The Schwalbe Presta Inner Tube 16 x 1.3/8. Schwalbe tubes have extremely high air retention and elasticity. This high elasticity allows a wide range of different tire sizes to be covered. The Schwalbe tube has been valued by German bicycle dealers for its high reliability for many years, each Schwalbe tube is checked twice on air retention in the factory. The valve is nickel-plated and threaded and is replaceable.