There are several ways that wheels are measured to determine what type of vehicle they will fit onto. There is the wheel diameter and width. There is also the offset and the backspacing of the wheel, which determine how far out or in the wheel rests in relation to the hub. But one of the most important wheel measuring criteria is the bolt pattern of the wheel. This determines if the wheel can even be bolted onto a particular car's hub at all.
Count the number of lug holes. This is the easiest part of determining a wheel’s bolt pattern. The number of holes will be four or five for cars, though some trucks can have six or even more lug bolts holding the wheels on.
Measure the distance between the lug holes on a wheel with an even number of holes by measuring the distance between the holes that are directly across from each other. For example, a common bolt pattern for a wheel with four lug holes is 4x100, which means there are four lug holes that are 100 mm across from each other.
Determine the lug pattern on a wheel with an odd number of lug holes by measuring from one lug hole to the area directly between the two holes across from it. For example, a 5x114 wheel has five lug holes, and the distance from each lug hole to the area exactly between the opposing lug holes is 114 mm.
