Pencil tread depth gauge held against a tire lug, 32nds scale vi…

Close-up of a hand holding a pencil-style tread depth gauge upright, its white 32nds scale reading from 13 up to 32 clearly visible. The probe rests on a dirty tire lug in the foreground with a mud-caked tread blurred behind.

AI caption January 2009 · Photo 14 of 67