215 50 r17的意思

"215 50 R17" is a tire size designation, specifically a tire profile for car tires. Here's what each part of the designation means:

• 215: This is the tire's section width in millimeters. It represents the width of the tire from one sidewall to the other when mounted and measured on a specified width wheel.

• 50: This is the aspect ratio, which is the ratio of the tire's section height to its section width. In this case, the tire's section height is 50% of the tire's section width.

• R: The "R" stands for "radial," indicating that the tire is a radial construction. This is the most common type of tire construction, where the layers run perpendicular to the direction of travel.

• 17: This is the wheel diameter in inches. It means the tire is designed to fit a wheel with a diameter of 17 inches.

So, a tire size of 215/50 R17 means the tire has a section width of 215 millimeters, an aspect ratio of 50%, is a radial tire, and is intended for a wheel with a diameter of 17 inches.

This tire size is commonly used on passenger cars and small SUVs.