[填空题]
Calculate the moment of , s d4iq;o7kwrine7xbts+ln 2klz3p63 /upkq +uv rtia of a bicycle wheel 66.7 cm in diameter. The rim and tire have a combt6zs /3 up+x3kl k ulq+7nv2bpined mass of 1.25 kg. The mass of the hub can be ignored (why?). $kg \cdot m^2$