61:31:01:16.  Tires and wheels. All buses shall meet the following tire and wheel requirements:

          (1)  No tire mounted on the bus shall have a cut into the fabric, be worn so that the fabric is visible, or have knots or bulges in the sidewall or tread;

          (2)  No tire on the wheels of the steering axle shall be worn to less than three thirty-secondths of an inch of tread depth on any two adjacent tread grooves;

          (3)  No tire mounted on wheels on the bus shall be worn to less than two thirty-secondths of an inch of tread depth on any two adjacent tread grooves; and

          (4)  No wheel shall be bent, cracked, or damaged to the extent that it affects safe operation of the bus. Lug nuts shall not be loose, missing, or stripped.

          Source: 5 SDR 19, effective September 14, 1978; 8 SDR 87, 8 SDR 134, effective July 1, 1982; 12 SDR 151, 12 SDR 155, effective July 1, 1986.

          General Authority:SDCL 32-21-3.1.

          Law Implemented:SDCL 32-19-12, 32-19-13, 32-21-3.1.