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2. Tire code - Wikipedia

   en.wikipedia.org/wiki/Tire_code

   If a tire size has three sets of numbers (15x6.00-6, 26x12.00-12, 31x15.50-15), then the first number (26x12.00-12) is the approximate tire diameter in inches, the second number (26x12.00-12) is the approximate width in inches, and the third number (26x12.00-12) is the rim diameter in inches.

3. Wheel sizing - Wikipedia

   en.wikipedia.org/wiki/Wheel_sizing

   Modern road tires have several measurements associated with their size as specified by tire codes like 225/70R14. The first number in the code (e.g., "225") represents the nominal tire width in millimeters. This is followed by the aspect ratio (e.g.,"70"), which is the height of the sidewall expressed as a percentage of the nominal tire width.

4. European Tyre and Rim Technical Organisation - Wikipedia

   en.wikipedia.org/wiki/European_Tyre_and_Rim...

   ETRTO sizes apply to rims and tyres for vehicles of all types, including bicycles. The great advantage of ETRTO sizing is that it is unambiguous; previously, nominal dimensions were used which were interpreted in different ways by different countries and manufacturers - a problem for the end user.

5. List of tire companies - Wikipedia

   en.wikipedia.org/wiki/List_of_tire_companies

   Panther Tyres [64] Pakistan: 1983 [65] Panther Tyres, Panther Tubes, Panther Lubricants, Panther Auto Parts Petlas Turkey: 1976 Petlas: Pirelli [66] [67] Italy: 1872 Agom, Courier, Metzeler, Pirelli, Formula [68] Ralf Bohle GmbH Germany: 1922 Schwalbe, Impac Rosava Ukraine: 1972 Rosava,Itegro Rupsha Tyres Bangladesh: 1991 Rupsha Asia, Tajwer ...

6. ISO 5775 - Wikipedia

   en.wikipedia.org/wiki/ISO_5775

   Part 1 considers tyres' nomenclature, size designation, marking, dimensions and compatibility with different rims and rim widths. Part 2 considers both general requirements and specific requirements for 5 sub types of rim: straight-sided, tubeless straight-sided, hooked bead, crochet type (not the same as hooked bead type), and tubeless crochet ...

7. Low rolling resistance tire - Wikipedia

   en.wikipedia.org/wiki/Low_rolling_resistance_tire

   Low rolling resistance tires are designed to reduce the energy loss as a tire rolls, decreasing the required rolling effort — and in the case of automotive applications, improving vehicle fuel efficiency as approximately 5–15% of the fuel consumed by a typical gas car may be used to overcome rolling resistance.