Hub-bearing unit for a wheel of a motor vehicle

A hub-bearing unit having a rotation axis and comprising:

• a stationary radially outer ring,
• a hub having a radially outwardly extending flange at an axially outer side and an axially extending tubular portion at an axially inner side and a radially outwardly extending toothed profile at the tubular portion, a portion of the hub being located radially inside the radially outer ring, and the hub being rotatable relative to the radially outer ring about the rotation axis;
• a radially inner ring mounted on the hub in axial abutment with a radial external shoulder of the hub,
• a toothed sleeve mounted axially inward of the radially inner ring and having a radially inner surface including at least one groove mating with the toothed profile;
• wherein the tubular portion includes a radially outer cylindrical surface,
• wherein an axial portion of the radially inner surface of the toothed sleeve lies on or is bounded by a first imaginary cylinder,
• wherein the axial portion of the radially inner surface engages the radially outer cylindrical surface, and
• wherein the first imaginary cylinder and the radially outer cylindrical surface are coaxial.