natural rubber bicycle inner tube 1.A/V, E/V, F/V, G/V, I/V TR4 valves 2. ... normal bicycle tire, color bicycle tire and electric bicycle tire For bicycle tube , we have natural rubber tubes and butyl tube with A/V, E ... /V, F/V, I/V, G/V, TR4 valves etc. As follows are the available sizes for your selection. BICYCLE TUBE ...