- 5 - rim width in inches;
- J - conventional designation of the rim profile;
- 13 - rim seat diameter for tire in inches;
- H2 - presence of two humps on the rim (annular projections for installing tubeless tires);
- ET - conventional designation of rim offset;
- 29 - rim offset in millimeters.
Note: Rim offset (ET) is the distance between the plane that divides the wheel rim in half (plane equidistant from the sides of the rim) and the mounting (fastening) plane of the wheel.
The car is equipped with tubeless tires 175/70R13 82T, or 165/70R13 82T, where:
- 175(165) - profile width in millimeters;
- 70 - the ratio of the profile height to its width in percent;
- R - designation of radial tire;
- 13 - tire seat diameter in inches;
- 82 - load index (the maximum permissible load on this tire is 470 kgf);
- T - speed index (the maximum speed limit for this tire is 190 km/h).
The article is taken from the website (www.VazBook.ru)
The maximum load on the tire is duplicated in deciphered form along with the indication of the maximum permissible air pressure in the tire.
It is also allowed to install 5½Jx13 wheels with a rim extension of 25-30 mm on the car.
When giving recommendations on the choice of certain tires, the manufacturer proceeds from the conditions of ensuring maximum stability, control, cross-country ability and safety of the car. Thus, wheels with a large offset can touch the brake mechanism parts, and with a smaller offset - increase the load on the hub bearings and can lead to unpredictable behavior of the car during emergency braking or in case of failure of one of the brake system circuits. High-profile tires can touch the body parts at maximum suspension travel, and wide ones - rub against the car side member or its wing at large turning angles.
A tire with a lower load index may burst when a fully loaded vehicle hits an obstacle, while a lower speed index may result in tire failure at high speed.
Tires that can be installed on a car are divided into three types: summer, winter and all-season. If the car is used all year round and the winter is snowy, it is better to have two sets of wheels: with winter and summer tires. Winter tires are made of softer rubber, and narrow wavy cuts - lamellas - are made on the tread. This allows the tire to better cling to the roughness of the surface and not "harden" at sub-zero temperatures. The inscription "M + S", "MS" or the "snowflake" pictogram can be applied to the sidewalls of winter tires. The possibility of using studded tires in winter depends on the specific operating conditions of the car. It should be taken into account that studs are designed to improve the grip of the tire on a slippery hard surface, such as ice or packed snow. In other cases, studs do not work, and on asphalt they even slightly worsen the grip of the tire on the road.
Using winter tires in summer leads to their intensive wear.
All-season tires can be used all year round. They are distinguished from other tires by the inscription "All season" or "Tous terrain" on the sidewall. According to their performance, they behave satisfactorily in various weather conditions, but in summer they are inferior to summer tires in terms of technical performance, and in winter - to winter tires.
The tread pattern can be universal or directional, and is not regulated by the manufacturer's requirements. With a directional tread pattern, the inscription "Rotation" and/or an arrow are applied to the sidewall of the tire, indicating the direction of rotation of the wheel when the car is moving forward.