# Measuring Wheel Bolt Pattern

**How to measure a wheel bolt pattern the CORRECT WAY!!**

The bolt pattern or bolt circle is the diameter of an imaginary circle formed by the centers of the wheel lugs. Bolt patterns can be 4, 5, 6, 7, or 8 lug holes, however tuner applications are typically 4 or 5 lug. Bolt circles are measured in both inches and millimeters, therefore you may hear a bolt pattern referred to as both (i.e. 5x114.3 mm is also referred to as 5x4.5). A bolt circle of 5x114.3 mm would indicate a 5 lug pattern on a circle with a diameter of 114.3mm (or 4.5").

The diagram is an example of the proper method for measuring bolt patterns.

The conversion of inches to mm is 1 inch to 25.4 mm.