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. This questions appears in the following tests: Alabama Class B Knowledge Test Alabama Passenger California Class A Knowledge Test California Double Delaware Class A Knowledge Test Hawaii Class B Knowledge Test Maine Class B Knowledge Test Michigan Double Nebraska Tank Oklahoma Class B Knowledge Test Rhode Island Class B Knowledge Test Rhode Island Passenger Utah Class B Knowledge Test Vermont Tank Washington Tank Wisconsin Class A Knowledge Test