The Schwalbe DV13 tube is designed for 26-inch bicycles and features a comprehensive size compatibility range from 40-559 to 62-559 tire dimensions, corresponding to 26 x 1.50 to 26 x 2.50 tire sizes. This workshop packaging contains 50 units, making it ideal for bike repair shops, maintenance facilities, or frequent users who need reliable replacement tubes. Each tube is equipped with a 40-millimeter Blitz-Dunlop valve, which is widely used in European bicycle applications. Weighing 190 grams per tube, these tubes offer a robust construction for daily cycling use under various riding conditions. The compatibility range includes specific tire sizes: 40-559 (26 x 1.50), 42-559 (26 x 1.60), 47-559 (26 x 1.75, 26 x 1.85, 26 x 1.90), 50-559 (26 x 1.90/2.00, 26 x 2.00), 54-559 (26 x 2.10), 55-559 (26 x 2.15), 57-559 (26 x 2.25), 60-559 (26 x 2.35), and 62-559 (26 x 2.50). This extensive size coverage makes the DV13 suitable for various types of bicycles, including city bikes, touring bikes, and recreational bikes with standard 26-inch wheels. The product is manufactured by Schwalbe, a recognized brand in the bicycle components sector, ensuring consistent quality and reliable performance. The tubes are designed for unisex use, making them suitable for all riders regardless of gender. The workshop packaging format allows for cost-effective bulk purchasing for professional or frequent usage scenarios where multiple tube replacements are regularly needed.