205 55r16什麼意思

"205 55R16" is a tire size designation that provides information about the tire's width, aspect ratio, construction method, and wheel diameter. Here's what each part of the designation means:

  1. 205 - This is the tire's width in millimeters. It means the tire is 205 millimeters wide from one sidewall to the other when it's mounted and inflated on a rim.

  2. 55 - This is the aspect ratio, which is the ratio of the tire's sidewall height to its width. In this case, the sidewall height is 55% of the tire's width. So, 55% of 205mm is the sidewall height.

  3. R - The letter "R" stands for "radial," which means the tire is constructed with radial ply cords, where the cords are arranged at right angles to the direction of travel. This is the most common type of tire construction.

  4. 16 - This is the wheel diameter in inches. It means the tire is designed to fit on a wheel that is 16 inches in diameter.

So, a tire size of 205/55R16 indicates a tire that is 205 millimeters wide, has a sidewall height that is 55% of the width, is a radial tire, and is intended for a wheel that is 16 inches in diameter.