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The word was first used in 1847 in a French publication to describe an unidentified two-wheeled vehicle, possibly a carriage. These have allowed for a proliferation of specialized designs for many types of cycling. Doublet of chakra, chakram, charkha, chukker, cyclus, and wheel (see there for more). Definition of cycle noun from the Oxford Advanced Learner's Dictionary Rather than seeking to control or overexploit the environment, they adapted to its seasonal cycles and used periodic flooding as an opportunity. The second is evidence of a positive feedback cycle in which these fractures increased ice acceleration, which in turn caused further damage.
A bicycle stays upright while moving forward by being steered so as to keep its center of mass over the wheels. It became the biggest bicycle manufacturing company in the world, making over two million bikes per year. These bicycles were difficult to ride due to their high seat and poor weight distribution.
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Different gears and ranges of gears are appropriate for different people and styles of cycling. These are toothed and work much the same as a chain—popular with commuters and long distance cyclists they require little maintenance. In reality, many gears overlap or require the chain to run diagonally, so the number of usable gears is fewer.
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Furthermore, it was considered "unladylike" for women to open their legs to mount and dismount—in more conservative times women who rode bicycles at all were vilified as immoral or immodest. The rear triangle consists of the seat tube and paired chain stays and seat stays. If the rider is sitting upright, the rider's body creates about 75% of the total drag of the bicycle/rider combination. From a mechanical viewpoint, up to 99% of the energy delivered by the rider into the pedals is transmitted to the wheels, although the use of gearing mechanisms may reduce this by 10–15%. Short-wheelbase or tall bicycles, when braking, can generate enough stopping force at the front wheel to flip longitudinally. Soon, the seat tube was added, which created the modern bike's double-triangle diamond frame.
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To add cycle to a word list please sign up or log in. Derivative of cycle entry 1
In Copenhagen, a cyclists' organization runs a Cycling Embassy that promotes biking for commuting and sightseeing. There are also cycling-specific multi-tools that combine many of these implements into a single compact device. Some brands of tires are much more puncture-resistant than others, often incorporating one or more layers of Kevlar; the downside of such tires is that they may be heavier and more difficult to fit and remove. A patch kit may be employed to fix the puncture or the tube can be replaced, though the latter solution comes at a greater cost and waste of material. Over the longer term, tires do wear out, after 2,000 to 5,000 miles (3,200 to 8,000 km); a rash of punctures is often the most visible sign of a worn tire. Most of the bearings on a modern bike are sealed and grease-filled and require little or no attention; such bearings will usually last for 10,000 miles (16,000 km) or more.
It is regarded as the first bicycle and von Drais is seen as the "father of the bicycle", but it did not have pedals. The "dandy horse", also called Draisienne or Laufmaschine ("running machine"), was the first human means of transport to use only two wheels in tandem and was invented by the German Baron Karl von Drais. The design of the bicycle was an advance on the velocipede, although the words were used with some degree of overlap for a time. 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". The bicycle's invention has had an enormous effect on society, both in terms of culture and of advancing modern industrial methods. Bicycles are popular targets for theft, due to their value and ease of resale.
In many jurisdictions, it is an offense to use a bicycle that is not in a roadworthy condition. They all experience the freedom and the natural opportunity for exercise that the bicycle easily provides. Ivan Illich stated that bicycle use extended the usable physical environment for people, while alternatives such as cars and motorways degraded and confined people's environment and mobility. (Ballantine, 1972) The bicycle is an inexpensive, fast, healthy and environmentally friendly mode of transport. One of the profound economic implications of bicycle use is that it liberates the user from motor fuel consumption. In line with the European financial crisis of that time, in 2011 the number of bicycle sales in Italy (1.75 million) passed the number of new car sales.
- A recumbent bicycle has a reclined chair-like seat that some riders find more comfortable than a saddle, especially riders who suffer from certain types of seat, back, neck, shoulder, or wrist pain.
- Most bicycles have serial numbers that can be recorded to verify identity in case of theft.
- Most of the bearings on a modern bike are sealed and grease-filled and require little or no attention; such bearings will usually last for 10,000 miles (16,000 km) or more.
- Bicycle lights, reflectors, and helmets are required by law in some geographic regions depending on the legal code.
A pair of wheels may be called a cyclebar south tampa wheelset, especially in the context of ready-built "off the shelf", performance-oriented wheels. Without a freewheel, coasting is impossible, so when the rear wheel is moving, the cranks are moving. A rear hub brake may be either hand-operated or pedal-actuated, as in the back pedal coaster brakes which were popular in North America until the 1960s. Upright handlebars, the norm in Europe and elsewhere until the 1970s, curve gently back toward the rider, offering a natural grip and comfortable upright position. The handlebars connect to the stem that connects to the fork that connects to the front wheel, and the whole assembly connects to the bike and rotates about the steering axis via the headset bearings.
A number of formal and industry standards exist for bicycle components to help make spare parts exchangeable and to maintain a minimum product safety. Bike trainers are used to enable cyclists to cycle while the bike remains stationary. Training wheels are sometimes used when learning to ride, but a dedicated balance bike teaches independent riding more effectively. Front-mounted baskets, front or rear luggage carriers or racks, and panniers mounted above either or both wheels can be used to carry equipment or cargo.
(RIDE BIKE)
Track bicycles do not have brakes, because all riders ride in the same direction around a track which does not necessitate sharp deceleration. With comfort bikes and hybrids, cyclists sit high over the seat, their weight directed down onto the saddle, such that a wider and more cushioned saddle is preferable. Some, mainly utility, bicycles use hub gears with between 3 and 14 ratios, but most use the generally more efficient dérailleur system, by which the chain is moved between different cogs called chainrings and sprockets to select a ratio. Virtually all professional racing bicycles now use carbon fibre frames, as they have the best strength to weight ratio. 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.