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2. Bicycle chain - Wikipedia

   en.wikipedia.org/wiki/Bicycle_chain

   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.

3. Bicycle helmet - Wikipedia

   en.wikipedia.org/wiki/Bicycle_helmet

   The bicycle helmet arm of Bell was split off in 1991 as Bell Sports Inc., having completely overtaken the motorcycle and motorsports helmet business. The first commercially successful purpose-designed bicycle helmet was the Bell Biker, a polystyrene-lined hard shell released in 1975.

4. List of bicycle parts - Wikipedia

   en.wikipedia.org/wiki/List_of_bicycle_parts

   Chainstay: a pair of tubes on a bicycle frame that runs from the bottom bracket to the rear fork ends; Chain tensioner: a device to maintain proper chain tension; Chaintug: a device to aid in setting the proper chain tension; Cluster: a bicycle cogset, either a freewheel, or cassette

5. Bicycle frame - Wikipedia

   en.wikipedia.org/wiki/Bicycle_frame

   Track frames have much in common with road and time trial frames, but come with horizontal, rear-facing, rear fork ends, [40] rather than dropouts, [41] to allow one to adjust the position of the rear wheel horizontally to set the proper chain tension. Rear hub spacing is 120 millimetres (4.7 in) rather than 130 millimetres (5.1 in) or more for ...

6. Glossary of cycling - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_cycling

   A bicycle with front suspension but no rear suspension. [7] Headset The bearing system in the head tube within which the handlebars rotate. [7] [22] Highracer A short wheel base recumbent bicycle with two large wheels, usually between 559 and 622 mm in size. The kind of recumbent most similar to normal road bikes in characteristics. [62] Hill ...

7. Bicycle gearing - Wikipedia

   en.wikipedia.org/wiki/Bicycle_gearing

   The third method, gain ratio, also takes the length of the crankarm into account, which can vary from bike to bike. The fourth method uses two numbers and is only useful in comparing bicycles with the same drive wheel diameter. In the case of road bikes, this is usually around 670 mm. A 700c "standard" wheel has a 622 mm rim diameter.