If a vehicle is equipped with radial tires, where should they be mounted?

Answer: C — On all four wheels

Radial tires are designed to be mounted on all four wheels of a vehicle to ensure optimal performance, stability, and handling. This uniform installation allows for consistent traction and wear across the vehicle, enhancing both safety and driving comfort. When radial tires are used on the front and rear wheels together, they help maintain proper alignment and balance, which can improve fuel efficiency and overall driving dynamics. Using radial tires selectively on just one set of wheels can lead to uneven handling characteristics and may increase the risk of tire-related issues. Additionally, mixing tire types or styles can create performance discrepancies that might affect braking and steering, potentially compromising safety. Therefore, mounting radial tires on all four wheels is the best practice to achieve the full benefits of their design.