Downtube for a Bicycle

FIG. 1 is a front perspective view of a downtube for a bicycle;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The portions of the Figures shown in broken lines in the view are for illustrative purposes only and form no part of the claimed design.