It's inexpensive and if you do a lot of.

Tool to measure rim bolt pattern. Some of the more common sizes for bolt patterns include: Bolt patterns can be measured in inches and millimeters using two number system. The rims, or wheels, of your car typically come in a few.

You just need to measure the midpoint of one circle/buttonhole to that of a circle sitting directly. Where the first number shows the holes in the wheel whereas the second shows the diameter. This is a really simple and handy tool that makes it easy and accurate to measure a rims or hubs bolt pattern.

Obtaining the bolt pattern for rims with 4 lugs is quite easy. 4 bolts on 4″ diameter, 5 bolts on 4.5″ diameter, 6. It's the topline c402 bolt circle gauge.

4, 6, and 8 lug bolt patterns: Wheel pcd gauge, stud bolt pattern rim bolt pattern measuring tool, pcd ruler, lug bolt pattern gauge for 4 5 6 8 holes sliding caliper. That’s the diameter of the circle formed by the centers of the wheel lugs.

It can appear in either inches or millimeters, so be sure you know which one you’re looking at. Measure from the back of one hole to the center of the hole across from it. To find your bolt pattern, measure the distance as accurately as possible and then find the corresponding bolt pattern in the conversion table below.

For example, if you have a 5 lug. Manufacturers specify a bolt's size by indicating its diameter, thread pitch, shank length, grade, head and thread length.