In the state of Arkansas, it is illegal to use metal-studded tires with studs protruding more than _____ inch from the tire's surface.

If an Arkansas driver chooses to use metal-studded tires between the months of November and April, the metal studs must not protrude more than one-sixteenth of an inch from the surface of the tire to prevent road damage. [Slippery Roads, Adjusting the Vehicle Speed, Arkansas Driver License Study Guide]