This inner tube is suitable for tire size 125/400 and fits the wheel of the Citroën 2CV. The tube supports the outer tire and retains air pressure for consistent driving behavior. The material withstands normal loads during daily use on paved roads. The valve position matches the original rim configuration of the vehicle. The inner tube provides stable contact between tire and rim. The product corresponds to the original design of the related vehicles and allows replacement or maintenance of the tires without modification of the rim or suspension. It serves as a functional component within the complete wheel assembly.