[填空题]
Calculate the moment of inertian7 * gwj3(nopm )kjlx p(32blx of a bicycle wheel b(p7r+ c88nb 9 egpucd66.7 cm in diameter. The rim and tire have a combined mass of 1.25 kg. The mass of the hub can be ignop9pce 8uc7gr+b8(nbdred (why?). $kg \cdot m^2$