Everything you need to know about tire sizes and how to understand what the numbers on the sidewall mean. See our helpful sizing charts.

How to read tire size is complicated. Learn how to read tire size, use our tire size converter, or browse our tire size conversion charts.

Oct 15, 2025 · CR explains the cryptic sidewall codes on a typical tire, explaining how to decode tire size, load index, maximum pressure, speed rating, and more.

Nov 8, 2025 · Car Talk tire experts take a look at how to read tire sizes. Read on for information explaining tire sizes, how they function, and how to quickly identify them.

May 17, 2025 · Learn how to decode tire size numbers like a pro. This 2025 beginner’s guide explains each part of the tire code, how to choose the right size, and how tire size affects safety, comfort, and …

Discover what all the letters and numbers on your tire mean, from width to speed rating. Use this guide to decode tire size and find the perfect fit for your vehicle.

Learn how to read and understand tire size codes. Complete explanation of tire measurements, aspect ratios, load ratings, speed ratings, and what they mean for your vehicle.

If you’re unsure of how to read tire measurements from your tire walls, the information and graphics below will tell you how to read tire size, understand and interpret it.

Tire size codes may look like a jumble of numbers and letters, but each component conveys important information about the tire's dimensions and capabilities.