The bottom of the tire is raised over one meter; the center of gravity is not raised as much because (I think) the tuck during the jump accounts for much of the height.
With some additional thought, this description seems plausible:
Upward forces = (spring force of tire)+(force applied to...
I have two unicycle-related questions that seem fairly straightforward.
1) Do smaller wheel diameters offer a mechanical advantage? For example, would you have more leverage on a unicycle with a 20 in wheel versus a 36 in if the crank length was the same? I know from experience that you do...