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  2. Bicycle handlebar - Wikipedia

    en.wikipedia.org/wiki/Bicycle_handlebar

    Cyclocross brake levers are sized to fit drop style bars, and would also not fit a mountain bike handlebar. The other common lever/grip size is used for mountain and city handlebars, including flat bars, riser bars, some porteur bars, etc. On these bars the lever and grip areas have a 22.2 mm (7 ⁄ 8 in) diameter. Hence, thumb shift levers ...

  3. Stem (bicycle part) - Wikipedia

    en.wikipedia.org/wiki/Stem_(bicycle_part)

    The ISO standard for the clamping area of a handlebar is 25.4 mm (1 inch), which is used on mountain bikes and many Japanese-made road handlebars. However, the Italian unofficial standard is 26.0 mm, which is the most common clamp size for road bars.

  4. Headset (bicycle part) - Wikipedia

    en.wikipedia.org/wiki/Headset_(bicycle_part)

    Any increase in handlebar height after this cut requires purchasing a new fork, a stem with more angular rise (some stems can be turned over for greater height), or a special adapter that clamps onto the steerer tube and gives a higher clamping position for the original stem.

  5. Bicycle - Wikipedia

    en.wikipedia.org/wiki/Bicycle

    A bicycle, also called a pedal cycle, bike, push-bike or cycle, is a human-powered or motor-assisted, pedal-driven, single-track vehicle, with two wheels attached to a frame, one behind the other. A bicycle rider is called a cyclist, or bicyclist. Bicycles were introduced in the 19th century in Europe. By the early 21st century there were more ...

  6. Carbon dioxide - Wikipedia

    en.wikipedia.org/wiki/Carbon_dioxide

    In Earth's atmosphere, carbon dioxide is a trace gas that plays an integral part in the greenhouse effect, carbon cycle, photosynthesis and oceanic carbon cycle. It is one of three main greenhouse gases in the atmosphere of Earth. The concentration of carbon dioxide (CO 2) in the atmosphere reached 427 ppm (0.04%) in 2024. [78]

  7. Motorcycle - Wikipedia

    en.wikipedia.org/wiki/Motorcycle

    A motorcycle (motorbike, bike, or, if three-wheeled, a trike) is a two or three-wheeled motor vehicle steered by a handlebar from a saddle-style seat. [ 1 ] [ 2 ] [ 3 ] Motorcycle designs vary greatly to suit a range of different purposes: long-distance travel, commuting , cruising , sport (including racing ), and off-road riding.

  8. Electric bicycle - Wikipedia

    en.wikipedia.org/wiki/Electric_bicycle

    A rise in incidents where e-bike batteries were implicated in fires has been attributed to increases in popularity and lack of regulations. [38] Lower-quality batteries are more likely to be manufactured with defects that can cause bulging or bursting, however, there is an incredibly low instance of issue among larger more established ...

  9. Energy density - Wikipedia

    en.wikipedia.org/wiki/Energy_density

    In physics, energy density is the quotient between the amount of energy stored in a given system or contained in a given region of space and the volume of the system or region considered.