FIG. 1 is a front view of a bicycle frame showing my new design;
FIG. 2 is a back view thereof;
FIG. 3 is a right view thereof;
FIG. 4 is a left view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a bottom view thereof;
FIG. 7 is a right, rear, top perspective view thereof;
FIG. 8 is a right, front, top perspective view thereof;
FIG. 9 is a right, rear, bottom perspective view thereof;
FIG. 10 is a right, front, bottom perspective view thereof;
FIG. 11 is a left, front, top perspective view thereof;
FIG. 12 is a left, front, bottom perspective view thereof;
FIG. 13 is a left, top, rear perspective view thereof; and,
FIG. 14 is a left, bottom, rear perspective view thereof.
The broken lines are included for the purpose of showing portions of the bicycle frame and form no part of the claimed design.