Schwalbe AV5 18" standard inner tube with Schrader (car type) valve. Fits Sizes: 32-357: 17 x 1 1/4 32-369: 17 x 1 1/4 37-387: 18 x 1 1/2 37-390: 18 x 1 3/8 450 x 35A 37-400: 18 x 1 3/8 40-355; 18 x 1.50 42-355: 18 x 1.60 44-355: 18 x 1.65 47-355: 18 x 1.75 47-355: 18 x 1.90 Image is for illustration only. Specific sizes shown on the image may not be relevant to the tube in the description Why Choose Schwalbe Tubes? Schwalbe use the highest quality ingredients in the manufacture of their inner tubes, the purity of the rubber compound is critical for the quality of the tube. Before extrusion, the basic material is forced through a total of seven filters under enormous pressure. All tubes are inserted and inflated into a mould for the vulcanization process. This ensures an even wall thickness and high air retention . All tubes are inflated and stored for 24 hours to test for air retention. Afterwards, every tube is carefully checked by visual inspection before packing. As a result of this the Schwalbe inner tube has been the top choice of German bicycle dealers for its quality and reliability for many years. A tube covers many tyre sizes through its high elasticity and quality. Tube no. 17 for instance works with tyres from a width of 28 mm up to 47 mm - a great advantage for multiple tyre combination and at the same time, is proof of the quality of the Schwalbe inner tube. All valves are nickel-plated and threaded and the valve core is always replaceable.