Israeli inventor has backers for cardboard bicycle

(Phys.org)—Don't tell Izhar Gafni that a bicycle can't be made of cardboard. An Israeli engineer working in industrial design, he was always fascinated by the potential that comes from the interplay of technologies applied ...

Introducing Stringbike: the bike with no chain (w/ Video)

(PhysOrg.com) -- Hungarian bicycle designers have unveiled their new Stringbike in Padova, Italy. The design replaces the traditional chain with a symmetrical rope and pulley system, which they say is more efficient, makes ...

Gyrowheel to keep new bike riders upright (w/ Video)

(PhysOrg.com) -- A new device called the Gyrowheel could soon revolutionize the way children learn to ride bicycles, and they will be able to learn on their own, without training wheels, and in as little as half an hour.

Dutch launch 'intelligent bicycle' that warns of danger

The Netherlands on Monday launched its first-ever "intelligent bicycle", fitted with an array of electronic devices to help bring down the high accident rate among elderly cyclists in the bicycle-mad country.

The 'bricycle' dilemma - to steer or balance?

(Phys.org) —When you were learning to ride a bicycle you thought gravity was your enemy, trying to make you fall over. But without gravity, you wouldn't be able to steer, say Cornell engineers. To demonstrate the concept, ...

Bangkok designers draw attention for air-purifying bike idea

(Phys.org) —Some observers are calling it "the photosynthesis bike." The bike of interest is only a concept, not even a prototype yet, from designers in Bangkok. Nonetheless, in concept alone, it has captured a lot if imaginations, ...

Designer has DIY kit for turning objects into UAVs

(Phys.org) —When an independent designer comments that his interest is "in taking stuff away from the computer screen" and finding ways to interact with information in more interesting ways, then it is not unreasonable ...

Tin nanocrystals for the battery of the future

(Phys.org) —More powerful batteries could help electric cars achieve a considerably larger range and thus a breakthrough on the market. A new nanomaterial for lithium ion batteries developed in the labs of chemists at ETH ...

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Bicycle

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 automobiles. They are the principal means of transportation in many regions. They also provide a popular form of recreation, and have been adapted for such uses as children's toys, adult fitness, military and police applications, courier services, and competitive sports.

The basic shape and configuration of a typical bicycle has changed little since the first chain-driven model was developed around 1885. Many details have been improved, especially since the advent of modern materials and computer-aided design. These have allowed for a proliferation of specialized designs for particular types of cycling.

The invention of the bicycle has had an enormous impact on society, both in terms of culture and of advancing modern industrial usage. Several components that eventually played a key role in the development of the automobile were originally invented for the bicycle - e.g., ball bearings, pneumatic tires, chain-driven sprockets, spoke-tensioned wheels, etc.

This text uses material from Wikipedia, licensed under CC BY-SA