The Schwalbe tube No.15 fits 28" (or 27" - 630) tires with a width of 18-28 mm and is used for racing bikes. Due to their excellent manufacturing, Schwalbe tubes have proven themselves over the years in the market. They are uniform in wall thickness and run round. Their precise adhesion makes them durable at the seam. A comparison test showed that the Schwalbe tube retains air pressure significantly longer than other tubes (these lost almost twice as much air pressure in 30 days as the Schwalbe tube). A possible reason for this could be a lower butyl content in the other tubes. The special quality of Schwalbe tubes arises from the uniqueness of their rubber compound. To ensure this high quality, each individual Schwalbe tube is inflated and inspected for at least 24 hours before it leaves the factory. Features: - Butyl rubber ensures twice the air retention. - 24-hour test for each tube. - High elasticity allows for covering many tire sizes per tube. - Recycling process achieves very good energy balance. Suitable for tire sizes, including: - 18-622 | 28 x 3/4 | 700 x 18C - 18-622 | 28 x 0.75 | 700 x 18C - 19-622 | 700 x 19C - 19-622 | 700 x 19 - 20-622 | 28 x 0.75 | 700 x 20C - 20-622 | 28 x 3/4 | 700 x 20C - 22-622 | 28 x 0.90 | 700 x 22C - 22-622 | 700 x 22 - 22-622 | 28 x 7/8 | 700 x 22C - 23-622 | 28 x 0.90 | 700 x 23C - 24-622 | 700 x 24C - 24-622 | 700 x 24 - 25-622 | 28 x 1 1/16 - 26-622 | 700 x 26C - 26-622 | 700 x 26 - 28-622 | 28 x 1 5/8 x 1 1/8 | 700 x 28C - 20-630 | 27 x ¾ - 22-630 | 27 x 7/8 - 25-630 | 27 x 1 1/16 - 25-630 | 27 x 1.00 Delivery includes: - Schwalbe tube 28'' No.15 (SV15) workshop packaging of 25 pieces.