewhere in this forums an email from Alex Davy where he explain that you can go up or down with a speeder X heights per movement.

So if bikes have speeder 1, you could move from height 0 to 1, then from 1 to 2, etc.