The ornamental design for wheel for an automobile, as shown and described.
FIG. 1 is a front view of the wheel for an automobile according to the claimed design;
FIG. 2 is a back view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a sectional view taken along line 7-7 of FIG. 1;
FIG. 8 is an enlarged front view taken along 8-8 of FIG. 1; and,
FIG. 9 is an enlarged sectional view taken along 9-9 of FIG. 7.
The broken line showing of wheel portions, rim portions, and spoke portions is included for the purpose of illustrating environmental structures and forms no part of the claimed design.