There are several types of tires: road, universal (all season), winter, high cross-country ability. The type of tires is selected based on operating conditions.
Tire sizes.
D - outer diameter,
d - wheel rim seat diameter,
H - tire profile height,
W - profile width.
When replacing tires, use only tires of the same size and design as the recommended tires for your vehicle and with the same or greater load capacity.
The use of tires of any other size or type can seriously affect handling, comfort, speedometer/odometer accuracy, ground clearance, economy, the distance between the body and the tire or snow chain.
Warning: Do not mix radial and bias tires. This may cause dangerous vehicle behavior, leading to loss of control.
The marking may contain one of the following designations:
145 - nominal profile width, expressed in millimeters. This size is selected based on the table "Tire markings and tire pressure" and must correspond to the tire size recommended by the manufacturer.
80 - the ratio of the height of the tire profile to its width, expressed as a percentage (%).
If this designation is absent, the ratio is 0.80...0.82. This size is selected based on the table "Tire markings and tire pressure" and must correspond to the tire size recommended by the manufacturer.
R - designation of radial tire.
B - designation of diagonal tire. Radial and diagonal tires differ in the arrangement of the cord threads. Radial tires have lower rolling resistance and a longer service life compared to diagonal tires.
13 - tire seat diameter, expressed in inches. This size is selected based on the table "Tire markings and tire pressure" and must correspond to the tire size recommended by the manufacturer.
75 - conditional load index. It is selected based on the table "Tire markings and tire pressure" and must correspond to the tire load index recommended by the manufacturer.
S - tire speed index. It is selected based on the table "Tire markings and tire pressure" and must correspond to the tire speed index recommended by the manufacturer.
When marking tires, optional designations may be used:
6PR - ply rating, a conventional value indicating the load-bearing capacity of the tire, that is, the strength of its carcass (4PR - tires for passenger cars, 6PR and 8PR - tires for light trucks and minibuses).
Symbols used when marking American-made tires:
LT - indicates the application area for SUVs, small trucks and minibuses; in this case, P is a passenger car tire.
Table. Tyre speed indices.
Table. Tire load indexes.
