|
Fixed-gear Bicycle
A fixed-gear bicycle or fixie is a bicycle that has a drivetrain with no freewheel mechanism, meaning the pedals always spin together with the rear wheel. The freewheel was developed early in the history of bicycle design but the fixed-gear bicycle remained the standard track racing design. More recently the "fixie" has become a popular alternative among mainly urban cyclists, offering the advantage of simplicity compared with the standard multi-geared bicycle. Most bicycle hubs incorporate a freewheel to allow the pedals to remain stationary while the bicycle is in motion, so that the rider can coast, i.e., ride without pedalling using forward momentum. A fixed-gear drivetrain has the drive sprocket (or cog) threaded or bolted directly to the hub of the back wheel, so that the pedals are directly coupled to the wheel. During acceleration, the pedal crank drives the wheel, but in other situations, the rear wheel can drive the pedal cranks. This direct coupling allows a cycli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moyer Cycles I
Moyer is a surname. Notable people with the surname include: * Alex Moyer (born 1963), American football linebacker * Alice Curtice Moyer (1866–1937), American writer and suffragist * Allen Moyer (born 1958), American set designer * Andrew J. Moyer (1899–1959), American microbiologist * Brett Moyer (born 1984), American lacrosse player * Brian C. Moyer, Director of the U.S. Bureau of Economic Analysis (from 2014) * Buck Moyer (''Virgil A. Moyer Jr.'', 1920–2015), American Lutheran pastor * Carrie Moyer (born 1960), American painter and writer * Charles Moyer (1866–1929), president of the Western Federation of Miners * David Moyer, American Anglican bishop * Denny Moyer (1939–2010), American boxer * Donald R. Moyer (1930–1951), United States Army soldier, posthumous Medal of Honor recipient * Diane Moyer (born 1958), American field hockey player * Ed Moyer (1885–1962), American baseball player * Ellen Moyer (born 1936), American politician, mayor of Annap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Derailleur Gears
Shimano 600 front derailleur (1980) A derailleur () is a variable-ratio bicycle gearing system consisting of a chain, multiple sprockets of different sizes, and a mechanism to move the chain from one sprocket to another. Modern front and rear derailleurs typically consist of a moveable chain-guide that is operated remotely by a Bowden cable attached to a shifter mounted on the down tube, handlebar stem, or handlebar. When a rider operates the lever while pedalling, the change in cable tension moves the chain-guide from side to side, "derailing" the chain onto different sprockets. Etymology ''Dérailleur'' () is a French word, derived from the derailment of a train from its tracks. Its first recorded use was 1930. History A modern road bicycle drivetrain with front and rear derailleurs Various derailleur systems were designed and built in the late 19th century. One example is the Protean two-speed derailleur available on the Whippet safety bicycle. The Fren ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bicycle Pedal
The pedal is the part of a bicycle that the rider pushes with their foot to propel the vehicle. It provides the connection between the cyclist's foot or Cycling shoe, shoe and the Crankset, crank allowing the leg to turn the bottom bracket spindle and propel the bicycle's wheels. A pedal usually consists of a axle, spindle that threads into the end of the crank, and a body on which the foot rest is attached, that is free to rotate on Bearing (mechanical), bearings with respect to the spindle. Pedals were initially attached to cranks connecting directly to the driven (usually front) wheel. The safety bicycle, as it is known today, came into being when the pedals were attached to a crank driving a sprocket that transmitted power to the driven wheel by means of a roller chain. Types Just as bicycles come in many varieties, there are different types of pedals to support different types of cycling. Flat and platform Traditionally, platform pedals were pedals with a relatively large ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BMX Bike
A BMX bike is a bicycle used for cycle sport, specifically racing or stunt riding. BMX stands for ''bicycle motocross''. Construction Though originally denoting a bicycle intended for BMX racing, the term "BMX bike" is now used as a generic term to encompass race bikes ('class' and 'cruiser') and those used for freestyle disciplines (street, vert, park, flatland), and dedicated dirt jumper bicycles. Frames are made of various types of steel, aluminum, or carbon fiber. Cheaper, low-end bikes are usually made of steel. Higher range freestyle bikes are mostly chromoly, such as lightweight 4130 chromoly, or generation 3 chromoly. BMX race bikes extensively use aluminum or carbon fiber. BMX bikes are smaller in size as compared to other bikes. These bikes come with thick and fat tires to absorb shocks and for better jumping. Generally, rear brakes are available only in racing BMX. Models BMX bicycles are available in these types: * Dirt – These bikes feature tires with t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Detangler
The detangler, Gyro or rotor is an invention for the freestyle BMX bicycle, allowing the handlebars to turn a complete 360° rotation without the brake cables getting tangled up. A detangler is usually only used for the rear brake cable. The front brake cable can be routed through the stem, via a hollow stem bolt known as a Pott's mod bolt, and fork steer tube to avoid the tangling problem. How it works The single cable from the handlebar's rear brake lever divides into two cables which are routed to opposite sides of the stem or fork steer tube and into cable stops. The inner cables connect to metal tabs on a disc attached to the upper side of a thrust bearing placed around the stem or steer tube. Squeezing the brake lever pulls the inner cables and causes the bearing assembly to rise. A second disc is attached to the bottom of the thrust bearing such that the entire assembly moves together up and down the steering axis while each disc can rotate independently around the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montreal Mirror
''Montreal Mirror'' or just ''Mirror'' was a free English language alternative newsweekly based in Montreal, Quebec, Canada which was distributed every Thursday. It had a circulation of 70,000 and reached a quarter of a million readers per week. First published on June 20, 1985, the publication became a weekly in September 1989. It was bought by media giant Quebecor in 1997. It was published by ''Communications Gratte-Ciel Ltée''. On June 22, 2012, Sun Media (the division of Quebecor that the Mirror belonged to) announced that the paper would be ceasing publication effective immediately.{{cite web , url=http://www.marketwire.com/press-release/montreal-mirror-to-end-publication-tsx-qbr.a-1672679.htm , title=Montreal Mirror to End Publication , date=June 22, 2012 , website=Marketwire , url-status=dead , archiveurl=https://web.archive.org/web/20120625064319/http://www.marketwire.com/press-release/montreal-mirror-to-end-publication-tsx-qbr.a-1672679.htm , archivedate=25 June 2012 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Courier 547
A courier is a person or organization that delivers a message, package or letter from one place or person to another place or person. Typically, a courier provides their courier service on a commercial contract basis; however, some couriers are government or state agency employees (for example: a diplomatic courier). Duties and functions Couriers are distinguished from ordinary mail services by features such as speed, security, tracking, signature, specialization and individualization of express services, and swift delivery times, which are optional for most everyday mail services. As a premium service, couriers are usually more expensive than standard mail services, and their use is normally limited to packages where one or more of these features are considered important enough to warrant the cost. Courier services operate on all scales, from within specific towns or cities, to regional, national and global services. Large courier companies include DHL, DTDC, FedEx, EMS Inter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kinetic Friction
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. Types of friction include dry, fluid, lubricated, skin, and internal -- an incomplete list. The study of the processes involved is called tribology, and has a history of more than 2000 years. Friction can have dramatic consequences, as illustrated by the use of friction created by rubbing pieces of wood together to start a fire. Another important consequence of many types of friction can be wear, which may lead to performance degradation or damage to components. It is known that frictional energy losses account for about 20% of the total energy expenditure of the world. As briefly discussed later, there are many different contributors to the retarding force in friction, ranging from asperity deformation to the generation of charges and changes in local structure. When two bodies in contact move relative to each other, due to these various ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Track Stand
The track stand or standstill is a technique that bicycle Cycling, riders can use to maintain balance while their bicycle remains stationary or moves only minimal distances. The technique originated in track cycling and is now used by other types of cyclists wishing to stop for a short time without putting a foot on the ground, such as bike commuters at stop signs. To perform a track stand, a cyclist holds the cranks in an approximately horizontal position with the front wheel steered to the left or right, and pedals forward, and back in the case of a fixed-gear bicycle, which the steered front wheel converts into a side-to-side motion. Origin and use The term originated from use of the technique by track cycling, track cyclists prior to starting, or as a tactic in Sprint (cycling), track sprinting whereby riders will initially ride very slowly and maneuver across the track in an effort to get their rival to take the lead so that they can then Drafting (aerodynamics), draft (or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artistic Cycling
Artistic cycling is a form of competitive indoor cycling in which athletes perform tricks (called exercises) for points on specialized, Fixed-gear bicycle, fixed-gear bikes in a format similar to ballet or gymnastics. The exercises are performed in front of judges in five-minute roundsAbout Indoor Cycling Artistic Cycling, UCI, Retrieved 18 April 2021 by singles, pairs, four- or six-person teams. History The first unofficial world championships in artistic cycling was held in 1888 by Swiss-American Nicholas Edward Kaufmann and was largely a publicity stunt to showcase his trick bicycling. The first official world championships were held for men in 1956 and for women in 1970.Bikes The bicycles used for artistic cycling are a form of fixed gear bicycle. The gearin ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bike Polo
Cycle polo, bicycle polo, or bike polo (''polo-vélo'' in French; ''Radpolo'' in German) is a team sport, similar to traditional polo, except that bicycles are used instead of horses. There are two versions of the sport: Hardcourt Bike Polo and grass court bike polo. The hardcourt game saw a sharp spike in interest in the first decade of the 21st century and new teams are sprouting up all across the world. History Cycle polo was featured in the Summer Olympic Games unofficial programme in 1908 Summer Olympics, 1908. Fédération sportive du travail (FST) 1919-1934 in France. The World Bicycle Polo Federation was founded in 1987 in the USA. The Cycle Messenger World Championships have been ongoing since 1993, as well as the European Cycle Messenger Championships since 1996. The grass game There are two versions of the grass games: the four-player game and the five-player game. In the four-player game, cycle polo is played in a rectangular grass field, officially, unoff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cycle Ball
Cycle-ball, also known as "radball" (from German language, German), is a sport similar to association football played on bicycles. The two people on each team ride a fixed gear bicycle with no brakes or cogset, freewheel. The ball is controlled by the bike and the head, except when defending the goal. History The sport was introduced in 1883 by American artistic cyclist, Nicholas Edward Kaufmann. The first match was played on September 14 that year between Kaufmann and fellow artistic cyclist John Featherly. Its first world championships were in 1929. In the early 20th century, the sport spread to Germany; in the modern day, Germany is the location of the sport's largest fanbase. Cycle-ball is also popular in Austria, Switzerland, and the Czech Republic. The most successful players were the Pospíšil brothers of Czechoslovakia, world champions 20 times between 1965 and 1988. Closely related is artistic cycling in which the athletes perform a kind of gymnastics on cycles. Ru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
