Bolt Circle

4, 6, and 8 lug patterns.
Measure from the center of one stud hole directly across the center of the wheel,
to the center of the opposite hole (see diagrams) mesurement
should equal the bolt circle diameter.

5 lug patterns.
Mesure from the center of one stud hole, skipping the adjacent hole,
to the outer of the furthest stud hole.That mesurement should
match the sizes on our wheel list's.

Wheel size and Back spacing

To measure wheel size and width, start with diameter (A) go from inner lip to inner lip.
Width (B) is also inner lip to inner lip. Back spacing or offset (C)  is found by
placing a straght edge along back of wheeland measuring from center
to your straght edge (see diagram)

Measuring Clearance

When measuring front and rear fender/body clearance first remove the wheel
from the car, measure from the face (or front) of the rotor/drum
to a straight line down the edge of the fender. (A) to (B).

Also Measure clearance from the body to a straight line
(A) starting at the front of Rotor/drum. For the rear repeat measure
frome face of drum/rotor (B) to straight line of edge of the fender