Ultralight Inner TubeMade of thermoplastic polyurethane elastomer material TPU it weighs 70 less than ordinary butyl rubber inner tubes and takes up 50 less space when placed in the pocket these bicycle inner tube weigh a mere 42g the inner tubes are brightly colored easy to identify making it easy to carry and very suitable as a portable spare inner tube.Strong and Puncture ResistantThe new TPU material has good puncture resistance wear resistance durability and antiaging. They ward off sudden flats and maintain stable performance even at lower tire pressures. In addition the TUP material is oil and water resistant and has excellent loadcarrying capacity and impact resistanceEnhanced Air TightnessThese road bike inner tube feature TPU valves ensuring superior air tightness and reliability. Choose from 45mm/65mm and 85mm Presta valve lengths to suit your bike rim. Engineered for both disc and rim brake systems these bicycle inner tubes cater to a diverse range of road vehicles. They excel in challenging racing and riding conditions.Fits multiple tire sizesThis C Road Bike series Inner Tube is compatible with many tire sizes 29/1.92.5 Includes Bike Tube Patch Repair Kits. Ridenow offers in weight for This Road Bike series Inner Tube 42g.Proper Inflation InstructionsTo prevent irreversible damage avoid overinflating the inner tube when not installed in the tire. When installing start with an initial inflation of 0.5 PSI ensuring that the inner tube adheres closely to the tires inner wall