We claim the ornamental design for the bicycle pump head, as shown and described.
FIG. 1 is a front isometric view of the bicycle pump head, showing our new design;
FIG. 2 is a front-elevational view of the bicycle pump head;
FIG. 3 is a left side-elevational view of the bicycle pump head;
FIG. 4 is a rear-elevational view of the bicycle pump head;
FIG. 5 is a right side-elevational view of the bicycle pump head;
FIG. 6 is a top view of the of the bicycle pump head; and,
FIG. 7 is a bottom view of the bicycle pump head.
The broken line showing of elements is included for the purpose of illustrating non-claimed environmental matter and form no part of the claimed design.