How To Measure Wheel Width, Diameter and Offset – The Complete Wheel Fitment Guide – Part 1

In Part One of our video series “The Complete Wheel Fitment Guide” we take a look at what Offset is, and how Width, Diameter and Offset are correctly measured on an unmarked wheel.

This is particularly useful when choosing aftermarket wheels when you need to figure out the specs of your factory wheels as a starting point.

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Summary:

Width: The measurement across the wheel from the inside of the lip to the inside of the lip on the opposing side.

Diameter: The width of the wheel across the face from the base of the lip to the base of the lip.

Offset: The distance that the mounting pad of the wheel deviates from the exact centre line of the width of the wheel. Can be Positive (towards the face of the wheel), or Negative (towards the rear face of the wheel).

About The Author

  • Will Ford

    Will Ford operates Boosted Media with his brother Tom and is the on-camera host and technical lead behind the channel’s sim racing hardware reviews.

    With a background in electrical engineering, adult education, and automotives, he combines hands-on product evaluation with practical technical analysis and a passion for motorsport and sim racing to explain how sim racing hardware performs in the real world, and is one of the most experienced people on the planet when it comes to reviewing Sim Racing Hardware.