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  1. Tire maintenance - Wikipedia

    en.wikipedia.org/wiki/Tire_maintenance

    When the tread depth becomes too shallow, like for example below 3.2 mm (4/32 in), the tire is worn out and should be replaced. The same rims can usually be used throughout the lifetime of the car. Other problems encountered in tire maintenance include: Uneven or accelerated tire wear: can be caused by under-inflation, overloading or poor wheel ...

  2. Tire code - Wikipedia

    en.wikipedia.org/wiki/Tire_code

    The DOT code [1] is an alphanumeric character sequence molded into the sidewall of the tire and allows the identification of the tire and its age. The code is mandated by the U.S. Department of Transportation [2] but is used worldwide. [3] The DOT code is also useful in identifying tires subject to product recall [4] or at end of life due to age.

  3. Tire tread - Wikipedia

    en.wikipedia.org/wiki/Tire_tread

    The tread of a tire or track refers to the rubber on its circumference that makes contact with the road or the ground. As tires are used, the tread is worn off, limiting its effectiveness in providing traction. A worn tire can often be retreaded . The word tread is often used casually to refer to the pattern of grooves molded into the rubber ...

  4. Uniform Tire Quality Grading - Wikipedia

    en.wikipedia.org/wiki/Uniform_Tire_Quality_Grading

    UTQG ratings (top) and tire code (bottom) on sidewall of Continental ContiProContact tire. Uniform Tire Quality Grading, commonly abbreviated as UTQG, is a set of standards for passenger car tires that measures a tire's treadwear, temperature resistance and traction. The UTQG was created by the National Highway Traffic Safety Administration in ...

  5. Retread - Wikipedia

    en.wikipedia.org/wiki/Retread

    Retread, also known as "recap", or a "remold" is a re-manufacturing process for tires that replace the tread on worn tires. [1][2] Retreading is applied to casings of spent tires that have been inspected and repaired. [3] It preserves about 90% of the material in spent tires and the material cost is about 20% compared to manufacturing a new one.

  6. Tire - Wikipedia

    en.wikipedia.org/wiki/Tire

    As the ratio of tire tread ... Indicators have been required on all new tires ... this is often defined when the groove depth is approximately 1.5 or 1.6 mm (2/32 ...