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A BMX bike is a
bicycle A bicycle, also called a pedal cycle, bike, push-bike or cycle, is a human-powered transport, human-powered or motorized bicycle, motor-assisted, bicycle pedal, pedal-driven, single-track vehicle, with two bicycle wheel, wheels attached to a ...
used for
cycle sport Cycle sport is Competition, competitive physical activity using bicycles. There are several categories of bicycle racing including road bicycle racing, cyclo-cross, mountain bike racing, track cycling, BMX, and cycle speedway. Non-racing cycli ...
, specifically
racing In sports, racing is a competition of speed, in which competitors try to complete a given task in the shortest amount of time. Typically this involves traversing some distance, but it can be any other task involving speed to reach a specific g ...
or stunt riding. BMX stands for ''bicycle
motocross Motocross is a form of off-road motorcycle racing held on enclosed off-road circuits. The sport evolved from motorcycle trials competitions held in the United Kingdom. History Motocross first evolved in Britain from motorcycle trials competi ...
''.


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 Steel is an alloy of iron and carbon that demonstrates improved mechanical properties compared to the pure form of iron. Due to steel's high Young's modulus, elastic modulus, Yield (engineering), yield strength, Fracture, fracture strength a ...
,
aluminum Aluminium (or aluminum in North American English) is a chemical element; it has chemical symbol, symbol Al and atomic number 13. It has a density lower than that of other common metals, about one-third that of steel. Aluminium has ...
, 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 thicker and wider tread for better grip on potentially loose surfaces. * Flatland – flatland style BMX bikes have different frame geometry to traditional park BMX bikes because flatland riding requires precise balance on multiple parts of the bike. * Park – park style BMX bikes (also called vert) are often made lighter by reducing the structural strength of particular areas of the bike, which is possible because park riding does not occur on particularly rough terrain. Brakes may or may not be installed. * Race – racing style BMX bikes feature lighter materials and slightly different frame geometry and sizes. Racing BMX bikes are required to have brakes. Their light weight construction and wide array of customizable gear ratios allow race bikes to accelerate quickly. Conversely, the lightweight construction means race bikes are not for freestyle (tricks) use. * Street – modern street style BMX bikes commonly have nylon composite sleeved pegs attached to the axles to enable the rider to grind or balance on various raised obstacles. Metal pegs have fallen out of favor among street riders due to the unkempt nature of street obstacles. Also, the street BMX is heavier and stronger due to the extra strain encountered with the hard, flat surfaces of street riding. Street riders commonly have no cable brakes to enable the rider to spin the bars without the brake cable getting in the way. Riders use their foot against the top of the back tire to slow down, or fit a u-brake to the rear with an extended cable or a gyro to allow for full rotation of the bars.


Notable BMX bike manufacturers

Current and former makers of BMX bikes include: * Advanced Sports International * Cult * Diamondback Bicycles * Dynacraft BSC * Ellsworth Handcrafted Bicycles * Fitbikeco * Fuji Bikes * GT Bicycles * Hutch BMX * Haro Bikes * Huffy * JMC Bicycles * Kink * Kuwahara * Mongoose *
Next NeXT, Inc. (later NeXT Computer, Inc. and NeXT Software, Inc.) was an American technology company headquartered in Redwood City, California that specialized in computer workstations for higher education and business markets, and later develope ...
* Nishiki * Pacific Cycle * Redline bicycles * Ross * SE Racing *
Schwinn Bicycle Company The Schwinn Bicycle Company is an American company that develops, manufactures and markets bicycles under the eponymous brand name. The company was founded by Ignaz Schwinn (1860–1948) in Chicago in 1895, and in the 20th century became the domi ...
* Subrosa * Sunday * Torker * Wethepeople


See also

* Dirt jumping * Pump track *
Cycling Cycling, also known as bicycling or biking, is the activity of riding a bicycle or other types of pedal-driven human-powered vehicles such as balance bikes, unicycles, tricycles, and quadricycles. Cycling is practised around the world fo ...
* Glossary of cycling * Outline of cycling *
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 ...


References

{{Human-powered vehicles BMX Cycle types