Tires Nankang Rx 615

Tire size: this is the tire size designation, for example 225/45 R18:

225 – tire width in millimeters,
45 – aspect ratio, meaning the sidewall height is 45% of the tire width,
R – indicates radial tire construction,
18 – inner diameter of the tire (rim size), expressed in inches.

The speed index is a letter designation that indicates the maximum speed at which a tire can safely operate while maintaining the allowable load. According to the law, a tire should have at least the speed index (and load index) recommended by the vehicle manufacturer. It is possible to use tires with a higher speed index, which is often permitted by the vehicle manufacturer.

The load index (also known as the load rating) is a numerical indicator that specifies the maximum permissible load a single tire can carry at the recommended pressure and within its speed rating. Each numerical load index corresponds to a specific weight (given in kilograms), e.g., 91 means 615 kg.

Tire season: indicates the weather conditions for which the rubber compound and tread pattern are designed. Summer, winter, or all-season. A compromise between summer and winter tires; they perform well in various climatic conditions, but in extremely hot or winter climates they are significantly inferior to dedicated tires.

In Poland, the PN-C94300 standard "Tyres – packaging, storage and transport" is in force. According to its guidelines, tires can be placed on the market, stored, distributed, and sold without restrictions for up to 3 years from their production date. The tires retain all their safety and performance properties.