Not only a spare: developed to fit in any small pocket, 35 grams lightweight S-Tubo-CX/Gravel-All, due to its very small packed size, is the ideal spare tube for all 700C and 650B tires from 32 mm – 50 mm width. However, it is not only a savior in need but can be perfectly used on a daily basis as it still is as robust as standard rubber tubes. Also leftovers of tubeless liquids do not do any harm to it. Given it’s low rolling resistance it can also become a decisive advantage in competitions. Available with 42 mm (35 grams) and 60 mm (36 grams) Presta valves (orange and black variants) and suitable for disc brakes.