The ornamental design for a stationarybike, substantially as shown and described.
FIG. 1 is a perspective view of a stationary bike according to a first embodiment of the present invention;
FIG. 2 is a front elevation view of the stationary bike of FIG. 1;
FIG. 3 is a left-side elevation view of the stationary bike of FIG. 1;
FIG. 4 is a rear elevation view of the stationary bike of FIG. 1;
FIG. 5 is a right-side elevation view of the stationary bike of FIG. 1;
FIG. 6 is a top-plan view of stationary bike of FIG. 1; and,
FIG. 7 is a bottom plan view of the stationary bike of FIG. 1.
In the drawings, the evenly-spaced broken line showing of the stationary bike depicts environment and forms no part of the claim; the dash-dot-dot-dash lines represent boundaries of the claimed design and form no part thereof.