Innertube 26" x 1.75" to 2.125" long 48mm Schrader Valve. Installation 1 Inflate with air to barely round inner tube 2 Mount one bead of tyre on rim of wheel 3 Insert tube into tyre inserting valve through hole in rim 4 Position rest of inner tube inside tyre 5 Mount the other bead into rim of wheel starting 6" from the valve using a tyre lever 6 Centre tyre and tube on rim of wheel and inflate to the pressure indicated on tyre wall A Perfect replacement for damaged or leaking inner tubes fitted to all types of bikes with 26" wheels.