I'm assuming you're referring to the tubes in the tires here.
The purposes for using air-filled tubes in bicycle wheels are comfort, traction and weight.
W/o air filled tires, the option is solid tires, and solid tires gives a harsher ride on uneven surfaces, poorer traction and a higher weight.
The purpose of the seat tube collar on a bicycle frame is to secure the seat post in place and prevent it from slipping or moving while riding.
A bicycle rim liner is a protective strip that sits between the inner tube and the rim of the wheel. Its purpose is to prevent the inner tube from getting punctured by the spoke nipples or sharp edges of the rim. By providing a barrier between the tube and the rim, the rim liner helps to reduce the risk of flats and damage to the inner tube. This contributes to the overall performance and longevity of the bicycle wheel by improving its durability and reducing maintenance needs.
The purpose of a tire inner tube in a bike is to hold the air that provides cushioning and support for the tire. It contributes to the overall performance of the bicycle by maintaining proper tire pressure, which affects the bike's handling, speed, and efficiency.
To measure a bicycle tube size accurately, first remove the tube from the tire. Then measure the diameter of the tube and the width of the tire. Use these measurements to determine the correct tube size for your bicycle.
Bicycle rim tape is a protective strip that covers the spoke holes on the rim. Its purpose is to prevent the inner tube from getting punctured or damaged by the sharp edges of the spoke holes. The rim tape acts as a barrier between the inner tube and the rim, reducing the risk of punctures and ensuring a smoother ride.
Bike rim tape is a protective strip that covers the spoke holes in a bicycle rim. Its purpose is to prevent the inner tube of the tire from getting punctured by the sharp edges of the spoke holes. By providing a smooth surface, the rim tape helps to maintain the integrity of the inner tube and prevent flats.
The recommended tube size for a bicycle tire that is 700x35c is a 700x35-43c tube.
A head tube spacer in a bicycle's steering system is used to adjust the height of the handlebars. It allows for fine-tuning the rider's comfort and riding position by raising or lowering the handlebars to the desired height.
A bicycle rim strip is a protective strip that covers the spoke holes on the rim. Its purpose is to prevent the inner tube from getting punctured or damaged by the sharp edges of the spoke holes. The rim strip acts as a barrier between the inner tube and the rim, reducing the risk of flats caused by the spoke holes.
The purpose of the bicycle seat stay is to connect the top of the seat tube to the rear wheel dropouts, providing stability and support to the frame. It helps distribute the rider's weight evenly and absorbs some of the shock and vibrations from the road, contributing to the overall strength and rigidity of the bicycle frame.
The recommended 700c tube size for your bicycle is typically 700x23-25c.
The standard bicycle tube size for most bikes is 700c.