The ornamental design for a bicyclehub, as shown and described.
FIG. 1 is a front side perspective view of a bicycle hub in accordance with my new design;
FIG. 2 is a front side elevational view of the bicycle hub in accordance with my new design, with the overall shape of the bicycle hub being axial symmetrical; and,
FIG. 3 is a right side end elevational view of the bicycle hub in accordance with my new design, with the left side end elevational view being identical.