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Discover the tire markings
In addition to the tire size and the service description, there are several different inscriptions on the tire sidewall.
This example shows a typical tubeless radial tire.
For all asymmetric products, it is important to fit the tire on the rim in the correct position. Asymmetric tread pattern designs are developed to offer the best performance considering the different behaviors of the external and internal areas of the tread design.
DOT (Department Of Transportation) is a legal marking required in many countries in order to sell the tires. DOT means that the tires meet or exceed the Department of Transportation’s safety standards.
1) Means tire meets or exceeds Department of Transportation safety standards
2) Manufacturer and Plant Code Number (Assigned by DOT)
3) Tire Size Code Number
4) Group of Optional Symbols for the Manufacturer ( To identify the brand or other significant characteristics of the tire)
5) Date of manufacture
When a tire bears the ECE symbol, it has been ECE certified and approved and meets ECE standards for physical dimensions, branding requirements and high speed endurance regulations. The marking is made up of the letter E and a number representing the country releasing the approval sheet, followed by a unique number combination for each product.
When a tire bears the European Noise Approved number, it is compliant with Directive 2001/43/EC and adheres to the new noise emission levels set for European countries.
UTQG is a standard defined by the DOT of the USA for grading the performances of tires in the areas of TREADWEAR, TRACTION and TEMPERATURE RESISTANCE. It applies only to car tires with a rim diameter larger than 13”, but not to winter tires.
TREADWEAR: The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified government test course. For example, a tire graded 150 would wear one and one-half times as well on the government course as a tire graded 100. The relative performance of tires depends upon the actual conditions of their use, however, and may depart significantly from the norm due to variations in driving habits, service practices and differences in road characteristics and climate.
TRACTION: The traction grades are AA, A, B, and C, from highest to lowest, respectively. These grades represent the tire's ability to stop on wet roads as measured under controlled conditions on specified government test surfaces of asphalt and concrete. A tire marked C may have poor traction performance. Caution: the traction grade assigned to the tire is based on straight-ahead braking traction tests and does not include acceleration, cornering, aquaplaning, or peak traction characteristics.
TEMPERATURE: The temperature grades, A (the highest), B, and C, represent the tire's resistance to the generation of heat and its ability to dissipate heat when tested under controlled conditions on a specified indoor laboratory test wheel. Sustained high temperatures can cause the material of the tire to degenerate and reduce tire life, and excessive temperature can lead to sudden tire failure. Grade C corresponds to a level of performance for which all passenger car tires must meet under the Federal Motor Safety Standard No. 109. Grades B and A represent higher levels of performance on the laboratory test wheel. Caution: the temperature grade for this tire is established for a tire that is properly inflated and not overloaded. Excessive speed, under inflated tires, or excessive loads, either separately or in combination can cause heat build-up and possible tire failure.
TWI is an important safety feature that indicates how much tread is left on a tire. Narrow bars of rubber are moulded at a height of 1.6 mm (2/32”) across the bottom of the tread grooves. When the tread wears down to these bars, the tire should be replaced.
Winter tires, also called snow, cold weather or thermal tires, are identified by the branding M+S (Mud&Snow) on the side of the tires together with the drawing of a mountain with a snowflake. The M+S marking alone is legally sufficient to identify a winter tire, but the tire industry has adopted the snowflake symbol to differentiate specifically winter tires (M+S and snowflake) from all-season tires (only M+S).