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Bicycle chains Roller chain and sprocket. A bicycle chain is a roller chain that transfers power from the pedals to the drive-wheel of a bicycle, thus propelling it.Most bicycle chains are made from plain carbon or alloy steel, but some are nickel-plated to prevent rust, or simply for aesthetics.
Basket: it is an optional attachment on a bike and is used for carrying things; Bearing: a device that facilitates rotation by reducing friction; Bell: an audible device for warning pedestrians and other cyclists; Belt-drive: alternative to chain-drive; Bicycle brake cable: see Cable; Bottle cage: a holder for a water bottle
The sprocket on the hub is made for standard-pitch derailleur-type bicycle chains 1 ⁄ 2 by 3 ⁄ 32 inch (12.7 mm × 2.4 mm) (ISO 082) and is offered with different numbers of teeth, like 13/15/16/17. The 15-, 16-, and 17-tooth sprockets are reversible, offering double sprocket life once the sprocket is worn out in one direction.
In the case of bicycle chains, it is possible to modify the overall gear ratio of the chain drive by varying the diameter (and therefore, the tooth count) of the sprockets on each side of the chain. This is the basis of derailleur gears. A multi-speed bicycle, by providing two or three different-sized driving sprockets and up to 12 (as of 2018 ...
A small wheel bicycle, such as a Moulton Bicycle, has a traditional seating position and small wheels. A portable bicycle, such as a Strida, is a folding bicycle that is small and light enough to be easily carried afoot or in a cramped vehicle. An exercise bicycle remains stationary; it is used for exercise rather than propulsion.
38.1 mm (1 + 1 ⁄ 2 in), as used in the OnePointFive International Standard. Cannondale Headshok. Although a Headshok steerer is close to 38.1 mm (1 + 1 ⁄ 2 in) it is actually 39.7 mm (1 + 9 ⁄ 16 in). The headtube dimensions for 38.1 mm (1 + 1 ⁄ 2 in) and Headshok are very similar, differing only in the minimum press depth.
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