Multi-layer internal construction of a passenger car tire: 1 - tread: profile and mixture affect the properties of the tire; 2 - base: reduces rolling resistance; 3 - wound nylon bandage: suitability for high speeds; 4 - breaker made of layers of steel cord: increases the stability of movement; 5 - carcass: form support and tire strength; 6 - inner lining: the inner airtight layer replaces the chamber; 7 - side part: protects the frame from damage; 8 - profile of the core: maintains the accuracy of control and movement; 9 - core: provides a strong fit on the rim; 10 - bead reinforcement: for precise steering and high driving stability.
Synonymous with maximum speed - a capital letter after the last digit
The capital letter after the last number on the side of the tire indicates the maximum speed allowed for this tire. The 175/70 R14 tire with the letter designation S is designed for a maximum speed of up to 180 km/h, with the letter T - up to 190 km/h. A tire designed for a maximum speed of 210 km/h is marked with the letter H. Conventional M+S tires with the letter Q are approved for speeds up to 160 km/h.
The DOT number indicates the age of the tire
The number indicates the actual date of manufacture of the tire «DOT» on the side of the tire: since 1990 this number has not been followed by a triangle. If, for example, the number «DOT» 1500, the tire was manufactured in week 15, 2000. New tires with a production date from October 01, 1998 must have an ECE test number on the sidewall. This verification number ensures that the tire is a type-tested structural element that complies with the Economic Commission for Europe quality standard (ECE-R 30). If your vehicle is to be fitted with tires with a DOT number greater than 408 but without an ECE test number, then you are driving without a General Driving Permit.
The trial verification number is recognized by the capital letter E and the number of the country of origin, for example: 1 - Germany, 4 - the Netherlands.
Visitor comments