The size of tires

On the sidewall of the tire suffered a series of numbers and letters that indicates the manufacturer of the technical data of the tires. The designation indicates the width in millimeters - this is the width, which the tire touches the road. The second digit of the slash means the ratio between the height and width of the tire and is given in percentages. The lower the ratio, the more low-profile tires. The letter ?�R?� is used to refer to radial tires, the letter refers to the figure bore diameter disk (for all models considered the same).