Nominal size versus actual dimensions
2 posts
How Tread Wear Changes Tire Diameter
Learn how tire sidewall markings define nominal size and how tread wear reduces actual diameter, affecting speedometer accuracy and vehicle clearance.
Actual Tire Dimensions by Size: Nominal Sizes vs Manufacturer Specifications
How to read tire sidewall sizes, calculate sidewall height and diameter, and see why the same size tires have different actual widths in manufacturer dimension charts.