I would include this kind of detail on the site somewhere, along with what the total 'size' of the wheel is, etc.  Then people can calculate (via simulation, if not analytically) the house edge.

Edit: I notice the 'division of the wheel' isn't shown in the 'provably fair' section until after my first spin.  It could be shown as soon as the division has been revealed graphically, since by then I've already committed to playing and spent my BTC.