To meet your high performance customer's expectations, you'll need to know as much as you can about custom wheels. On the lug nuts. The hub hole of hub-centric wheels is made to perfectly match the diameter of a vehicle's hub. For example, a hub hole that is 70mm in diameter will fit perfectly on a 70mm hub.
Auto makers use hub-centric wheels because they provide a more accurate fit.
However, only the most expensive aftermarket wheels are hub-centric. When replacing a wheel, you must select a replacement with a bolt pattern or circle that matches that of the vehicle. Using the 4-lug pattern as an example, the bolt circle is 100mm in diameter. Since no two lug holes appear directly across from each other in a 5-lug pattern, determine the bolt circle diameter by starting at the back of one hole and measuring to the center of a second hole that is on the opposing side.