Tyre change - when a wheel assy goes to the wheel overhaul facility to replace the worn out tyre. This is when it is inflated in a cage.
Wheel change - when a worn out wheel assy is removed from an a/c.
Wheel assy's are normally stored at 40psi not 200psi, once on they are inflated to the nominal pressure. You'll notice that those inflating the tyre on the a/c stand in line with the wheel assy, so should the hub fail it doesn't take their legs off.