When installing tires or wheels that are not listed in the technical passport, an appropriate entry should be made in the documents for the car. As a rule, this requires the permission of the manufacturer.
When replacing a disk, it is necessary to take into account not only its width and diameter, but also the pressing depth. The pressing depth is the distance from the middle of the disc to the contact surface of the wheel disc to the brake disc.
All disc wheels are made with an annular ledge. The annular protrusion is a bead pressed onto the landing shelf, which, even with a very sharp turn of the car, does not allow the disc to squeeze the tubeless tire.
According to existing legislation, it is allowed to use tires with a residual pattern height of at least 1.6 mm along the entire tread tread.
For safety reasons, it is recommended to replace summer tires already at a residual tread height of 2 mm, and winter tires at 4 mm.
The tread height should be measured at the points of greatest wear. At the bottom of the longitudinal grooves of the tread there are marks of tire wear (TWI).
The locations of the marks are marked on the sidewall of the tire with the letters TWI or triangles (see illustration 25.0a). The height of the wear marks is 1.6 mm.
When measuring the remaining tread height, the height of the wear marks is not taken into account. The determining factor is the height of the figure P in the place of greatest wear (see illustration 25.0).
Tires of balanced wheels, while maintaining the prescribed pressure in them, correctly adjusting the wheel alignment angles and impeccable operation of the shock absorbers, wear out approximately evenly over the entire tread. For uneven wear, see the Tire Fault List.
It is not possible to say anything definite about the service life of tires from different manufacturers. this period depends on various factors, namely:
- road surface;
- tire pressure;
- driving style;
- weather conditions.
Rapid tread wear is favored primarily by sporty driving, rapid acceleration and heavy braking.
Attention! M+S tires are only effective in mud and snow when the minimum remaining tread height is 4 mm.
Attention! Check the tires for cuts and, if present, use a small screwdriver to determine the depth of the cut. If cuts reach the carcass, then the steel cord of the tire begins to rust under the influence of penetrating water. Because of this, the tread can peel off from the carcass and the tire breaks. Therefore, for deep cuts in the tread, for safety reasons, the tires must be replaced.
Visitor comments