Reports by San Francisco Exploratorium

The Science of Cycling is a large Web site - there are over 20 pages in six main sections, 20 audio and video clips, interactive javascripts, and lots of images.

• Introduction -- What is the Science of Cycling?
• The Wheel -- Why do road bikes have thin tires, while mountain bikes have fat tires?
• Drives & Gears -- How do gears help make the bicycle so efficient?
• Frames & Materials -- What are the best materials for frames?
• Braking & Steering -- How do you stop and steer a bicycle?
• Aerodynamics -- How does drafting help a cyclist?
• Human Power -- Why is the bicycle the most efficient way to travel?