Schwalbe Av4 Schrader 40 Mm Inner Tube. Schwalbe AV4 Schrader inner tubes offer exceptional airtightness and reliability. Crafted from pure rubber mixtures, they feature consistent wall thickness and excellent air pressure retention. Each tube undergoes rigorous 24-hour inflation testing and visual inspection, ensuring outstanding durability. The high elasticity of the standard execution allows one tube (No. 17) to fit a wide range of tire sizes (28-47mm), simplifying inventory for dealers and guaranteeing quality. Nickel-plated, threaded Schrader 40mm valves with replaceable inserts and a protective dust cap add to the premium feel and performance of this reliable 85g inner tube. This Brompton inner tube offers excellent quality and durability at a mid-range price. It´s a reliable choice, holding pressure well with higher quality rubber compared to standard Brompton tubes. This bicycle inner tube is specifically recommended for 16" Brompton wheels, fitting perfectly and performing well. The Schwalbe inner tube is known for its general reliability and offers good value for money. While a bit generous for 16" tires, it´s still the recommended size, providing a versatile and effective solution for Brompton bikes. A tube is not just a tube.- Airtightness: Apart from the quality of the ingredients, the purity of the rubber mixture is crucial to the quality of the tube. The base material is therefore sieved at enormous pressure through seven filters before being extruded. All tubes are inserted into a mould and inflated for vulcanization to ensure constant wall thickness and high air pressure retention.- Reliability: All tubes are inflated and stored for 24 hours in order to test for air pressure retention. Afterwards each, individual tube undergoes a careful visual inspection. This special quality control helps prevent unpleasant surprises and is why, over many years, Schwalbe tubes have become highly respected for outstanding reliability by bicycle dealers.- Group tube system: Only high elasticity and good quality allows a tube to cover very many tire sizes. Tube No. 17 can fit tire widths between 28 mm and 47 mm and that is a big advantage to the trade and simultaneously it vouches for the tubes quality. Only an extremely high-quality and reliable tube is up to to this requirement.- Valve: All valves are nickel plated and threaded and valve inserts are replaceable. Also Schwalbe tubes with the classic bicycle valve are capable of pressure testing thanks to a high pressure valve seal. And it is plain to see as each tube is crowned with a transparent polycarbonate dust cap. Specifications: - Valve type / lenght: Schraeder 40mm - Execution: Standard - Weight: 85 g. tradeinn Bikeinn