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  2. Bicycle gearing - Wikipedia

    en.wikipedia.org/wiki/Bicycle_gearing

    There are two chainrings whose relative difference (say 10%) is about half the relative step on the cogset (say 20%). This was used in the mid-20th century when front derailleurs could only handle a small step between chainrings and when rear cogsets only had a small number of sprockets, e.g. chainrings 44-48 and cogset 14-17-20-24-28.

  3. Sprocket - Wikipedia

    en.wikipedia.org/wiki/Sprocket

    16 tooth sprocket. Do = Sprocket diameter. Dp = Pitch diameter A sprocket and roller chain. A sprocket, [1] sprocket-wheel [2] or chainwheel is a profiled wheel with teeth that mesh with a chain, rack or other perforated or indented material. [3] [4] The name 'sprocket' applies generally to any wheel upon which radial projections engage a chain ...

  4. Derailleur - Wikipedia

    en.wikipedia.org/wiki/Derailleur

    The rear derailleur has two functions: it moves the chain between rear sprockets while taking up chain slack caused by moving to a smaller sprocket at the rear or a smaller chainring by the front derailleur. In order to accomplish this second task, it is positioned in the path of the bottom, slack portion of chain.

  5. Cogset - Wikipedia

    en.wikipedia.org/wiki/Cogset

    10-speed bicycle cassette. On a bicycle, the cassette or cluster [1] is the set of multiple sprockets that attaches to the hub on the rear wheel.A cogset works with a rear derailleur to provide multiple gear ratios to the rider.

  6. Crankset - Wikipedia

    en.wikipedia.org/wiki/Crankset

    Cranks designed to mount three chainrings will almost always use two different bolt circle diameters; the larger to mount the two bigger, outer rings and the smaller to mount the smaller, inner ring. Most modern two-chainring cranks use either a 110 or 130 mm (4.3 or 5.1 in) bolt circle diameter. Bolt circle diameters of common cranks:

  7. 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 ...

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