van Lierop Grimsrud El-Geneidy (2015). "Breaking into bicycle theft: Insights from Montreal, Canada" (PDF). International Journal of Sustainable Transportation . Retrieved 30 September 2015. Designed, engineered and made in Australia, our pumps are the smallest, fastest and lightest on the market.

Bicycle - Wikipedia

A bicycle stays upright while moving forward by being steered so as to keep its center of mass over the wheels. [47] This steering is usually provided by the rider, but under certain conditions may be provided by the bicycle itself. [48] The Wrights' bicycle shop". 2007. Archived from the original on 25 January 2007 . Retrieved 5 February 2007. There are several hundred assisted-service Community Bicycle Organizations worldwide. [74] At a Community Bicycle Organization, laypeople bring in bicycles needing repair or maintenance; volunteers teach them how to do the required steps.Gliemann, Jennifer (21 March 2017). "200th anniversary: How the bicycle changed society". Bike Citizens . Retrieved 29 March 2020. Damien Newton (16 October 2008). "Metro Making Room for Bikes on Their Trains". LA.StreetsBlog.Org . Retrieved 12 February 2010. Historically, materials used in bicycles have followed a similar pattern as in aircraft, the goal being high strength and low weight. Since the late 1930s alloy steels have been used for frame and fork tubes in higher quality machines. By the 1980s aluminum welding techniques had improved to the point that aluminum tube could safely be used in place of steel. Since then aluminum alloy frames and other components have become popular due to their light weight, and most mid-range bikes are now principally aluminum alloy of some kind. [ where?] More expensive bikes use carbon fibre due to its significantly lighter weight and profiling ability, allowing designers to make a bike both stiff and compliant by manipulating the lay-up. Virtually all professional racing bicycles now use carbon fibre frames, as they have the best strength to weight ratio. A typical modern carbon fiber frame can weighs less than 1 kilogram (2.2lb). Bamboo bicycles made in Zambia (TV news). Tokyo: NHK World News in English. 14 January 2013. Archived from the original on 15 January 2013. Bicycle brakes may be rim brakes, in which friction pads are compressed against the wheel rims; hub brakes, where the mechanism is contained within the wheel hub, or disc brakes, where pads act on a rotor attached to the hub. Most road bicycles use rim brakes, but some use disk brakes. [64] Disc brakes are more common for mountain bikes, tandems and recumbent bicycles than on other types of bicycles, due to their increased power, coupled with an increased weight and complexity. [65] A front disc brake, mounted to the fork and hub

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Bulletin des lois de la République française (1873) 12th series, vol. 6, p. 648, patent no. 86,705: "Perfectionnements dans les roues de vélocipèdes" ("Improvements in the wheels of bicycles"), issued 4 August 1869. Broekaert, Joel & Kist, Reinier (12 February 2010). "So many bikes, so little space". NRC Handelsblad. Archived from the original on 13 February 2010 . Retrieved 13 February 2010. How Much Do Bicycles Pollute? Looking at the Carbon Dioxide Produced by Bicycles". Kenkifer.com. 20 November 1999. Archived from the original on 15 November 2011 . Retrieved 24 October 2011. The wheel axle fits into fork ends in the frame and fork. A pair of wheels may be called a wheelset, especially in the context of ready-built "off the shelf", performance-oriented wheels. Shaheen, Susan; Guzman, Stacey; Zhang, Hua (2010). "Bikesharing in Europe, the Americas, and Asia". Transportation Research Record. 2143: 159–67. doi: 10.3141/2143-20. S2CID 40770008.

Bachynski, Kathleen; Bateman-House, Alison (2020). "Mandatory Bicycle Helmet Laws in the United States: Origins, Context, and Controversies". American Journal of Public Health. 110 (8): 1198–1204. doi: 10.2105/AJPH.2020.305718. PMC 7349454. PMID 32552017. Francois Bougo (26 May 2010). "Beijing looks to revitalise bicycle culture". Agence France-Presse. Archived from the original on 31 May 2010. Bicycles offer an important mode of transport in many developing countries. Until recently, bicycles have been a staple of everyday life throughout Asian countries. They are the most frequently used method of transport for commuting to work, school, shopping, and life in general. In Europe, bicycles are commonly used. [85] They also offer a degree of exercise to keep individuals healthy. [86] The word bicycle first appeared in English print in The Daily News in 1868, to describe "Bysicles and trysicles" on the "Champs Elysées and Bois de Boulogne". [11] The word was first used in 1847 in a French publication to describe an unidentified two-wheeled vehicle, possibly a carriage. [11] The design of the bicycle was an advance on the velocipede, although the words were used with some degree of overlap for a time. [11] [12]