binnenbanden

Binnenbanden, or inner tubes, are flexible rubber tubes placed inside pneumatic tires to contain the air and create a sealed chamber between the tire and the rim. They are used primarily on bicycles and remain common in many bikes today, although tubeless tire systems have become more prevalent in recent years.

Most binnenbanden are made of butyl rubber, which holds air well and resists permeation. Latex inner tubes are lighter and more supple but can age faster and require more careful handling. Tubes are designed to fit specific wheel diameters and tire widths, and are equipped with a valve for inflation. The two most common valve types are Schrader (car-type) and Presta (narrow, threaded), and the choice often depends on the rim hole size and rider preference.

Maintenance and use involve careful mounting to avoid pinching the tube between tire and rim, regular inflation to recommended pressures on the tire sidewall, and inspection for wear or punctures. Punctures can be repaired with patches if the tube sidewall is intact and the patch is properly applied; otherwise the tube is typically replaced. In modern cycling, tubeless setups reduce or eliminate the need for inner tubes, using sealant and tubeless rims, but inner tubes remain a widely used option, especially on older bikes or where tubeless compatibility is limited.

Overall, binnenbanden are a simple, replaceable component that still play a significant role in cycling, providing a reliable and repairable solution for maintaining tire pressure and ride quality.