How can I accurately measure a vehicles wheel bolt pattern, regardless if it is a car or truck?

  • Are any special tools needed?
  • Is there a certain process to measuring a pattern?

PCD or Pitch Circle Diameter is typically given as a number multiplied by another number. The first number is the number of bolts, nuts or studs and these can be simply counted. The second number is the diameter of a circle which has a central point in the centre of the hub and whose outside line goes through the centre of each bolt hole.

It is therefore possible, using a simple ruler, to calculate the PCD using little more than a ruler and the conversion tables shown at this useful link.

  • 1
    Steve, if you would, post the pic from your link then explain the math ... IOW, bring the information here! ... Great find, btw. I didn't realize there was a way you could find the PCD mathematically, but it perfect sense now that I think about it. – Pᴀᴜʟsᴛᴇʀ2 Mar 30 '16 at 21:31

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