List of 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 axleBar ends: extensions at the end of straight handlebars to allow for multiple hand positionsBar plugs or end caps: plugs for the ends of handlebarsBasket: it is an optional attachment on a bike and is used for carrying things Bearing: a device that facilitates rotation by reducing frictionBell: an audible device for warning pedestrians and other cyclistsBelt-drive: alternative to chain-driveBicycle brake cable: see CableBottle cage: a holder for a water bottleBottom bracket: The bearing system that the pedals rotate around. Contains a spindle to which the crankset is attached and the bearings themselves. There is a bearing surface on the spindle, and on each of the cups that thread into the frame. The bottom bracket may be overhaulable or not overhaulable. The bottom bracket fits inside the bottom bracket shell, which is part of the bicycle frameBrake: devices used to stop or slow down a bicycle. Rim brakes and disc brakes are operated by brake levers, which are mounted on the handlebars. Band brake is an alternative to rim brakes but can only be installed at the rear wheel. Coaster brakes are operated by pedaling backwardBrake lever: a lever for actuating a bicycle brakeBrake shifter or colloquially, brifter : combined shifter and brake lever controlBraze-on: a fitting protruding from a frame to provide attachment, typically for cable housings or tire pumps and similar accessoriesCable guide: a fitting below the bottom bracket which guides a piece of bare inner bowden cable around a cornerCable: a metal cable enclosed in part by a metal and plastic housing that is used to connect a control, such as a brake or shifting lever, to the device it activatesCartridge bearing: a type of bearing that is not user-serviceable, but must be replaced as a unitCassette: a group of stacked sprockets on the rear wheel of a bicycle with a rear derailleurCoaster brake or backpedal brake Chain: a system of interlinking pins, plates and rollers that transmits power from the front sprocket to the rear sprocketChainguard: Gear case cover for the entire chain either totally encasing or 'incomplete'. Either way, designed to keep clothing from fouling the chain. See also Skirtguard, Bashguard.Chainring: front gear, attached to a crankChainset: see CranksetChainstay: a pair of tubes on a bicycle frame that runs from the bottom bracket to the rear fork endsChain tensioner: a device to maintain proper chain tensionChaintug: a device to aid in setting the proper chain tensionCluster: a bicycle cogset, either a freewheel, or cassetteCogset: the set of rear sprockets that attaches to the hub on the rear wheelCone: holds bearings in place, pressed against the cupCotter: pin for attaching cottered cranksCoupler: to connect tubing togetherCrankset or chainset: composed of cranks and at least one chainringCup: receives ball bearings which roll along its inner surface; integrated on most conventional hubs or can be pressed into older bottom bracket shells. See also ConeCyclocomputer: an electronic accessory that measures and displays instantaneous and cumulative speed and distance. Often provides other measurements such as heart rateDerailleur: an assembly of levers, usually cable-actuated, that moves the chain between sprockets on a cassette or chainring assemblyDerailleur cage: the part of the Rear derailleur that holds the Pulley wheelsQuick release dropout: a piece on the rear dropout that the derailleur attaches to.Down tube: tube on the bicycle frame that runs from the head tube to the bottom bracketDropout: a bicycle rear fork end that allows the rear wheel to be removed without first derailing the chain. The term dropout is often incorrectly used to refer to any fork end, but not all fork ends are dropoutsDustcap: any cap serving to keep dirt and contamination out of an assembly. Common over crank bolts, often plasticDynamo: bicycle lighting component, also known as generatorEyelet:Electronic Gear-Shifting System: not simply a type of shifter or a type of derailleur, a complete system with switches instead of levers, wires instead of Bowden cables, and motor-driven derailleurs that must all work togetherFairing: a full or partial covering for a bicycle to reduce aerodynamic drag or to protect the rider from the elementsFender or mudguard: curved pieces of metal or plastic above the tires which catch and redirect road spray thrown up by the tires, allowing the rider to remain relatively clean. May come in pairsFerrule: a metal or plastic sleeve used to terminate the end of a cable housingFork: a mechanical assembly that integrates a bicycle's frame to its front wheel and handlebars, allowing steering by virtue of its steerer tubeFork crown: the point at which the two blades of the fork meet below the steerer tube.Fork end: paired slots on a fork or frame at which the axle of the wheel is attached. See also DropoutFrame: the mechanical core of a bicycle, the frame provides points of attachment for the various components that make up the machine. The term is variously construed, and can refer to the base section, always including the bottom bracket, or to base frame, fork, and suspension components such as a shock absorberFreehub: a ratcheting assembly onto which a cog or cassette is mounted that allows the bicycle to coast without the pedals turningFreewheel: a ratcheting assembly that incorporates one or more cogs and allows the bicycle to coast without the pedals turningGusset: plates added to the outsides of frame tubes to strengthen joints. These are more commonly seen on BMX and mountain bikesHanger: part of frame or an attachment to the frame to which the derailleur is attached Handlebar: a lever attached, usually using an intermediary stem, to the steerer tube of the fork. Allows steering and provides a point of attachment for controls and accessoriesHandlebar plug: see Bar plugsHandlebar tape: a tape wound around dropped handlebars so as to provide padding and grip, usually cork or cloth, sometimes foam rubberHead badge: manufacturer's or brand logo affixed to the head tubeHead tube: the tube of a bicycle frame that contains the headsetHeadset: the bearings that form the interface between the frame and fork steerer tubeHood: the rubber brake lever covering on bikes with drop style handle barsHub: the core of a wheel; contains bearings and, in a traditional wheel, has drilled flanges for attachment of spokesHub dynamo: a generator inside one of the hubs for powering lights or other accessoriesHub gear: a gearbox mounted inside the hub, 3-speed is common, 5, 7 are available, Enviolo makes a CVT, and Rohloff makes a 14-speed hub. Cable operated by one or two cablesIndicator: a turn signalInner tube: a bladder that contains air to inflate a tire. Has a Schrader, "Woods"/"Dunlop" or Presta valve for inflation and deflationJockey wheel or Pulley wheel: one of two small sprockets of the rear derailleur that guides the chainKickstand: a folding attachment used for assisting a bicycle to stand up on its own. Usually mounts to frame near bottom bracket, sometimes near rear dropouts"Lawyer lips": also called a "lawyer tab", a retention device on the dropouts of the front fork to prevent inadvertent loss of the front wheel in the case it is not properly securedLocknut: a nut designed not to loosen due to vibrationLockring: a ring, usually metal, of varying design, that serves to retain a component in placeLug: a metal connector used to align frame components where they join each otherLuggage carrier: any accessory equipment designed to carry tools, gear or cargoMaster link: a bicycle chain accessory that allows convenient removal and reconnection of an installed bicycle chain without the need for a chain toolNipple: a specialized nut that most commonly attaches a spoke to a wheel rim. In some systems, it provides attachment to the hubPannier: cloth zippered storage bags that mount to sides of luggage racks. Pronounced pan-ear, or pan-yer Pedal: mechanical interface between foot and crank arm. There are two general types; one secures the foot with a mechanical clamp or cage and the other has no connection to lock the foot to the pedal.Peg: short metal tube, about long and fastened to one or both ends of the wheel axles to either enable the rider perform certain tricks or provide a place for extra riders to stand or restPortage strap: a strap attached to the inside of the bike frame, designed to make carrying the bike over one's shoulder easierPulley wheel: see Jockey wheelPower meter: a device on a bicycle that measures the power output of the riderQuick release skewer: a skewer with a lever on one end that loosens when the lever is flipped. Used for releasing wheels and seat postsRack: a rack that attaches behind the seat, usually with stays to the rear dropouts, that serves as a general carrierReflector: reflects light to make bicycle evident when the illuminated by headlights of other vehicles. Usually required by law but held in disdain by many cyclistsRemovable training wheels: used for assisting balance. Comes in pair. Useful for first time bicyclistsRim: that part of a wheel to which the tire is attached and often forms part of the braking mechanismRotor:Safety levers: extension levers, and interrupt brake levers. Used to apply brakes in order for the bicycle to slow down or suddenly stopSaddle or Seat: what a bicyclist sits onSeat rails: a metal framework over which saddle covering is stretched. The seat post attaches to the seat rails by means of a clampSeat lug: a frame lug on the top of the seat tube serving as a point of attachment for a clamp to secure the seat postSeat tube: the roughly vertical tube in a bicycle frame running from the seat to the bottom bracketSeat bag: a small storage accessory hung from the back of a seatSeatpost: a post that the seat is mounted to. It slides into the frame's seat tube and is used to adjust ride height depending how far into the seat tube it is insertedSeatstay: frame components, small diameter tubes running from top of seat tube to rear dropoutsShaft-drive: alternate to chain-driveShifter: gear shifting controlShock absorber: for bicycles with suspensions, a device that limits the rate at which suspension rebounds after absorbing an impactSide view mirror: aids in looking at the sides prior to moving slowly or turning to the left or to the rightSkirt guard or coatguard: a device fitted over the rear wheel of a bicycle to prevent a long skirt, coat or other trailing clothes or luggage from catching in the wheel, or in the gap between the rim and the brakesSpindle: an axle around which a pedal rotates; threaded at one end to screw into crank armsSpoke: connects wheel rim to hub. Usually wire with one end swaged to form a head and one threaded end. A typical wheel has 36 spokesSpeakers: loudspeakers specifically made for bicycles and/or strollers for cyclists and pedestrians with children to listen music or answer phone calls on their mobile devices when bicycling or transporting children. Both wireless and wired speakers are available to mount on their handlebars or frames. Even though speakers specifically made for bicycles are available to purchase, but depending on the sizes and shapes and the cyclists' ingenuities, any speakers can be strapped on to them typically by using silicone strappings. These speakers meant to eliminate the risks of using headphones such as obliviousness of incoming cars and other warnings, and continuous playing of music from them would also alert other cyclists and pedestrians nearby Sprocket or cog: wheel with teeth that meshes with the chain; one of the wheels in the cogset or cranksetSteerer tube: a tube on top of a fork that is inserted through frame and serves as an axle by means of which bicycle can be steeredStem: a bracket used to attach handlebars to steerer tube of fork. Usually secured by pinch boltsTire: as in common usage. Usually pneumatic. A tubular tire is glued to the wheel rim; most tires use tubes, but tubeless tires and rims are increasingly commonToe clips: a metal or plastic cage attached to a pedal. Usually has an adjustment strap. Secures foot to pedal for increased control and more effective transfer of power from foot to drive chainTop tube: frame member leading from head tube to seat tubeValve stem or simply valve: port for adding or releasing air from the inner tube. Two types are commonly used: Presta and Schrader. A third type, the Woods/Dunlop valve, can still be found in Europe and Asia.Wheel: as in common usage. Traditionally and most commonly spokedWingnut: for attaching wheels before the development of the quick release skewer