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Through-axle
A quick release skewer is a mechanism for attaching a wheel to a bicycle. It consists of a rod threaded on one end and with a lever operated cam assembly on the other. The rod is inserted into the hollow axle of the wheel, a special nut is threaded on, and the lever is closed to tighten the cam and secure the wheel to the fork. Wheels equipped with quick release mechanisms can be removed from the bicycle frame and replaced without using tools by opening and closing the cam lever, thus more quickly than wheels with solid axles and nuts. On the negative side, a quick-release hub renders a wheel more vulnerable to theft and care must be taken to ensure that the mechanism is properly tightened. Similar quick-release mechanisms are also used to operate seatpost clamps, and the collapsing stem of folding bicycles and kick scooters. History The mechanism was invented in 1927 by Tullio Campagnolo, an Italian bicycle racer. He was frustrated when he attempted to change gears during a r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bicycle Brake Systems
A bicycle brake reduces the speed of a bicycle or prevents the wheels from moving. The two main types are: #Rim brakes, rim brakes and #Disc brakes, disc brakes. Drum brakes are less common on bicycles. Most bicycle brake systems consist of three main components: a mechanism for the rider to apply the brakes, such as #Brake levers, brake levers or Bicycle pedal, pedals; a mechanism for transmitting that signal, such as Bowden cables, hydraulic hoses, #Rod-actuated brakes, rods, or the bicycle chain; and the brake mechanism itself, a #Rim brakes, caliper or #Drum brakes, drum, to press two or more surfaces together in order to convert, via friction, kinetic energy of the bike and rider into thermal energy to be Dissipation, dissipated. History Karl Drais included a pivoting brake shoe that could be pressed against the rear iron tyre of his 1817 . This was continued on the earliest bicycles with pedals, such as the Boneshaker (bicycle)#Boneshaker, boneshaker, which were fitted with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bicycle Parts
List of bicycle parts by alphabetic order: * Axle: as in the generic definition, a rod that serves to attach a wheel to a bicycle and provides support for bearings on which the wheel rotates, for example a through-axle or an axle made for a quick release skewer. Also sometimes used to describe suspension components, for example a swing arm pivot axle * Bar ends: extensions at the end of straight handlebars to allow for multiple hand positions * Bicycle handlebar#Plugs, Bar plugs or end caps: plugs for the ends of handlebars * Bicycle basket, Basket: it is an optional attachment on a bike and is used for carrying things * Bearing (mechanical), Bearing: a device that facilitates rotation by reducing friction * Bicycle bell, Bell: an audible device for warning pedestrians and other cyclists * Belt-driven bicycle, Belt-drive: alternative to chain-drive * Bicycle brake cable: see Cable * Bottle cage: a holder for a water bottle * Bottom bracket: The bearing system that the pedals (a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bicycle Wheel
A bicycle wheel is a wheel, most commonly a wire wheel, designed for a bicycle. A pair is often called a wheelset, especially in the context of ready built "off the shelf" performance-oriented wheels. Bicycle wheels are typically designed to fit into the bicycle frame, frame and bicycle fork, fork via Dropout (bicycle part), dropouts, and hold bicycle tires. Invention The first wheel to use the tension in wire wheel, metal spokes was invented by George Cayley, Sir George Cayley to achieve lightness in his 1853 glider. Construction The first bicycle wheels followed the traditions of carriage building: a wooden hub, a fixed steel axle (the bearings were located in the fork ends), wooden spokes and a shrink fitted iron tire. A typical modern wheel has a metal hub, wire tension spokes and a metal or carbon fiber rim which holds a pneumatic rubber tire. Hub A hub is the center part of a bicycle wheel. It consists of an axle, bearing (mechanical), bearings and a hub shell. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Derailleur Hanger
A fork end, fork-end, or forkend is a slot in a bicycle frame or bicycle fork where the axle of a bicycle wheel is attached. A dropout is a type of fork end that allows the rear wheel to be removed without first derailing the chain. Track bicycle frames have track fork ends, on which the opening faces rearwards. Because they do not have dropouts, the chain must be derailed from the sprocket before the rear wheel can be removed from a typical track bike. Some single-speed bicycles intended for street or trail use are also equipped with track fork ends instead of dropouts. On bicycles that do not have a derailleur or other chain tensioning device, rear ''horizontal dropouts'' allow adjustment of chain tension, and can accommodate a range of chain lengths or cog sizes. They were standard on most older derailleur bicycles from before the 1990s. An older derailleur-equipped bicycle with horizontal dropouts can be readily converted into singlespeed, fixed gear or to use an internally ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quick Release Scewer
Quick, as an adjective, refers to something moving with high speed. Quick may also refer to: In business * Quick (restaurant), a Belgian fast-food restaurant chain * Quick (sportswear), a Dutch manufacturer of sportswear * Quick (automobile), an early American automobile Music * The Quick (American band), a rock band from Los Angeles * The Quick (British band), a pop band from England * Quick (dance group), a hip hop dance group * Quick (album), ''Quick'' (album), a 1994 independently released album by Far Films * Quick (1932 film), ''Quick'' (1932 film), a German film starring Lilian Harvey * ''Quick'', a 1993 American crime film starring Teri Polo * Quick (2011 film), ''Quick'' (2011 film), a South Korean film * Quick (2019 film), ''Quick'' (2019 film), also known as ''The Perfect Patient'', a Swedish film Publications * Quick (German magazine), ''Quick'' (German magazine), published 1948–1992 * Quick (newspaper), ''Quick'' (newspaper), a defunct free weekly tabloid in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Road Bicycle Racing
Road bicycle racing is the cycle sport discipline of road cycling, held primarily on Road surface, paved roads. Road racing is the most popular professional form of bicycle racing, in terms of numbers of competitors, events and spectators. The two most common competition formats are mass start events, where riders start simultaneously (though sometimes with a Handicapping, handicap) and race to a set finish point; and time trials, where individual time trial, individual riders or team time trial, teams race a course alone against the clock. Stage races or "tours" take multiple days, and consist of several mass-start or time-trial stages ridden consecutively. Professional racing originated in Western Europe, centred in France, Spain, Italy and the Low Countries. Since the mid-1980s, the sport has diversified, with races held at the professional, semi-professional and amateur levels, worldwide. The sport is governed by the (UCI). As well as the UCI's annual UCI Road World Champio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bolt (fastener)
A bolt is an externally helical threaded fastener capable of being tightened or released by a twisting force ( torque) to a matching nut. The bolt has an external male thread requiring a matching nut with a pre-formed female thread. History Nuts and bolts were originally hand-crafted together, so that each nut matched its own bolt, but they were not interchangeable. This made it virtually impossible to replace lost or damaged fixers, as they were all different. Joseph Whitworth in 1841 proposed that a standard should be set, but it did not happen immediately. In 1851 the Great Exhibition of the Works of Industry of All Nations was to be held in Hyde Park, London, England, and it was decided to build the Crystal Palace as part; this had to be done in 190 days, and at reasonable cost. Research into the remains of the destroyed building in 2024 revealed a major innovation that made this possible. The construction firm responsible, Fox Henderson, decided to use nuts and bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bicycle Lock
A bicycle lock is a security device used to deter bicycle theft, either by simply locking one of the wheels or by fastening the bicycle to a fixed object, e.g., a bike rack. Locking devices vary in size and security, the most secure tending to be the largest, heaviest and least portable. Thus, like other security equipment, bicycle locks must balance the competing interests of security, portability, and cost. Some are made of particularly expensive materials chosen for their acceptable strength and low density. Types U-locks and D-locks A U-lock is a rigid metal ring in the shape of the letter U. The U part of the lock attaches to a crossbar section, and for this reason they are also called ''D-locks.'' To lock the bicycle, one locks it physically to some other object, such as a bike rack, parking meter or other pole installed securely in the solid ground. Merely locking the bike frame to the wheel is not recommended because, although it cannot be rolled away, the entire bi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sheldon Brown (bicycle Mechanic)
Sheldon Brown (July 14, 1944 – February 4, 2008) was an American bicycle bicycle mechanic, mechanic, technical expert and author. He contributed to print and online sources related to bicycling and bicycle mechanics, in particular the web site ''Sheldon Brown's Bicycle Technical Info''. His knowledge of bicycles was described as "encyclopaedic" by ''The Times'' of London. Background Brown was the parts manager, webmaster and technical consultant of Harris Cyclery, a local bike shop, bike shop in West Newton, Massachusetts, as well as an enthusiast of vintage and classic bicycles in addition to cycling in general. Brown maintained ''Sheldon Brown's Bicycle Technical Info'', a web site highlighting a broad range of cycling subjects ranging from how to fix a bicycle flat tire to details on Raleigh Bicycle Company, Raleigh and English three-speed bicycles, Sturmey-Archer hubs, tandem bicycle, tandems, and fixed-gear bicycles. He repaired cameras and was an Amateur Photographer, ama ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Track Bicycle
A track bicycle or track bike is a bicycle optimized for racing at a velodrome or outdoor track. Unlike road bicycles, the track bike is a fixed-gear bicycle; thus, it has only a single gear ratio and has neither a freewheel nor brakes. Bicycle tire, Tires are narrow and inflated to high pressure to reduce rolling resistance. History The first bicycle race is popularly held to have been a 1,200 meter race on the 31 May 1868 at the Parc de Saint-Cloud, Paris. It was won by expatriate Englishman James Moore (cyclist), James Moore who rode a wooden bicycle with iron bicycle tire, tires. The machine is now on display at the museum in Ely, Cambridgeshire, Ely, Cambridgeshire, England. The Union Cycliste Internationale was founded on 14 April 1900 by Belgium, the United States, France, Italy, and Switzerland to replace the International Cycling Association, which had been formed in 1892, over a row with Great Britain as well as because of other issues. Frame design A track bicyc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
