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  2. Gear inches - Wikipedia

    en.wikipedia.org/wiki/Gear_inches

    Simplified diagram of gear inches: As the rear sprocket is halfed in size, the distance traveled by the rear wheel doubles, at half the torque. Gear inches is an imperial measure corresponding to the diameter in inches of the drive wheel of a penny-farthing bicycle with equivalent (direct-drive) gearing.

  3. Bicycle gearing - Wikipedia

    en.wikipedia.org/wiki/Bicycle_gearing

    The epicyclic gears used within hub gears have more scope for varying the number of teeth than do derailleur sprockets, so it may be possible to get much closer to the ideal of consistent relative differences, e.g. the Rohloff Speedhub offers 14 speeds with an average relative difference of 13.6% and individual variations of around 0.1%.

  4. Sprocket - Wikipedia

    en.wikipedia.org/wiki/Sprocket

    The sprocket wheels a, b, and c engage and transport the film. a and b move with uniform velocity and c indexes each frame of the film into place for projection. Sprockets are used in the film transport mechanisms of movie projectors and movie cameras. [5] In this case, the sprocket wheels engage film perforations in the film stock.

  5. Bicycle chain - Wikipedia

    en.wikipedia.org/wiki/Bicycle_chain

    Fixed sprockets and freewheels are also available in 3 ⁄ 32 in (2.4 mm) widths, so fixed-gear and single-speed bikes can be set up to use the narrower and lighter 3 ⁄ 32 in (2.4 mm) chains.) 1 ⁄ 8 in (3.2 mm) chains are typically used on bikes with a single rear sprocket: those with coaster brakes , hub gears , fixed gears such as track ...

  6. Retro-direct - Wikipedia

    en.wikipedia.org/wiki/Retro-direct

    Usually the second sprocket is larger, which provides the cyclist a lower gear for climbing steep inclines simply by pedaling backwards. While most historical examples of retro-direct bicycles used the reverse gear for climbing, several modern retro-direct riders prefer pedalling forward when standing to accelerate from rest and climb, and ...

  7. Roller chain - Wikipedia

    en.wikipedia.org/wiki/Roller_chain

    Roller chain and sprocket The sketch of roller chain, Leonardo da Vinci, Codex Atlanticus. Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire- and tube-drawing machines, printing presses, cars, motorcycles, and bicycles.

  8. U2's Larry Mullen Jr. says dyscalculia affects his drumming ...

    www.aol.com/u2s-larry-mullen-jr-says-211302785.html

    Uber giving out free month of rides for teens who fail their driver's test. Finance. Yahoo Finance. Stocks are priced for 'perfection' and more vulnerable to a correction, Goldman warns.

  9. Hyperglide - Wikipedia

    en.wikipedia.org/wiki/Hyperglide

    The individual sprockets on a Hyperglide cassette or freewheel are designed specifically to work with their neighbours. [3] For example, the 18-tooth sprocket on a wide-range cassette (such as one for a mountain bike) will have a different ramp pattern than the 18-tooth sprocket on a narrow-range cassette, because the number of teeth on the neighbouring sprocket requires a different ramp ...

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