Question In Utah, the minimum tread depth for a tire on a motorcycle is: Answers 1/32 of an inch. 2/32 of an inch. 1/4 of an inch. 1/2 of an inch. Explanation In Utah, all motorcycles must have tires with tread depths of at least 2/32 of an inch. Take a FREE Practice Test Now This questions appears in the following tests: Utah Practice Test