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