Hidden type quick-release wheel hub assembly with reinforcing arrangement

A quick-release wheel hub assembly comprising:

• a hub including an axial hole, the hub including a compartment defined in each of two ends thereof, a wall of one said compartment including a circular slot, each said end of the hub further including a shoulder;
• two bearings mounted in the compartments, respectively, each said bearing having an end that bears against the shoulder of an associated said end;
• a shaft extended through the axial hole of the hub and the bearings;
• a sleeve secured on the shaft and positioned between the bearings for reinforcing said shaft and preventing disengagement of said hub from said shaft;
• and
• a c-shaped ring secured in the circular slot and positioned beside the other end of one said bearing, to fix one said bearing, and to prevent one said bearing from detaching from said compartment of said hub, said c-shaped ring having two ends each defining a hole, thereby facilitating mounting of said c-shaped ring in said circular slot.