Tire#Markings
The DOT number is a pressed- on passenger car tires at least one tire sidewall string of numbers that, inter alia, the date of manufacture of the tire is. The acronym DOT stands for the U.S. Department of Transportation Department of Transportation that this identification has introduced in the late 1970s for productions from 1980. Meanwhile, it is applied by the global tire manufacturers.
Composition
The production week is the last part of the defined by DOT Tire Identification Number TIN (Tire Identification Number). This includes four character groups:
From the year of 1990 followed by the digits (Delta), from 2000 the week code has four digits. Often this code is attached only on a tire edge: For tires with a defined direction, this is usually the right flank, and with tire with a defined outside to find him there.
Age of new tires
The week code plays a small role in the assessment of used as well as longer supported "new" tires as playing an essential role in the adhesion of a tire next to the tire tread and condition and age of the rubber. From 10 years, partly already 6 years, experts warn against appreciably worse liability.
The six leading manufacturers are of the opinion that an unused tires - Proper storage provided - up to five years from date still to be regarded as new is and must be sold as new tires. Two North Rhine-Westphalian district courts have confirmed the five-year period for new tires.
Maximum age for trailers with 100-km/h-Zulassung
For supporters who have a 100 km / h approval after 9 Exemption Order of the German Highway Code, the legislator as a maximum age for the tires of the trailer before binding six years. Also only one tire exceeds the age limit, so goes the 100-km/h-Zulassung. The team leader should therefore check with you that no tire a DOT number has more than 6 years before he takes the special after the 9th exception regulation road traffic regulations to complete. For example, he has to curb with a tire with the marking 5102 as of 22 December 2008, the speed to 80 km / hr.