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The bicyclesa is a fascinating machine with many parts – so many, in fact, that a lot people never actually learn the names and just point to an area on their bike when something goes wrong. But whether you’re new to bicycles or not, everyone knows pointing isn’t always the most effective way to communicate. You might find yourself walking out of a bike shop with something you didn’t actually want. Ever ask for a new “wheel” when all you really needed was a new tire?

Going into a bike shop to purchase a bike or get a tune up can be bewildering; it’s as if the employees speak a different language.

There is a lot of technical jargon in the world of bicycles and bicycle accessories. Simply knowing the basic part names can help clear the air and even make you feel more confident about riding your bike. That’s why we put together an article highlighting all, well almost all, the parts that make up a bicycle. If this sounds like more work than it’s worth just remember that when you’re interested in everything you will never have a dull day.

Use the photo and descriptions below as your guide. If you do forget the name of a part you’ve always got your finger to help point it out.

Essential Bicycle Parts / Bicycle Tool

Pedal

This is the part that a cyclist places their feet on. The pedal is attached to the crank which is the component that the cyclist rotates to spin the chain which in turn provides the bicycle’s power.

Front derailleur

Mechanism for changing the front gears by lifting the chain from one chain wheel to another; it allows the cyclist to adapt to road conditions.

Chain (or drive chain)

Set of metal links meshing with the sprockets on the chain wheel and gear wheel to transmit the pedaling motion to the rear wheel.

Chain stay

Tube connecting the pedal and crank mechanism to the rear-wheel hub.

Rear derailleur

Mechanism for changing the rear gears by lifting the chain from one gear wheel to another; it allows the cyclist to adapt to road conditions.

Rear brake

Mechanism activated by a brake cable, comprising a caliper and return springs; it forces a pair of brake pads against the sidewalls to stop the bike.

Seat tube

Part of the frame leaning slightly to the rear, receiving the seat post and joining the pedal mechanism.

Seat stay

Tube connecting the top of the seat tube with the rear-wheel hub.

Seat post

Component supporting and attaching the seat, inserted to variable depth into the seat tube to adjust the seat’s height.

Seat

Small triangular seat attached to the bicycle’s frame.

Crossbar

Horizontal part of the frame, connecting the head tube with the seat tube and stabilizing the frame.

Down tube

Part of the frame connecting the head tube to the pedal mechanism; it is the longest and thickest tube in the frame and gives it its rigidity.

Tire valve

Small clack valve sealing the inflation opening of the inner tube; it allows air to enter but prevents it from escaping.

Spoke

Thin metal spindle connecting the hub to the rim.

Tire

Structure made of cotton and steel fibers coated with rubber, mounted on the rim to form the casing for the inner tube.

Rim

Metal circle constituting the wheel’s circumference and on which the tire is mounted.

Hub

Central part of the wheel from which spokes radiate. Inside the hub are ball bearings enabling it to rotate around its axle.

Fork

Two tubes connected to the head tube and attached to each end of the front-wheel hub.

Front brake

Mechanism activated by a brake cable, comprising a caliper and return springs; it forces a pair of brake pads against the sidewalls to slow down the front wheel.

Brake lever

Lever attached to the handlebars for activating the brake caliper via a cable.

Head tube

Tube using ball bearings to transmit the steering movement to the fork.

Stem

Part whose height is adjustable; it is inserted into the head tube and supports the handlebars.

Bicycle Handle Bar Grip

Device made up of two handles connected by a tube, for steering the bicycle.

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