Question Radial and bias-ply tires: Answers Should be used together. Should be used together on the front of a vehicle. Should not be used together. Explanation Radial and bias-ply tires should not be used together. All wheels on a vehicle should be the same style and equally-sized. This questions appears in the following tests: Hawaii Tank Hawaii Passenger Iowa Class A Knowledge Test Kentucky Passenger Michigan Class B Knowledge Test Michigan Double Michigan Double Nevada Double Washington Passenger