FIG. 1 is a front perspective view of a frame of three-wheeled stroller, showing our new design, the broken lines are for illustrative purposes only and form no part of the claimed design;
FIG. 2 is a right side elevational view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a left side elevational view thereof; and,
FIG. 7 is a rear view thereof.