First, look at the center of your wheel and count how many lugholes there are. There should be four, five, six, or eight. This will be the first number in your bolt pattern measurement. Next, measure the diameter of the imaginary circle that the lugholes form. You can do this by measuring from the center of one lughole to the center of the hole directly across the circle from the first. Measured in millimeters, this number will be the second number in your measurement. Bolt patterns are displayed in this fashion 5x114.3.