How to Read Your Tire Size: The Numbers Explained

Every tire sidewall carries a code like 225/45R17 94V. Here is what each part means: • 225 — section width in millimetres. • 45 — aspect ratio (sidewall height as a percentage of width). • R — radial construction. • 17 — wheel diameter in inches. • 94 — load index (max weight per tire). • V — speed rating (V = up to 240 km/h). Matching these numbers exactly keeps your speedometer accurate and your handling predictable. Not sure? Our AI assistant can look up the correct size from your year, make and model.