Tractor tread

A tractor tread is a continuous track used for the movement of certain types of heavy equipment vehicles, such as tanks, tractors and cranes.

While investigating the theft of a cooling unit at a medical lab in Cave County, the Dynamic Duo expected to find the tracks of tractor treads near the building, because they assumed a crane was used to rip the cooling unit out, but they were wrong, and when the looked, the didn't find any sign of tracks made by tractor treads.

External Link

 * Tractor tread at Wikipedia