Tubolito S-Tubo Road Inner Tube 700 x 18-32 60mm Presta Valve S-Tubo products are characterized by the reduced wall thickness of the tubes. Therefore they are even smaller, lighter and have a very low rolling resistance. S-Tubo-Road for instance is the lightest bicycle inner tube worldwide and does have a rolling resistance comparable to latex tubes. Key specifications 78% lighter than a standard tube and 75% smaller to take up the least amount of space in your jersey pocket Same rolling resistance as a latex tube Suitable for disc brakes only Weight: 23g