Tire size is a code on the side of a tire that tells you its width, sidewall height, and the wheel size it fits.

The Speed Rating on a tire is a letter code that shows the top speed it can safely handle when properly inflated/mounted.

The sidewall is the section of the tire extending from the tread down to the bead. It provides lateral stability.

Numeric / Alpha Numeric code designated by the Tire Manufacturer.

Tread Depth in 32nds of an inch