The ornamental design for a wheel, as shown and described.
FIG. 1 is a front left perspective view of a wheel for a vehicle according to the present invention.
FIG. 2 is a front view of the wheel shown in FIG. 1; and,
FIG. 3 is a left side view thereof, the right side being a mirror image thereof.
In FIGS. 1-3, the broken lines show environmental structure and form no part of the claimed invention. More specifically, in FIGS. 1 and 2, the centrally located broken lines show wheel hub structure, including bolt holes.