The specification dictates the arrangement of lug nuts on the wheel hub of a 2003 Dodge Ram 2500. It is expressed as two numbers, the first indicating the number of lugs, and the second indicating the diameter of the circle (in millimeters or inches) on which the lugs are positioned. As an example, an 8×6.5 specification indicates eight lugs arranged on a circle with a diameter of 6.5 inches.
This specification is critical for ensuring proper wheel fitment and safe operation. Using wheels with an incorrect specification can lead to wheel instability, vibration, and potential damage to the vehicle’s wheel studs or hubs. Historically, manufacturers have varied these specifications across different models and years, necessitating precise identification of the correct specification for a specific vehicle.