Measuring real tire dimensions
How Rim Width Affects Tire Cross-Sectional Profile
How rim width changes a tire's mounted section width, crown shape and sidewall curvature, plus how to read sidewall numbers and estimate width with a simple chart and calculation.
How to Measure Actual Tire Diameter
Learn how to find tire diameter from sidewall numbers, measure a mounted tire with a tape measure, check bike tire size, and understand why actual and calculated diameters differ.