Bicycle

A bicycle, or bike, is a pedal-driven land vehicle with two wheels attached to a frame, one behind the other. First introduced in 19th-century Europe, it evolved quickly into the familiar current design. With over one billion in the world today, bicycles provide the principal means of transportation in many regions and a popular form of recreation and transport in others.

External links

• BikeForums.net (2005). BikeForums. Retrieved March 30, 2005.
• Brown, Sheldon (2005). Extensive online bicycle glossary.
• Bryan (2004). Bryan's Bicycle Page. Retrieved March 30, 2005.
• Croydon Cycling Campaign (2003). Information & Help. Retrieved March 30, 2005.
• eHow, Inc. (2005). How to Make Your Bike the Perfect Fit. Retrieved March 30, 2005.
• Learn to Bicycle (2005). Learn to Bike, no training wheels.
• European Cyclists' Federation (2002). Cities for Cyclists. Retrieved March 30, 2005.
• Exploratorium (2004). Science of Cycling: Human Power. Retrieved March 30, 2005.
• Folding bikes, electric bikes, trailers, trikes and alternative transport Retrieved June 5, 2005
• Gray Matter Media (1995). The eJournal website Bicycle Touring Central. Retrieved March 30, 2005.
• Hashmi, Khurram (2004). Bicycle Safety: Road Hazards, Accident Prevention and Risk Mitigation. Retrieved March 30, 2005.
• Hudson, William (2003). Myths and Milestones in Bicycle Evolution. Retrieved March 30, 2005.
• Jelsoft Enterprises Ltd. (2005). CyclingForum.org. Retrieved March 30, 2005.
• Jones, David E. H. (1970). The Stability of the Bicycle. Scanned in copy for download for personal use.
• Killian, Michael (2004). SidewaysBike (Not Your Father's Bicycle) Retrieved March 30, 2005.
• Lessing, Hans-Erhard (1997). The Leonardo da Vinci Bicycle Hoax. Cycle Publishing. Retrieved March 30, 2005.
• Townsend, Andy (2005). Motorcycle Stability and Steering. Rider Education of New Jersey, Inc. Retrieved March 30, 2005.
• Transportation Alternatives (2005). The advocates for cycling, walking, and environmentally sensible transportation Retrieved March 30, 2005.
• Wachtel, Alan; Lewiston, Diana (2000). Risk Factors for Bicycle-Motor Vehicle Collisions at Intersections. Bicycling Life Website. Retrieved March 30, 2005.