![]() The number in the circle or rectangle denotes the country code of the government that granted the type approval. A (lower case) "e" indicates that the tire is certified to comply with the dimensional, performance and marking requirements of Directive 92/23/EEC. An (upper case) "E" indicates that the tire is certified to comply with the dimensional, performance and marking requirements of ECE regulation 30. The mark itself is either an upper case "E" or lower case "e" – followed by a number in a circle or rectangle, followed by a further number. E-mark Īll tires sold for road use in Europe after July 1997 must carry an E-mark. ![]() Canada has published tire regulations, such as the Motor Vehicle Tire Safety Regulations SOR 95-148. In the United States, the Office of Vehicle Safety Compliance, a component of the Department of Transportation, is one of the agencies tasked to enforce the Federal Motor Vehicle Safety Standard (FMVSS). The Tire and Rim Association, formerly known as The Tire and Rim Association of America, Inc., is an American trade organization which standardizes technical standards. The objectives of the ETRTO include aligning national tire and rim standards in Europe. The European Tyre and Rim Technical Organisation (ETRTO) and the Tire and Rim Association (TRA) are two organizations that influence national tire standards. In addition, it is a requirement for all tyres on these vehicles to display a legible date code. The ban also applies to all tyres in single configuration on minibuses. Since 1st February 2021 UK vehicle Regulations do not permit the use of tyres over 10 years old on the front steered axle(s) of heavy goods vehicles, buses and coaches. The DOT code is also useful in identifying tires subject to product recall or at end of life due to age. Department of Transportation but is used worldwide. The DOT code is an alphanumeric character sequence molded into the sidewall of the tire and allows the identification of the tire and its age. Main article: Tire § Regulation DOT code National technical standards regulations ![]() ![]() However, some pickup trucks and SUVs use the Light Truck Numeric or Light Truck High Flotation system. Most tires sizes are given using the ISO metric sizing system. New automotive tires frequently have ratings for traction, treadwear, and temperature resistance, all collectively known as the Uniform Tire Quality Grading. The code has grown in complexity over the years, as is evident from the mix of SI and USC units, and ad-hoc extensions to lettering and numbering schemes. Sometimes the inner sidewall contains information not included on the outer sidewall, and vice versa. This code specifies the dimensions of the tire, and some of its key limitations, such as load-bearing ability, and maximum speed. Assorted new car tires with a variety of tread patterns and different sizesĪutomotive tires are described by an alphanumeric tire code (in North American English) or tyre code (in Commonwealth English), which is generally molded into the sidewall of the tire. ![]()
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