The ornamental design for an auto-unicycle with a safetywheel, as shown and described.
FIG. 1 is a perspective view from the front side of an auto-unicycle with a safety wheel.
FIG. 2 is a perspective view from the rear side thereof.
FIG. 3 is a perspective view from the front side thereof.
FIG. 4 is a perspective view from the rear side thereof.
FIG. 5 is a front elevation view thereof.
FIG. 6 is a rear elevation view thereof.
FIG. 7 is a left side elevation view thereof.
FIG. 8 is a right side elevation view thereof.
FIG. 9 is a top plan view thereof.
FIG. 10 is a bottom plan view thereof.
FIG. 11 is a right side elevation view with the seat raised.
FIG. 12 is a right side elevation view with the safety wheel raised; and,
FIG. 13 is a front elevation view with the pedals tilted.
The portions of the auto-unicycle shown in broken lines are for the purpose of showing environmental structure only and form no part of the claimed design.