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  2. Tire maintenance - Wikipedia

    en.wikipedia.org/wiki/Tire_maintenance

    Tread worn away completely: especially when the wear on the outer rubber exposes the reinforcing threads within, the tire is said to be bald and must be replaced as soon as possible. Sometimes tires with worn tread are recapped, i.e. a new layer of rubber with grooves is bonded onto the outer perimeter of a worn tire. Since this bonding may ...

  3. Tire uniformity - Wikipedia

    en.wikipedia.org/wiki/Tire_uniformity

    Tire forces are divided into three axes: radial, lateral, and tangential (or fore-aft). The radial axis runs from the tire center toward the tread, and is the vertical axis running from the roadway through the tire center toward the vehicle. This axis supports the vehicle's weight. The lateral axis runs sideways across the tread.

  4. Transportation Recall Enhancement, Accountability and ...

    en.wikipedia.org/wiki/Transportation_Recall...

    The Transportation Recall Enhancement, Accountability and Documentation or TREAD Act (Pub. L. 106–414 (text)) is a United States federal law enacted in the fall of 2000. This law intended to increase consumer safety through mandates assigned to the National Highway Traffic Safety Administration (NHTSA).

  5. Uniform Tire Quality Grading - Wikipedia

    en.wikipedia.org/wiki/Uniform_Tire_Quality_Grading

    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 1978, a branch of the United States Department of Transportation (DOT). [ 1 ]

  6. Vehicle inspection in the United States - Wikipedia

    en.wikipedia.org/wiki/Vehicle_inspection_in_the...

    Vehicle emissions inspection station in Wisconsin. Arizona – biennially, in Phoenix and Tucson metro areas only, depending on age and type of vehicle. [28]California – biennially for all vehicles from out-of-state, regardless of age; and all vehicles made after 1975 which are more than six years old in all or some zip codes in 41 out of 58 counties.

  7. Retread - Wikipedia

    en.wikipedia.org/wiki/Retread

    Retread (also known as recap or 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.

  8. Tire-pressure monitoring system - Wikipedia

    en.wikipedia.org/wiki/Tire-pressure_monitoring...

    A tire-pressure monitoring system (TPMS) monitors the air pressure inside the pneumatic tires on vehicles. [1] A TPMS reports real-time tire-pressure information to the driver, using either a gauge, a pictogram display, or a simple low-pressure warning light. TPMS can be divided into two different types – direct (dTPMS) and indirect (iTPMS).

  9. Tire balance - Wikipedia

    en.wikipedia.org/wiki/Tire_balance

    Foreign material, such as road tar, stones, ice, or snow, that is stuck in a tire's tread or otherwise adhered to the tire or wheel may also cause a temporary unbalance and subsequent vibration. Uneven weight distribution in the wheel and tire assembly can result from manufacturing inaccuracies, uneven tread wear, damage over time, or improper ...

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