How to Measure Wheel Offset, Width, Diameter, & PCD (Quick & Easy Explanation) So we've answered the question of "What is Wheel Offset".... now, let's go over how to measure it! In this video, we'll go over exactly how to measure a wheel, including measuring its offset, width, diameter, and PCD (Bolt Pattern). With an understanding of how wheel sizing numbers are measured, our hope is that videos like this help you increase your knowledge of how a wheel can fit your car, and how the resulting fi