The Specialized Standard Schrader Valve Youth Tube has been designed for your little ones. They may have a youthful, intrepid spirit that sees them riding wherever the wind takes them, but most of the time it takes them straight through thorns and debris, leaving you with the unenviable task of changing out flat after flat. But with the Specialized Standard Schrader Valve Youth Tube, you'll have the peace of mind that they're riding on tough tubes that are built strong to last. And to make sure of it, they feature a moulded method of construction that ensures a consistent thickness of butyl rubber, meaning that they'll roll smooth and stay tough, ride after ride. Specialized Standard Schrader Valve Youth Tube Specifications Individually cured for consistent tube thickness - the utmost in quality. SV Tube: 20X1.5-2.3 32mm