The specification that dictates how a wheel attaches to a vehicle’s hub, particularly for models like the RAV4, is crucial for ensuring safe and proper wheel mounting. This specification defines the diameter of the circle on which the wheel studs are located, as well as the number of studs. For example, a designation of 5×114.3 indicates five studs positioned on a circle with a diameter of 114.3 millimeters.
Adherence to the correct wheel mounting specification is paramount for several reasons. It guarantees that the wheel is centered accurately on the hub, preventing vibration and ensuring even load distribution. Using an incorrect specification can lead to wheel detachment, posing a significant safety hazard. Historically, standardization of these specifications has evolved alongside automotive engineering advancements, aiming for increased reliability and safety.