The ornamental design for a tire, as shown and described.
FIG. 1 is a front elevational view of a tire, the rear, top and bottom views thereof being identical;
FIG. 2 is a left side elevational view thereof, the right side elevational view being identical thereto;
FIG. 3 is an enlarged fragmentary front elevational view of FIG. 1; and,
FIG. 4 is a perspective view of a tire showing the new design, it being understood that the pattern repeats uniformly throughout the circumference of the tire.