The ornamental design for a tiresidewall, as shown and described.
FIG. 1 is a front elevational view of a tire sidewall showing our new design;
FIG. 2 is an enlarged fragmentary view of the upper quadrant of FIG. 1;
FIG. 3 is an enlarged fragmentary view of the lower quadrant of FIG. 1; and,
FIG. 4 is a perspective view thereof.
The broken lines defining the tire tread and inner bead represent unclaimed environmental subject matter; the broken lines immediately adjacent the solid line showing of the tire sidewall represent the boundaries of the claimed design but form no part thereof.