A bicycle, bike, or cycle is a pedal-driven, human-powered vehicle with two wheels attached to a frame, one behind the other. A person who rides a bicycle is called a cyclist or a bicyclist..

Bicycles were introduced in the 19th century and now number about one billion worldwide, twice as many as motorcars.[1]

1. Mountain Bike

2. Road Bike

3. Trials Bike

4. 29er

5. Track Bike

6. Hybrid

1. 1. ^ DidYouKnow.cd. There are about a billion or more bicycles in the world. Retrieved 30 July 2006.

• MAKE: Blog: Bicycles revolt and succumb to art (November 6, 2008)