The ornamental design for a bicyclestand, as shown and described.
FIG. 1 is an oblique view of a bicycle stand showing my new design;
FIG. 2 is a side elevation view thereof showing the front side;
FIG. 3 is a side elevation view thereof showing the back side;
FIG. 4 is side elevation view thereof, showing the left side;
FIG. 5 is a side elevation view thereof, showing the right side;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
Internal ribs to provide structural strength to the feet of the bicycle stand in FIG. 7 are shown in broken lines and form no part of the claimed design.