A wheel hub-and-bearing set assembly for a roller skate includes a spacer,
a sleeve formed with a first flange at one end thereof and having an outer
face, a pair of bearings mounted in a space between the spacer and the
sleeve, a hub body sleeved on the sleeve, and a bearing cap disposed at
the other end of the sleeve and formed with a second flange that
cooperates with the first flange and the outer face to define a retaining
space thereamong. The hub body is formed with a tongue that is fittingly
received in the retaining space.
