The ornamental design for a tire, as shown and described.
FIG. 1 is the front elevational view of a tire, for which the other sides, include rear, top and bottom view, are the same;
FIG. 2 is the left side view, for which the opposite side, right side view is the same;
FIG. 3 is an enlarged fragmentary front elevational view thereof; and,
FIGS. 4, 5 and 6 are perspective views of a tire showing the new design, it being understood that the pattern repeats uniformly throughout the circumference of the tread.