The bicycle wheel is an important part of the bicycle, it supports the weight of the bicycle and provides driving power and balance. The choice and configuration of bicycle wheels depends on different types of bicycles and riding needs. For example, road bikes typically require lightweight, high-speed and smooth wheels, while mountain bikes require stronger and more durable wheels for rough terrain. Therefore, according to the purpose of riding and personal preference, it is important to choose the right wheel, which will directly affect the handling performance and riding experience of the bicycle. A bicycle wheel usually consists of the following main components:

     Rim: The rim is the outer circular part of the wheel used to mount and support the tire. It is usually made of lightweight metal alloys (such as aluminum alloy) or materials such as carbon fiber, which has sufficient rigidity and strength.

     Spokes: Spokes are long, thin metal rods that connect the axle to the rim. They are evenly distributed on the rim in a radial shape, and support and transmit force through tension, so that the wheel remains stable and bears the load. Spokes are usually made of stainless steel or other high-strength metals.


     Axle: The axle is the central shaft that connects the two wheel bearings. It uses bearings to allow the wheels to spin smoothly. Axles are usually made of steel for sufficient strength and rigidity.

     Bearings: The bearing system between the axle and rim reduces friction and allows the wheel to spin smoothly. Rolling bearings (such as deep groove ball bearings) or sliding bearings (such as ductile iron sleeves) are usually used to support and reduce friction.

     Tire: A tire is a tire made of rubber that covers the rim. It provides contact with the ground, provides traction and shock absorption. The type and specification of vehicle tires vary by application and include road tires, mountain bike tires, city bike tires, etc.

In addition to the above basic components, bicycle wheels can also include other accessories and special parts, such as brake systems (brake discs or shoes), freewheels (to allow the rider to easily stop pedaling and continue to coast) and spoke covers (to protect the spokes), etc.