The specification describes the dimensions and type of tire originally equipped on a specific model year vehicle. This information is crucial for ensuring proper fitment, performance, and safety when replacing the vehicle’s tires. It typically includes details such as the tire width, aspect ratio, and wheel diameter. For example, a specification might read “205/65R15,” indicating a tire with a width of 205 millimeters, an aspect ratio of 65, and designed for a 15-inch wheel.
Adhering to the original equipment manufacturer’s (OEM) specification offers multiple benefits. It maintains the vehicle’s intended handling characteristics, ensures accurate speedometer readings, and avoids potential interference with the vehicle’s suspension or body. Using the correct tire size also contributes to optimal fuel efficiency and braking performance. Historically, vehicle manufacturers have carefully selected tire specifications to complement the vehicle’s overall design and performance characteristics.