195 65r15意思

"195 65R15" is a tire size designation, where:

• "195" refers to the tire's width in millimeters. This is the width of the tire from one sidewall to the other when it's mounted and ready to be used on a vehicle.
• "65" is the aspect ratio, which is the percentage of the tire's width that the tire's sidewall height is. In this case, the sidewall height is 65% of 195mm.
• "R" stands for "radial," which indicates the construction method of the tire. Most tires sold today are radial, meaning the layers run radially across the tire.
• "15" is the wheel diameter in inches. This is the size of the wheel that the tire is designed to fit.

So, a tire size of 195/65R15 means that the tire is 195 millimeters wide, the sidewall height is 65% of that width, it's a radial tire, and it's designed to fit a 15-inch wheel.