How did Marcel Duchamp make Bicycle Wheel from two ordinary objects?

Marcel Duchamp created his first "ready-made assisted," titled Bicycle Wheel (1913), by mounting a bicycle wheel onto a stool.1

By combining these two ordinary, mass-produced objects, Duchamp intervened in their original purpose to challenge the traditional, excessive importance placed on unique works of art. This act was a form of protest that helped redefine art as an intellectual process rather than a purely material one.1