Question Regrooved tires are: Answers Allowed only on the front of a bus. Allowed only on the rear of a bus. Not allowed anywhere on a bus. Explanation Regrooved, recapped, or retreaded tires are not permitted to be used on the front of a bus. Take a FREE Practice Test Now This questions appears in the following tests: Idaho Knowledge Test Class A , Michigan Knowledge Test Class B , North Carolina Knowledge Test Class B , Washington Double ,