The CONTINENTAL Race Tube Supersonic is a high-performance inner tube designed specifically for racing bikes. It is made with lightweight materials to reduce rotational weight and rolling resistance, ensuring maximum speed and efficiency on the road. This particular inner tube has a 42mm valve length, making it compatible with a wide range of bike wheels. Its black color gives it a sleek and professional appearance, blending seamlessly with any bike setup.Continental is known for producing reliable and durable cycling products, and this Race Tube Supersonic is no exception. It is constructed with high-quality materials to provide excellent puncture resistance, reducing the risk of flats during intense rides. This inner tube is designed to fit tires with widths ranging from 20mm to 25mm, making it suitable for a variety of road racing conditions. Its supersonic nature ensures optimal performance and responsiveness, allowing riders to push their limits and achieve their best results.Whether you are a competitive racer or a dedicated cyclist seeking an extra edge, the CONTINENTAL Race Tube Supersonic 42mm Black is a reliable and performance-driven choice for your racing bike.