A vehicle shall be rejected if the tread depth measured in a major tread groove nearest the center of the tire is less than 2/32 inch or 4/32 inch on the front axles of any vehicle with a gross vehicle weight in excess of 10,000 pounds.
N.H. Admin. Code § Saf-C 3211.02
(See Revision Notes at chapter heading Saf-C 3200) #8915, eff 6-22-07