R 408.17422 Fire apparatus tires and rims.

Rule 7422. (1) A thorough visual inspection of the tread and sidewall areas of fire apparatus tires for cuts, cracks, splits, or bruises, including a tread depth measurement, must be made at least annually. A record of this inspection must be maintained for a minimum of 10 years. (2) A tire must be replaced if 1 of the following occurs: (a) The average tread depth is worn to 5/32 of an inch or less. (b) The tread depth at any 1 location is 2/32 of an inch, or less. (c) A cut or crack exposes the cord fabric. (3) A replacement tire must meet or exceed the standards of the original tire furnished with the apparatus. (4) Fire apparatus tires and rims must be inspected inside at least once every 10 years.