Figure 22.1. Metric tire size designation:
1. Tire type:
P - for passenger cars;
T - for temporary installation;
C - for commercial vehicles.
2. Profile width (in millimeters):
185;
195;
205, etc.
3. Profile height/profile width:
70;
75;
80.
Construction type:
R — radial;
B - diagonally encircling;
D — diagonal.
5. Rim diameter (in inches):
13;
14;
15.
Using tires of different sizes may affect the vehicle's driving performance. Do not install tires of different designs on your vehicle (diagonal and radial) simultaneously; this greatly impairs the car's handling. It is recommended that tires be replaced in pairs on the same axle, however, if only one tire is being replaced, install it with the same design and tread pattern as the other one on the same axle.
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2. Tire pressure significantly affects vehicle handling and tire wear. Check your tire pressure at least once a month, and at least before a long trip (see "Weekly checks").
3. Discs that have cracks, deep corrosion, if they do not hold air, if the mounting holes are broken, or if the symmetry of the disc is disturbed must be replaced. Repairing disks by welding or rolling is not recommended.
4. Wheel balancing also significantly affects handling, braking quality and other technical characteristics of the car. Poorly balanced wheels, in addition to the vibrations transmitted to the entire car and passengers, lead to accelerated tire wear. When changing a tire, the wheel should be balanced in a workshop.