Reading tire size can be a bit confusing at first! The tire size is usually displayed on the sidewall and consists of a set of numbers and letters, like "205/55R16." The first number (205) represents the tire width in millimeters. The second number (55) is the aspect ratio, which indicates the height percentage compared to the width. The "R" stands for radial construction, and the last number (16) is the wheel diameter in inches. Do you need help with a specific part of reading tire sizes?