When buying tires to be clear about the conditions under which you operate them. The wrong choice of tires can give you a lot of inconvenience. For example, when selecting winter tires for driving exclusively in the city, should pay attention to non-studded tires, but with frequent trips out of town, where the roads are not handled by agents and frequent ice, studded tires are preferred. When buying a tire should be carefully considered marked on the sidewall of the tire. Here we will try to clearly explain the meaning of some labels. Basic notation on the sidewall: 1. The manufacturer, model bus 2. Tyre size a) The width of the tire.
Indicated in millimeters and must be greater than the width of the disk rim at 25-30%. The formulas for calculating the ratio of width to the width of the disk rim tires: b = (axc) / 24,5, and a = (bx 24,5) / c, where a – width of the tire in millimeters; b – width of the disk rim in inches; c – from 0.7 to 0.75, 24.5 – number of millimeters in an inch. b) The height of a tire. In fact, the so-called aspect ratio of a tire (mm) to width (mm). This ratio is a percentage.
For example: tire 205/70 R14. The height profile of the tires – 70% width, ie of 205 mm., and is 143.5 mm. If the height of a tire is not specified, it is 82% of the width.