Bolt patterns can be 3, 4, 5, 6, 7, 8 or 10 lug holes. A bolt circle of 5 x 4. There are four important measurements that are used to categorize and identify a wheel for fitment purposes. If there is an EVEN number of lugs: Measure center-to-center on lugs directly across from each other.
The bolt pattern, lug 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, or 8 lug holes. A bolt circle of 4x would indicate a 4 lug pattern on a circle with a diameter of mm. The bolt pattern is comprised of two numbers - the first indicates how many bolt holes are on the wheel, and the other describes how far apart they are.