The frame is the heart of the bicycle. It is the mechanical core that provides points of attachment for the various components that make up the machine. Most frames are diamond shaped consisting of two triangles: front triangle and rear triangle. The front triangle is made up of head tube, top tube, down tube and seat tube. It is the most important of all the bicycle parts. The rear triangle consists of the seat tube and paired chain stays and seat stays.
Drive-train and Gear
Drive-train and gears are the bicycle parts that make the machine moves. Obviously without these two, bicycles will never be called a mode of transportation. The drive-train is an indispensable component of a bicycle it is connected with the pedals which rotate the cranks, which are in turn held in axis by the bottom bracket. The drive chain then transmits the power to the rear wheel and then propels the bicycle forward.
Gears in various gear ratios are the bicycle parts that help cyclists maintain an optimum pedaling speed while covering varied terrain. Different gears and ranges of gears are appropriate for different people and styles of cycling. Multi-speed bicycles allow gear selection to suit the circumstances: a cyclist could use a high gear when cycling downhill, a medium gear when cycling on a flat road, and a low gear when cycling uphill.
Handlebars and Saddle
Handle bars and saddles are the bicycle parts that give the rider control and ease when riding the bicycle. Handle bars are mainly used for steering and control the direction of the bicycle. It is also in the handlebars where the accessory and brake controls are mouthed. The saddle which is the part where the rider sits on is place on the seat post near the rear end of the bicycle. The seat post is placed in between the two wheels to maintain balance and easy control.
Brakes are the most important bicycle part when it comes to safety. As per standard all bicycles are made with two brakes, one in the front wheel and the other in the rear wheel. There are different types of brakes each having its own purpose. Rim brakes and disc brakes are operated by brake levers, which are mounted on the handlebars are commonly used in off road bicycling. Coaster brakes are operated by pedaling backward are mainly used in on road biking.
Wheels and Tires
A bicycle is called a bicycle because of its two wheels. The two wheels of the bicycle are commonly referred to as the wheel set. Modern bicycle wheels are traditionally spoked. Tires vary enormously, they can either be thin, called skinny, for road biking, or may be thick such as used in off road biking.
These five are the basic bicycle parts, other devices that are attached to the bicycle are referred as the accessories such as head and tail lights and water bottle. Without the above mentioned the bicycle cannot function.