Final answer:
Radial and bias-ply tires should not be used together on a vehicle. It is best to use either radial tires or bias-ply tires, depending on the specific needs of the vehicle.
Step-by-step explanation:
Radial and bias-ply tires should not be used together on a vehicle.
Radial tires have steel belts running under the tread, which help to maintain the shape of the tire and provide better stability and traction. On the other hand, bias-ply tires have layers of cords running diagonally across the tire, giving them a stiffer sidewall and better load-carrying capacity.
Using both types of tires together can result in different handling characteristics, as well as uneven wear. It is best to use either radial tires or bias-ply tires, depending on the specific needs of the vehicle.