Portion of Bike Frame

FIG. 1 is a perspective view of a portion of bike frame in accordance to one embodiment of the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

In the drawings, the broken lines depict environmental subject matter only and form no part of the claimed design.