The specification indicates the correct dimensions for tires that will fit a specific vehicle model and year. In this case, it refers to the measurements and specifications of tires designed for a 2012 Toyota Highlander. This includes the tire’s width, aspect ratio, wheel diameter, load index, and speed rating. An example might be 245/65R17, where ‘245’ is the width in millimeters, ’65’ is the aspect ratio, ‘R’ indicates radial construction, and ’17’ is the wheel diameter in inches.
Adhering to the recommended tire specification is crucial for maintaining the vehicle’s performance, safety, and handling characteristics. Correct tires ensure proper speedometer calibration, prevent rubbing against the vehicle’s frame or suspension components, and contribute to optimal braking and fuel efficiency. Historically, manufacturers have precisely engineered tire specifications to complement a vehicle’s suspension geometry and weight distribution. Using the incorrect specification can negatively impact these aspects.