a spoke connecting flange 3 and a ratchet mechanism 5 for interlocking a drive gear 4 and the inner element 2b and a pipe portion 2c interconnecting the left cover 2a and inner element 2b as shown in fig3 the left cover 2a has a brake apparatus assembled thereto and including brake shoes 6 and a brake controller 7 the hub 2 is supported by a hub shaft 11 through balls 8 and ball pressers 9 the brake apparatus is supported by the hub shaft 11 through a bush 10 the hub shaft 11 has mounting nuts 12 screwed to opposite ends thereof for securing the brake apparatus and hub 2 to bicycle frames 101 connected to the hub shaft 11 the above components constitute a brake and hub assembly of a bicycle as shown in fig3 the brake apparatus includes a main brake body 100 having the brake shoes 6 brake controller 7 and other components and a brake ring 13 coupled to the hub 2 a basic brake operation is based on a mechanism in which the main brake body 100 applies a frictional braking force to the brake ring 13 thereby to brake the hub 2 the construction and working of this apparatus will be described in detail hereunder the brake ring 13 is in the form of a braking body which is a separate component from.