The specification defines the dimensions and type of temporary or previously owned tire intended for emergency use on a specific vehicle model. It dictates the tire’s diameter, width, load-carrying capacity, and speed rating to ensure compatibility with the vehicle’s wheel well and overall handling characteristics in the event of a flat tire.
Adherence to the designated specification is crucial for maintaining vehicle stability, braking performance, and preventing damage to the drivetrain or suspension system. Furthermore, using a compliant tire helps ensure the vehicle operates within its designed safety parameters, particularly when carrying passengers or cargo. Historically, these specifications have evolved alongside vehicle designs to optimize performance and safety standards.