"Special mileage commercial tire" shall mean a tire manufactured with an extra layer of rubber between the cord body and original tread design, which extra layer is designed for the purpose of recutting or regrooving, and which tire is specially labelled as a special mileage commercial tire.
RSA 259:104
RSA 263:85, II. 1965, 299:1. 1981, 146:1, eff. Jan. 1, 1982.