FIG. 1 is a top, front, and left-side perspective view of a bicycle frame showing our new design;
FIG. 2 is a top, rear, and left-side perspective view thereof;
FIG. 3 is a bottom, front, and left-side perspective view thereof;
FIG. 4 is a bottom, rear, and left-side perspective view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a right side elevation view thereof;
FIG. 7 is top plan view thereof;
FIG. 8 is a bottom plan view thereof;
FIG. 9 is a front elevation view thereof; and,
FIG. 10 is a rear elevation view thereof.
The broken lines in the drawings illustrate portions of the bicycle frame and environmental structures that form no part of the claimed design.