About Tire Reference

Tire sizing is full of codes, tolerances, and trade-offs that are easy to misread. Tire Reference exists to provide accurate, easy-to-understand tire calculations and fitment information so you can compare options with confidence before you buy.

We focus on transparent math, practical context, and tools that respect your time — no sign-up walls, no jargon for its own sake, and no guesswork where numbers should do the talking.

Our calculators are built on widely used tire sizing conventions and standard geometric formulas applied to metric and flotation tire formats. Where we show specs, comparisons, or fitment context, we aim to explain how the numbers are derived — not just what they are.

Accuracy, clarity, and transparency guide every feature we ship. Calculator output is a strong starting point for research, but we always encourage you to confirm final fitment against your vehicle, wheels, and intended use. Read our disclaimer for more detail.