The specialized 650b schrader inner tube have been designed to be the perfect replacement if you acquire a flat the tubes feature a long schrader valve and they have been moulded for a consistent thickness of butyl rubber these schrader inner tubes are ideal for tyres widths from 175 24 specialized 650b schrader inner tube features designed for 175 24 tyre widths long 40mm schrader valve for fast inflation moulded construction for a consistent thickness made from a h