Question Retreaded tires: Answers May be used on any part of a bus. May be used on the front of a bus. May be used on the rear of a bus. May never be used on a bus. Explanation Regrooved, recapped, or retreaded tires are prohibited from use on the front wheels of a bus. This questions appears in the following tests: Massachusetts Class A Knowledge Test Minnesota Class A Knowledge Test Minnesota Class B Knowledge Test Nevada Class A Knowledge Test New Jersey Double North Dakota Class A Knowledge Test North Dakota Double Oregon Double