205 55 r16意思

"205 55 R16" is a tire size designation, indicating the tire's width, aspect ratio, 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.

  2. 55 - This is the aspect ratio, which is the ratio of the tire's height to its width. In this case, the tire's height is 55% of its width. So, if the tire is 205 millimeters wide, its height is 0.55 * 205 = 112.75 millimeters.

  3. R - The letter "R" stands for "radial," indicating that the tire is a radial tire. Radial tires are the most common type of tire today.

  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, with a height of 112.75 millimeters (55% of the width), and is meant to be used with a 16-inch wheel.