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2. Tire code - Wikipedia

   en.wikipedia.org/wiki/Tire_code

   1- or 2-digit/letter combination: Speed rating; see table below. Additional marks: see subheading below. As an example, if a tire size has two sets of numbers (6-12, 5.00-15, 11.2-24), then the first number (5.00-15) is the approximate width in inches, and the second number (5.00-15) is the rim diameter in inches.

3. 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 ]

4. Tire uniformity - Wikipedia

   en.wikipedia.org/wiki/Tire_uniformity

   As the tire rotates it may exert a lateral force on the order of 100 N (22 lbf), causing steering pull in one direction. It would be typical for the force to vary up and down from this value. A variation between 90 and 110 N (20 and 25 lbf) would be characterized as a 20 N (5 lbf) lateral force variation (LFV).

5. ISO 5775 - Wikipedia

   en.wikipedia.org/wiki/ISO_5775

   The inner width of the rim on which the tire is mounted should be about 65% of the tire's nominal section width for tires smaller than 30 mm and 55% for those larger. The section height of a tire is usually identical to its section width (for tires less than 28 mm, 2.5 mm have to be added to the width to get the height).

6. Spare tire - Wikipedia

   en.wikipedia.org/wiki/Spare_tire

   A spare tire allows a driver to replace a flat tire and drive on A Stepney rim. An early approach to providing a car with a spare tire Dual sidemounted spare tires behind the front fenders on a 1931 Nash Ambassador Temporary use "space-saver" spare tire mounted in the trunk of a 1970 AMC AMX with a single use air canister Full size spare tire mounted in cargo space area of a 1993 Jeep Grand ...

7. Low rolling resistance tire - Wikipedia

   en.wikipedia.org/wiki/Low_rolling_resistance_tire

   When measured by using these standard test practices, most new passenger tires have reported RRCs ranging from 0.007 to 0.014. [2] In the case of bicycle tires, values of 0.0025 to 0.005 are achieved. [3] These coefficients are measured on rollers, with power meters on road surfaces, or with coast-down tests.