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  2. 27.5 mountain bike - Wikipedia

    en.wikipedia.org/wiki/27.5_Mountain_bike

    The wheel size is sometimes erroneously called "650B" [8] [9] as a "marketing term" by some manufacturers for their 27.5", but the 650B size has traditionally been a designation for a 26 inch diameter (ISO ~ 40-584 demi-ballon tire) using the same ISO 584 mm rim [10] used by French tandems, Porteurs and touring bicycles.

  3. 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).

  4. Bicycle tire - Wikipedia

    en.wikipedia.org/wiki/Bicycle_tire

    For example, if a fat-bike tire is inflated to 0.5 bar (50 kPa; 7.3 psi) gauge pressure at room temperature 20 °C (68 °F) and then the temperature is decreased to −10 °C (14 °F) (a 9% decrease in absolute temperature), the absolute pressure of 1.5 bar (150 kPa; 22 psi) will be decreased by 9% to 1.35 bar (135 kPa; 19.6 psi), which ...

  5. History of the bicycle - Wikipedia

    en.wikipedia.org/wiki/History_of_the_bicycle

    BMX bikes are specially designed bicycles that usually have 16 to 24-inch wheels (the norm being the 20-inch wheel), which originated in the state of California in the early 1970s when teenagers imitated their motocross heroes on their bicycles. [71] Children were racing standard road bikes off-road, around purpose-built tracks in the ...

  6. Bicycle wheel - Wikipedia

    en.wikipedia.org/wiki/Bicycle_wheel

    ISO 47-622 (28 ⋅ 1 + 3 ⁄ 4) through ISO 60-622 (29 × 2.35). The 28 × 2.00, ISO 50-622 onwards, as a marketing term for wide tires for mountain bikes, are known as 29 inch for their larger wheel diameter and measured in decimal sizes.

  7. Tire code - Wikipedia

    en.wikipedia.org/wiki/Tire_code

    The tire diameter is given for High Flotation tires and omitted from Numeric tires. 2-digit number: The diameter of the tire in inches. x: Separator character. 3- or 4-digit number: The section width (cross-section) of the tire in inches. If the tire diameter is not given, section widths ending in zero (e.g., 7.00 or 10.50) indicate the aspect ...